IMPORTANT NOTE: The Targetron is a specific application off-axis guider not designed for general off-axis use. If you must have an extremely short profile guider (1.5") with a very large internal clear aperture (up to 2.75" depending on port rings used) then the Targetron is for you. However, if you are looking for a general application off-axis guider with superior features and function, then our 2" format Slider or larger-than 2" format Sidewinder optical manifolds will serve you much better.
Accu-Port Targetron, basic unit [only] as pictured at right (front & side view). A large-format off-axis guider with Y-Z axis control for quick and easy guide star acquisition. 180 degree rotating Z-axis ring and Y-axis rotating/scanning pick-off port offering exclusive 2-axis guide star acquisition. Interchangeable ports to use Targetron on more than one telescope or multiple cameras - any scope, any camera. 2.75" straight-through clear aperture without port rings installed. For 2" and larger format installation. Order optional Docking/Camera Port Rings and extension drawtubes as described below. Pictured at right is what you receive when you purchase a Targetron.
Item TARG (DISCONTINUED)
Docking Port Rings, required to dock Targetron to your scope. Optional docking port rings are available for all popular scopes on the market. They are listed at the DOCKING PORT RINGS link above right. If you don't find your specific docking port ring, call VSI and we'll custom machine one for you. Interchangeable port rings provide the use of multiple scopes and cameras utilizing one Targetron basic unit. Pictured at right is a representation of what you receive when you purchase a specific docking port ring for your telescope.
Select your DOCKING PORT RING from link above right
Camera Port Rings, required to install your CCD or 35mm imaging camera to the Targetron. Optional camera port rings are available for any CCD or 35mm camera on the market. Most of them are listed at the CAMERA PORT RINGS link above right. If you don't find your specific camera port ring, call VSI and we'll custom machine one for you. Interchangeable port rings provide the use of multiple scopes and cameras utilizing one Targetron basic unit. Most current CCD and 35mm cameras use the industry-standard 42mm-0.75mm T-thread. There are some exceptions, like the new SBIG STL11000 CCD camera. VSI offers a special camera port ring specifically for this new larger than 2" format SBIG camera. Pictured at right is a representation of what you receive when you purchase a specific camera port ring for your imaging camera.
Select your CAMERA PORT RING from link above right
Reverse Port Rings are the reverse thread (male or female) to its matching counterpart - Docking Port Rings. They are inserted in the Targetron's rear camera port to continue your imaging train using the same large-format threaded coupling as the input before the Targetron. You can then install a focal reducer, that needs a preset distance between itself and your camera, after the Targetron, etc. You could even install one of our MicroGlide Focusers on the output of the Targetron creating a secondary auto-focuser, without the hassle of modifying your scope's existing primary focuser. Just dock an auto-focus Epsilon or Omicron focuser to the output camera port of the Targetron and you're instantly auto-focusing your CCD camera.
Select your REVERSE PORT RING from link above right
1.25" to 1.25" Drawtube, usually required to perform off-axis guiding with the Targetron when using a 35mm camera in the output port. 35mm cameras typically focus about an inch and a half back compared to eyepieces and CCD cameras. Therefore you must extend the pick-off port the extra distance to parfocus your eyepiece with your 35mm camera. You may also need one or two of these drawtubes if you are going to install a MicroGlide focuser on the output port of the Targetron (see FEATURES link for more on this special installation). You can also use your existing 1.25" diagonal(s) to extend your guiding eyepieces or cameras. consumePictured at right is what you receive when you purchase the Drawtube. For more info, see ADAPTERS link above right.