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The OPTICS link supports any item that has glass in its construction, or that might have glass attached, like an adapter/coupling, etc. If any of the items listed here relate to another AREA, you might find the same item listed twice. Examples would be an audio/video cable listed at the A/V and CABLES links, or a book listed at the BOOKS and EDUCATE links, etc. Newest item listings (largest item numbers) are at the TOP of each AREA MENU page.

Item 208: A very informative [pocket] Schott Optical Glass reference pamphlet. Contains all the main [important] properties of optical glass from the Optical Glass Catalogue, No. 3111. Packed full of formulas and everything else you ever wanted to know about optical glass, almost everything. Includes fold-out graphs and indexed reference tables. 94 pages. Good "filler" to complete your $25 minimum. Price: $5

Item 131: SOLD These are higher quality 0.965" eyepieces, compared to the "cheapos" above. Some have been converted to 1.25" format by me many years ago. The back right 0.965" format eyepiece is variable power push-pull. OUT is 32mm and IN is 26mm. Doesn"t say the optical config on the housing. Both the back left and center are 0.965" crosshair eyepieces. One says Meade H35mm and the other says 8x50mm on the housings. The three in the center row have been [very professionally] converted to 1.25" from 0.965 inches. Fron left to right, University Optics Orthoscopic 5mm, Ramsden 9mm and don't know about the right one, except that it is a very low power, widefield eyepiece. The two eyepieces in the front row are an H23mm and a Celestron K.6mm. In my humble opinion, I think the best ones are the 32/26mm push-pull 0.965" eyepiece and the University Optics 5mm Ortho eyepiece in 1.25" format. Those two alone are worth a measly $25 each. No pick and choose. All for $50 That's five dollars and change each!

Item 130: SOLD A bunch (19) of "cheapo" eyepieces in 0.965" format. However, all are made in Japan, not China, so not so "cheapo" maybe? Most are new. The ones in the back two rows are mostly 4mm with no optical config marked on the housing. Probably Huygens, Kellner, or Symmetrical Ramsden (SR), etc. The six [plastic tube packed] eyepieces between the two boxes are 4mm, 12.5mm and 25mm, mostly SRs. The blue box is a 5.5mm Huygens and the Tasco box holds a 12.5mm Huygens. I don't know anything about the black eyepiece in the front by itself, except that the housing is a bit smaller than 0.965 inches. No pick and choose. All for $25 That's a dollar and change each!

Item 129: I have 17 (now 14 left) of these, what I believe to be, microscope eyepieces. They are marked 15X on the top and have a barrel diameter of 0.912 inches. They seem to be a 3 or 4 element optical configuration? Most are new, or in new condition. Possible fillers to make your $50 minimum purchase? $5 each or 5 for $15

Item 128: This is a cemented achromat with a diameter of 1.77 inches. Fully coated on both sides with a focal length of about 5 or 6 inches. You can [simply] use them as an objective for a small viewfinder, or possibly as a field lens for a shop/homemade Plossl or "whatever" eyepiece. As you can see from the picture at right, I have a large quantity of these lenses. They are new in the original wrappings. Possible fillers to make your $50 minimum purchase? $5 each, or 10 for $35

Item 127: SOLD Honestly guys, I had no idea what this optical device does, or its purpose. I thought it was a microscope device and not a telescope device. A very nice person sent me an email and told me that it was a micro/telescope SLR adapter, if that helps to determine a use for this device. I guess your analog or digital SLR camera attaches to the white circles using the three clamping thumb screws opposed by 120 degrees. The small "tube" protruding from the side has a very smooth operating helical focusing eyepiece at the end. It probably has off-axis applications? It comes in a very nice velvet lined instrument case that says "Lafayette F-506 JAPAN" on the top of the case. And, as you can see, it also says Lafayette on the round black cover. The other end, that is not shown, has a protruding knurled compression ring that would accept about a 1" diameter barrel-nose, but could easily be modified to 1.25" format. This device obviously cost much more than I am asking. If you have a use for it, then you will get a real bargain at this price. $75

Item 126: Now this "naked" item is as rare as it gets, so I took 5 pictures to illustrate the exceptional qualities of this optical contraption. Understand that all the pictures are taken in daylight conditions, so the patterns below are not optimum. They simply illustrate what is there. Still, the myriad of optical possibilities are truly mind boggling. To provide a size relationship, the width of the black part of this prismatic device is 2.3" so it is easily worthy of any 2" format application. If you shine a light in the hole in the end of the small angled prism on top (pictured above left), you get the reticle pattern show below left. If you send an image, or whatever, into the other [flat] side of the prism, which is the other end of that same small prism, you project the images show directly below center. Maybe some kind of "heads-up" display application here? The picture below right is shining a bright light directly into the smaller prism's hypotenuse flat end from the top. It has an incorporated steel mounting bracket and a single-element convex lens at the output of the prism. If you hold one of those small achromats below (Item 128) about a foot in front of the prism, it achieves focus nicely. The lens surface has a small, very slight "sleek" on the optical coating (not a scratch) that does not show in any optical application. $275

Item 124: A matched pair of 3" minor axis diagonal flats. Full-thickness (1/2"). Probably 1/10th wave surface or better. I was going to use them to make a giant pair of binos at one time. Excellent coatings. There is one very small 0.15"chip noted by the red circle in the left picture and enlarged to make it look like a gigantic crater in the right picture. Actually, you can barely see it, and would not effect anything optically. Both for $100

Item 123: This is a real ugly piece of glass. Might be Pyrex? This is a giant unground prism blank. It does have a few chips here and there, as shown in the picture. The dimensions are 4" long by 3" x 3" and the hypotenuse is also 4" so the largest glass surface is 4" square. Probably a would be prism that never made it into a tank? What's it worth? Not much. Make a good paper weight or whatever. Use it to complete your $50 minimum required purchase? $20

Item 122: I am pretty sure that you can't find these guys anymore, anywhere. It's a tank eyepiece housing with all the good stuff still attached or inside. The eyepiece is around a 32mm Erfle (very widefield) and inside behind that great helical focusing eyepiece is a giant 2" double cemented erecting prism system. After that, there is a 2" achromat objective. You can use it as a low-power erecting telescope right out of the box, mount it to a telescope as-is, or disassemble it for parts. The items 24 and 29 below are what you can do with just the helical eyepiece. The item 18 below is the internal prism assembly, and the objective can be used to make a nice viewfinder. Although you already have a right-angle erecting viewfinder if you just leave it alone. Might want to clean it up a bit, because it is in original condition when it was removed from the interior of the tank. $125

Item 85: SOLD A Meade SCT reducer ring. Screws onto the visual back of larger Meade 10" or 12"Catadioptric scopes (SCTs, Ritcheys, etc.) and down converts them to the industry-standard 2"-24tpi threaded format. I found this extra one in a box, still in its original packaging. NEW, never used. You might need an extra one sometime. Don't know what Meade sells them for, but I know it's a lot more than I am asking? Price: $10

Item 83: Remember SLR film cameras? They may be obsolete for terrestrial pictures, but some of us still like to do astrophotography the old fashioned way. Or just use it as a regular film camera. Minolta Maxxum 3xi body with digital LCD info readout and motorized film advance. Includes a motorized autofocus [and autozoom] 28mm to 80mm, f/4-5.6 lens. Other accessories include a pack of three close-up lenses, a Minolta T-ring and a polarizing filter. Original manuals. This guy cost over $400 at one time. Top-of-the-line SLR film camera. As NEW condition. Only a few rolls of film ever went through this guy. And I'll throw in the camera bag, pictured at right, too. Price: $100 takes all!

Item 82: SOLD This strange looking device is an old Tuthill Polar Alignment Scope. It attaches to a 1.5" diameter RA shaft, like the larger German equatorial mounts that usually have large Newts mounted on them. Just slip the hole in the plate over your shaft and lock it down with the thumb screw. The scope is a rifle scope with crosshairs and a pointer attached. You simply rotate it to offset true north using the degree circle indicator on the plate. Quick and easy polar alignment. Don't know what they cost back then? Price: $25

Item 79: SOLD Another very rare illuminated reticle eyepiece with a built-in diagonal prism. All one piece construction. This WWII optical device was retrofitted and modernized by me many year ago. It was refitted with a 1.25" barrel-nose input and a light port that will accept a standard LED, like the one shown above on the 2" illuminated reticle eyepiece (item 24). The brass eyepiece itself is push-pull adjustable to focus on the internal reticle. Very solid construction. No illumination LED, but easy to retrofit one. Price: $125

Item 77: SOLD The binos on the right are Bushnell Ensign 10x50s with hard case. They have fully coated optics and the Insta-Focus control instead of the wheel focus. Diopter on the right lens. The binos on the left are optical path demos. The left side is cut in half to reveal the lenses, prisms, mechanicals, etc. The right side is fully functional as a monocular. If fact, if you look just right, both sides work as binoculars. The demo binos are FREE when you purchase the Bushnells. Like NEW. Original price was about $50. Price: $25 (price includes FREE demo binos)

Item 66: SOLD A couple of solar wedges. One 0.965" and one 1.25" format. They transmit about 90% of the sun's light straight through the glass wedge, shown in the bottom of the left wedge. They are good for projecting a solar image on a white surface, like a sheet of paper. They will prevent your eyepiece from over heating and possibly cracking the lens, etc. Not sold separately.  For solar image projection only. Do not use this device to view the sun directly through an eyepiece! Price: $15 for both

Item 65: SOLD I have these quality glass color filters in 2, 1.25, and 0.965" formats. All are mounted in male/female threaded metal cells. Most of them are new and have never been used. All or nothing. You can have all that is pictured for $50

Item 59: SOLD I don't know where this guy came from, or what it was mounted on in the past? It is a 2" format helical focuser with an adjustable spring loaded ball so you can simply push the (shown fully extended) moving tube in or pull it out with your hand, or rotate it for smooth fine focusing. All aluminum construction and black anodized. Price: $20 or make me an offer.

Item 56: I have a handful of 1.25" format eyepieces that are very good quality. Mostly Plossls and Orthos. One is a zoom and one is a 12mm illuminated reticle eyepiece without the illumination, but easily retrofitted. Front row left = University 6.8mm Ortho SOLD. Front row right = 8mm Questar Brandon SOLD. Middle row left = Meade MA12mm illuminated reticle. Middle row center = 25mm Ortho SOLD. Middle row right = University 13mm Wide View Plossl SOLD. Back row left = Zoom eyepiece SOLD. Back row left center = Meade MA25mm. Back row right center = Meade 9mm Ortho SOLD. Back row right = Meade 20mm Super Plossl SOLD. Your choice. Price: $25 each (or less each for more than one)

Item 55: SOLD A shorty 4" refractor telescope made from a studio video camera lens. Very high quality German-made multi-element lenses with a zoom/focusing ring (see picture) attached to a 1.25" rack and pinion focuser. This is not a copy lens. Very high quality images in a short 12" long package. The lens itself cost thousands of dollars at one time. Price: $75

Item 54: SOLD Many viewfinder/guide scope collimating bracket sets. 1.5, 2, 3" diameter pairs. You can have any pair/set for $10 or all of what you see in the picture for $35 (If you want all of them, don't wait too long)

Item 52: SOLD Side ports for a flip-mirror. One is just a 2" port and the other is an off-axis guider with mirror angle control. The plates are 4" square. Many possibilities for the ATM, and cheap too. Not sold separately. Price: $25 for both

Item 51: These very strange devices were part of a professional-level product that was discontinued many years ago. They are basically an off-axis guider, with a mirror angle adjust knob and a miniature flip-mirror inside the box that sends your image to the top or straight-through ports. If you have a flip-mirror optical manifold. You can drill a 1" hole in the side and screw this device on to the side of the box using the bracket shown on the side of the device. You will then have an off-axis guider with a two port capability. Both ports are 1.25" format. These guys were the heart of a very advanced, multi-thousand dollar device, at one time. Another ATM project for cheap. I had two. SOLD one. Only one left. Price: $35

Item 43: SOLD Thousand Oaks Glass Solar Screen that fits a 9 5/8" OD tube diameter. Has a couple of minor scratches on the inner surface. They've been painted black. You won't even know they're there when you observe the sun. If your tube is a little smaller, you can simply glue more felt around the inner aluminum ring. This solar screen cost me over $100 many years ago. Orion's price is a lot higher than mine. Price: $50

Item 42: SOLD A giant lot of adapters of all sizes and types. There is even a slide duplicator in the package. Eyepiece tele-extender, T-thread drawtubes, variable polarizing and iris devices, reducers, camera adapters, and a lot of other converter things, etc. 20 to 25 adapter things, give or take. There are a few of them that cost my asking price EACH! In other words, if you had to purchase them individually, they'd cost you more than 10 times my asking price. Not sold separately. All or nothing. Price: $100

Item 41: SOLD A 60mm Meade spotting scope with a zoom lens system. 15x to 45x. Coated optics. Made in Taiwan. 1/4"-20tpi threaded mounting base so you can attach it directly to a camera tripod. As NEW condition. Price: $25

Item 40: SOLD Ten T-rings for many different types of cameras. Don't ask me what cameras they fit. I don't know. The price is right at $3 each. Not sold individually. All 10 for $30

Item 39: SOLD NEW 9x50mm straight-through finder scope with collimating mounting bracket. The tube mount screws onto any size tube and the collimating bracket assembly slides out of the dovetailed tube mount. No markings but probably from Orion. Cross-hair reticle eyepiece. NEW, never-used condition. Less than half of what you would pay from Orion, etc. Price: $25

Item 38: SOLD 2"format Meade diagonal. Mirror-type. Typical Meade Plastic construction. Not a hi-end diagonal, but it is good for visual observing and it's cheap for a 2" diagonal. Price: $25

Item 37: A bunch of diagonals in 1.25" and 0.965" (24.5mm) formats. I have both prism and first-surface mirror types in 1.25" format SOLD-OUT. I have one that converts from 0.965" to 1.25"SOLD. And ones that convert from 1.25" to 0.965". I think all of them are metal construction? Excellent condition. Your choice. Price: $20 each

Item 36: SOLD-OUT Illuminated reticle 1.25" eyepieces. One from Celestron and one from Meade. The Celestron is their Micro-Guide 12.5mm multi-coated eyepiece with LED illuminator that unscrews and rubber eye shield (item #94171). The Meade is their item #07068 multi-coated 9mm Plossl with LED illuminator. This one has adjustment of the reticle position by turning the two thumb screws on the eyepiece housing. Both are NEW in box. I bought them and never used them. You can check the current prices with Celeston and Meade. My price for these NEW IREs is much less. Price: $50 each

Item 34: SOLD This item is a Meade focal reducer that will convert your f/10 scope to around f/6. It has female 42mm T-threads on one side and male on the other. It has a massive piece of glass inside. The housing measures 4" in diameter and the focal reducer lens element is about the same diameter inside. It unscrews if you want to see the [relatively] giant lens or just remove the lens for cleaning. Excellent condition. I don't know what Meade sold them for many years ago. I think my asking price is a fair value guess in today's market? Price: $75

Item 33: SOLD A Criterion rotary 3-eyepiece [non-diagonal] turret with click stops. The input is a 1.25" format barrel-nose and has three 1.25" eyepiece holders that hold the eyepieces in by compression. A great rotary eyepiece turret for Newts and Dobs. Good condition. Price: $50

Item 32: SOLD An unusual rotary 3-eyepiece [non-diagonal] turret that I custom machined in the early days of BFO. It has click stops and rotates on a ball-bearing. The input is a 2" format barrel-nose and has three 1.25" eyepiece holders with locking thumb screws. A great rotary eyepiece turret for Newts and Dobs. Very robust construction. Could use a little cleaning but in good condition. Price: $50

Item 31: SOLD A Celestron 1.25" [prism-type] diagonal turret. 1.25" barrel-nose holds four 1.25" eyepieces. A good 5 or 6 eyepiece turret sells for around $500 new, a great one sells for more (I would know). Is a lesser 4-eyepiece turret worth 1/3rd less (about $300) because it holds 1/3rd less eyepieces? Probably? My price is much less. Price: $75

Item 30: SOLD This is a matched pair of 2" format focal reducers. Positive achromats. They can shorten the focal length of your big binos or use them individually for whatever. Not sold separately. I would like $75 for the pair.

Item 29:  SOLD A matched pair of very rare 32mm (non-rotating) helical focusing eyepieces in 2" format. These are really wide-field eyepieces. I think they are 5-element Erfles? The were take-outs from a WWII tanks. One is fixed (non-focusing) and the other is shown focused out to illustrate its focus range. One is marked with an "F" for fixed (non-focusing) and the other is marked with a "D" for Diopter (helical focusing). In other words, they are set up like a pair of binoculars where one eyepiece is fixed and the other focuses individually (diopter). They would be great for fine diopter focusing on big binos. Not sold separately. Value = No idea! Price: $200 for the pair

Item 28: A pair of very rare matched 40mm (non-rotating) HELICAL FOCUSING eyepieces in 2" format. One is shown focused IN and the other is focused OUT to illustrate their independent focus range. I think they are 5-element Erfles, but could be something else? Whatever optical config they are, they perform great. Looking through one of them reminds me of the coveted Clave eyepieces with tack sharp images to the edge of their [not-so-wide] field using minimal elements to get there. All these mega-element fisheye, built-in Barlow eyepiece configs create very expensive "grenades" that do nothing to improve you image over a simple, quality 3 to 5 element design. Personally (and off subject), my favorite eyepiece config is the Konig, offered by University Optics. I have seven Konigs in my personal collection of about 20 or so eyepieces, including my all-time favorite in 2" format, the University Konig MK-70 40mm. No, you will never see this one on Paul's List. I would keep these guys too, but I have no use for a matched 2" format pair of eyepieces, so might as well let someone else enjoy their ultra-smooth helical function and clarity. Did I mention how rare these are? They would be great for fine (diopter) focusing, or even primary/secondary focusing a big bino, etc. Their value is a lot more than I am asking because of their "one-of-a-pair" rarity. Did I use that "R" word again? I seriously doubt if this matched pair exists anywhere else on Planet Earth. Go ahead, try to find them on ebay, etc. I dare yah! No, I'm not "giving them away" and that's why everything around them has sold and these haven't, yet. I know what I have here, and they're not going for cheap, because they are worth much more than I am asking, and I know it. I thought that this item would have sold long ago. I'm very surprised that it hasn't, because my price is very reasonable. Not sold separately. Price: $300 for the pair

Item 27: SOLD A Nikon F2 body for 35mm film astrophotography. You remember "analog" 35mm film, right? Maybe it was before your time? If not, then this is a very functional 35mm film camera for astrophotography, because it not only has a Beattie intenscreen film plane which cost as much as I am asking for everything, but it also has a custom eyepiece insert that simply replaces the original prism housing on the top of the Nikon body. Push the button to remove the original prism viewfinder and replace it with the custom eyepiece insert. This is a right angle viewer for your F2, and it is push-pull focusable on the internal focal screen. Body condition is good and everything works. If you do 35mm film astrophotography, this setup will take the kink our of your neck! Value = $? Price: $150

Item 26: This "diagonal" device is the weirdest of the weird. I am almost certain that it is the only penta prism diagonal in the world in 2" format. It is basically a 2" format diagonal that lengthens your profile optically without lengthening your profile physically. In other words, it is like having a foot-long drawtube in a short diagonal device. You image goes in the front, bounces off five (as in penta) silver coated surfaces, and comes out the top, erected and correct left to right and right side up, like a roof prism. This diagonal is like the erecting 2" roof-prism diagonal above (item 21), except it takes a longer path to get to the eyepiece. Or, if you want to create a very short tubed scope, this is for you. Value = Too rare and unique to value. Price: $350

Item 25: SOLD This 2" format flip-mirror diagonal was the first proto-type "Flipper" that was [later] put into production in the early years of VSE, now VSI. Now discontinued in favor of my shorter profile (slide-mirror) Sliders. It was used for many years on one of the viewfinders on my 30-inch Cassegeain as a simple diagonal. It has a 1/10th-wave, full-thickness, first-surface, elliptical (diagonal-type) mirror with a dielectric enhanced reflective coating. The flip action is like a fine sports car in operation. You will have to experience the function to appreciate that statement. You simply flip the gray lever knob from 90 degrees to 0 degrees and it locks in place for straight-through operation, and [spring] release it by turning the smaller black knob on the bottom of the housing. No off-axis capability. It is a 2" format flip-mirror. Value = $750. Price: $300

Item 24: SOLD This is a rare 2" format illuminated reticle eyepiece. Probably around 40mm, give or take. It is a 5-element Erfle design. I custom built this reticle eyepiece for my 30-inch Cassegrain's 6-inch f/5 finder scope. It was originally used as a targeting eyepiece in a WWII tank, without the reticle. The eyepiece has helical focusing so you can fine focus on the internal reticle lines. It comes with a battery operated (2 D-cells) power supply with a dimmer control. The batteries need replacing, or the red LED will operate on any 3vdc power source connected to the 1/8" phono plug. By loosening the small thumb screw on the aluminum LED housing, the LED slips out so you can easily use other light sources to illuminate the reticle. Value = Too unique to set a value, especially in 2" format. Price: $200

Item 23: This unique 2" Crayford focuser was custom built "one-of-a-kind" for the 10" Ritchey pictured at right. FYI, the Ritchey at right sold for $25,000 and was cheap at twice the price. However, the focuser was removed from the scope and refitted with a VSI MasterGlide 4 focuser, as shown in the right picture. It has a 12.5" long brass moving tube that doubles as a baffle tube, and a [real] compression clamp to lock your 2" barrel-nose eyepiece or diagonal in place. The redundant smaller knob that is parallel to the moving tube locks the Crayford focusing shaft. The 4rpm Hurst synchronous motor is [stainless steel] spur gear driven (not shown) and has a selenoid engaging mechanism that can be wired to automatically disengage the motor from the focusing shaft for manual focusing. The motor and selenoid both operate on 120vac. You could even plug the motor into a variable frequency drive (offered below, item 44) for speed control. It also has a small knob that provides an approx. 6 to 1 fine focus reduction (not shown). This is a very fine, ultra-high build quality focuser for the right Cassegrain or refractor scope! This focuser is actually new and was never used, but it has been sitting on a shelf for many years so it needs some minor refurbing. If you are curious about the scope on the right, you can go to my INSTALLATIONS link and scroll to the bottom of the page (A Unique 10" Fork-Mounted RC Scope). Value = $1000+. Price: $400

Item 22: SOLD The "rarest of the rare" is this gigantic 60mm wide-field Erfle, 5-element super eyepiece. This giant "grenade" measures 3" in diameter and 5" long. Again, this WWII vintage giant eyepiece was retrofitted by yours truely, for use in 2" format. Actually, I used it in my proprietary 3" format focuser at Black Forest Observatory on my 30-inch Cassegrain. The field lens is approx. 2.5" in diameter, so its flat [ultra-wide] field of view rivals high-end [fisheye] Naglers, when used in it's original 3" format. Even when stopped down with it's 2" barrel-nose, the field is impressive and all you would ever want - or need. Of note is the removeable bottom. It unscrews to reveal the giant field lens. This simply means that you could retrofit this eyepiece with a custom larger format input without too much effort, and a little lathe work. You won't get this guy away from me for cheap, either! There is only one! No offers, but I might take $800 for this super eyepiece and the diagonal below? Value estimate = Priceless! Price: $500

Item 21: SOLD Another "rarest of the rare" is this large 2" format roof prism diagonal, retrofitted by yours truely, from a giant WWII Japanese ship's spotting scope. This giant roof prism is an erecting diagonal, so your images are correct right to left and right side up. The prism itself is removeable by unscrewing the screws on the bottom of the housing. You won't get this guy away from me for cheap! Again, there is only one! No offers, but I might take $800 for both the diagonal and super eyepiece above? Value estimate = Priceless! Price: $500

Item 20: 14" long by 2.25"wide by 0.25" thick first surface mirrors. Good coatings. New, never used condition. Probably some laser application, but can be easily cut with a glass cutter and used for other optical applications. Since the glass is larger than 2" wide, it would be perfect for anything in 2" format - flip-mirrors, diagonals, turrets, etc. I have a quantity of these, so quantity discounts are available. Value estimate = $75+ each piece. Price: $10 each

Item 19: Very rare giant 4" square by 0.25" thick beam splitter glass. From examination, they look like 50% pass by 50% reflected. but could also be 60% pass by 40% reflected. They are easily cut with a glass cutter. Use at a 45 degree angle to send 50% forward and 50% to the side at a 90 degree angle. New, never used. I have a quantity of these, so quantity discounts are available. Value estimate = $100+ each piece. Price: $25 each

Item 18: SOLD Cemented erecting prism. Large 2"x 2" face. This giant prism will correct your image left to right and turn it right side up. I think it was out of a WWII US tank targeting sight. Would make a great 2" format erecting diagonal for terrestrial/target observing, etc. One minor edge chip noted in picture. Value estimate: = $75. Price: $20

Item 17: SOLD Matched set of very rare and large roof prisms. The huge faces are 1.5" square. They could easily be used in a 2" format eyepiece applications. The condition is excellent, except for one small edge chip noted in the pucture at the far right. Otherwise, the condition is perfect. The darker orange material noted on the side of the prisms are some kind of glued-on plastic spacers. These are erecting roof prisms so your image will be correct left to right and right side up. I think they are out of a WWII Japanese ships giant binocular. Not sold individually. Value estimate for the pair = $500+. Price: $175 for both.

Item 16: Cube-shaped cemented beam splitter, 0.9" cubed. From looking through the cube, I would guess it is 50% straight-through by 50% right angle? Small minor edge imperfection noted in picture. Otherwise, excellent condition. No idea on the material. Maybe Pyrex or fused silica? Value estimate = $75+. Price: $20

Item 15: Matched pair of 2" diameter gold coated prisms. Who knows? They are extremely high quality and in excellent to very good condition. They might have some optical application, but probably were designed for some esoteric laser death ray? Could be fused quartz, Zerodur, etc. No chips. I am sure they had a high dollar cost originally. Not sold individually. Value estimate for the pair = $?. Price: $50 for both.

Item 14: SOLD 4.125" diameter cemented achromat. Don't know focal ratio, but probably f/8 or f/12? Minor surface abrasions to the anti-reflective coating only. No chips. Inexpensive refractor project. Value estimate = $500. Price: $125

Item 13: Both first-surface mirrors are 2" in diameter. The left mirror is an optical flat, 0.3" thick. The condition is excellent. No chips or flaws. Assume better than 1/10th wave surface accuracy. A perfect small optical flat! The right mirror has a concave curvature, 0.5" thick. Coating is spotted, but very useable, or you can have it recoated. Could be a secondary for a Cassegrain? Either mirror could be Pyrex, fused quartz, Zerodur, etc. Sold separately. Left mirror flat price: $25. Right concave mirror price: $15

Item 12: 3" diameter concave first-surface mirror. 0.3" thick. My guess would be a fairly slow curve. Maybe f/10? Minor surface coating abrasions, but very useable. No chips. Value estimate = $100. Price: $20

Item 11: 3" diameter first-surface optical flat. 0.5" thick. Minor surface coating deterioration, but very useable. The glass has a very yellow color, so it is probably low thermal expansion Zerodur. No chips. Value estimate = $250. Price: $45

Item 10: 4.25" diameter cast blank. 0.7" thick. Probably a early Pyrex blank from Edmond Scientific? Good condition. No chips. Good mirror grinding starter project. Value estimate = $65. Price: $25

Item 9: Matched pair of 4" diameter blanks. 0.5" thick. Smooth ground on one side and rough ground on other. Don't know anything about these blanks. Maybe you can determine something about these blanks from the numbers on the boxes? Probably Pyrex but could be quartz or fused silica, etc. Good condition. Minor insignificant chips on rough ground side only. No chips on smooth ground side. Not sold individually. Value estimate for the pair = $100+. Price: $45 for both.

Item 8: Matched pair of 6" diameter Cassegrain blanks with a 1.375" center perforation. 1" thick. Smooth ground surfaces on both sides. Don't know anything about these blanks. Probably Pyrex but could be quartz or fused silica, etc. Excellent condition. No chips. I was going to create a nice pair of Cassegrain binoculars but, again, the project passed me by. Maybe you'd like to continue this effort? Not sold individually. Value estimate for the pair = $350+. Price: $150 for both.

Item 7: SOLD 6" diameter Newt primary mirror. 1" thick. Don't know focal length of this mirror. Probably f/6 or f/8. Excellent reflective coating and overcoating. No chips. Assume better than 1/10th wave surface accuracy. All you need is a small diagonal mirror flat and you'll have a great Newt optical set. Value estimate = $250+. Price: $100

Item 6: SOLD 7.2" diameter mirror blank. 1.7 thick. Rough ground surfaces both sides. Don't know anything about this blank. Probably Pyrex but could be quartz or fused silica, etc. Excellent condition. Very small chip on one side only (see picture, lower left edge). Great price if you want to push some glass. Value estimate = $175+. Price: $50

Item 5: SOLD This is a very high quality ZOOM TV lens made by Sony. 1:1.8, f=12.5-75mm. Lens made in Japan. Dual Zoom and focus plus iris control. C-mount threads. Near NEW condition. This is the same lens (I had two and this was a spare) that I used for my projection lens array on my Solar Tracking Heliostat (shown above right, item 3). It allowed me to focus and zoom in and out on solar prominences, white light sun spots and granulation in real time projected on a 6-foot projection screen. I would like $75

Item 4: 6" diameter first-surface optical flats. 1" thick. I have three of them. One has been SOLD. Don't know anything about these mirrors. Assume better than 1/10th wave fused quartz since I had two others from the same lot that were etched FUSED QUARTZ on the back. Could be Van Keuren mirrors? Either way, the price is rediculous compared to new or other "not-new" flats on the market. Excellent reflective surface coating with overcoat protection and no chips. These flats were destined for other solar tracking heliostats like the 8" one pictured below. This could be the "heart" of a great club project. All you need is a tracking fork mount. I used a simple, fixed-position 4" achromat lens coupled to a zoom projection lens (pictured above) to project a 6-foot diameter image of the sun on a movie screen inside my observatory for all to see. The real-time, hi-rez white light granulation and sunspots were spectactular and, if you want to go that far, the H-Alpha was better. Whoa! Value estimate = $1200. Price: $350

Item 3: SOLD 8" diameter first-surface optical flat. 1.3" thick. Don't know anything about this mirror. Assume better than 1/10th wave fused quartz since I had two others from the same lot that were etched FUSED QUARTZ on the back, but could be Pyrex? Could be a Van Keuren mirror? Either way, the price is rediculous compared to new or other "not-new" flats on the market. Very good reflective surface coating with overcoat protection and no chips. This flat was destined for another one of my solar tracking heliostats like the 8" one pictured above. This could be the "heart" of a great club project. All you need is a tracking fork mount. I used a simple, fixed-position 4" achromat lens coupled to a zoom projection lens (pictured at right) to project a 6-foot diameter image of the sun on a movie screen inside my observatory for all to see. The real-time, hi-rez white light granulation and sunspots were spectactular and, if you want to go that far, the H-Alpha was better. Whoa! Value estimate = $2400. Price: $450

Item 2: SOLD 10" diameter first-surface optical flat. 1.7" thick. Don't know anything about this mirror. Assume better than 1/10th wave fused quartz since I had two others from the same lot that were etched FUSED QUARTZ on the back, but could be Pyrex? Could be a Van Keuren mirror? Either way, the price is rediculous compared to new or other "not-new" flats on the market. Excellent reflective surface coating with overcoat protection and no chips. This flat was destined for another one of my solar tracking heliostats like the 8" one pictured at right. This could be the "heart" of a great club project. All you need is a tracking fork mount. I used a simple, fixed-position 4" achromat lens coupled to a zoom projection lens to project a 6-foot diameter image of the sun on a movie screen inside my observatory for all to see. The real-time, hi-rez white light granulation and sunspots were spectactular and, if you want to go that far, the H-Alpha was better. Whoa! Value estimate = $4500. Price: $600

Item 1: Pair of 8" diameter Cassegrain mirrors with preformed curves. I assume they are Pyrex? One is finish ground and one is rough ground. Don't know the primary focal length. 2-inch center perforations. Very minor edge chips. I was going to make a binoscope out of these mirrors, but never found the time. Not sold separately. Both for $165

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