Teleskop Service Geoptik Adapter for Canon EOS Lenses to T2 Thread w/ 0.25" Tripod Foot
Connect most CCD camera models with all Canon EOS lenses as well as lenses compatible with the Canon EOS bayonet that have been manufactured by other companies with this Geoptik adapter. Modifies EOS into standard T2 thread. Using the 0.25" thread at the base of this adapter, this system can be adhered to a camera tripod or piggybacked onto a telescope.
This adapter has an effective optical length of 19mm, leaving an adequate amount of back focus for nearly all CCD cameras and C-Mount cameras. Most of these cameras only necessitate 12-19mm of back focus. An appropriate T2 extension tube may need to be employed between the camera and this adapter to achieve ideal distance between the lens and the camera.
Teleskop Service Geoptik Adapter for EOS to T2 Thread w/ 0.25" Tripod Foot Specifications...
- Canon EOS bayonet with locking ring
- T2 male thread (M42 x 0.75)
- 19mm effective optical length (does not cover the length of the T2 male thread)
- 35mm clear aperture
- 0.25" camera thread and 3 x M5 thread for tripod or telescope adaptation
Teleskop Service Product Number: 30A189
- Additional Information
SKU TS-30A189 Manufacturer Teleskop Service Warranty 2 Year Warranty
- Included Items
- Teleskop Service Geoptik Adapter for EOS to T2 Thread
- 0.25" Tripod Adapter
- Questions & Answers
Product QuestionsQuestion by: Paul on Mar 2, 2015 9:13:00 PMQuestion by: Zach on Feb 19, 2016 3:42:00 PMYes, the QHY10 camera has a backfocus of 20mm or approximately 23-24mm with the rotation adapter and the Geoptic adapter has a backfocus of 19mm. You need to add a spacer to get to approximately 44mm total including the camera and Geoptic adapter for Canon lenses to focus, so a set of BA-T2RING shims may be needed.Answer by: Chris Hendren (Admin) on Feb 22, 2016 5:34:00 PMCan this mount to a Losmandy "D" style dovetail? And would there be any vignetting with an APS-C style camera sensor?Question by: Zach on Jun 19, 2016 12:04:00 PMYes, this will mount to pretty much any dovetail, but you will only be able to use a single 1/4"-20 screw to keep it in place (like a telephoto lens tripod foot). To avoid vignetting, you will have to unthread the 1.25" filter adapter inside the adapter and use larger filters (if you want to filter your image). Beyond that, you will have the natural vignetting/fall-off common to whatever camera lens you attach to the adapter.Answer by: Chris Hendren (Admin) on Jun 21, 2016 5:54:00 PMQuestion by: Ernest Joyner on Jul 28, 2017 9:44:00 AMYes this item will work with your gear. Canon lens's have a back focus of 44mm. Subtract 19mm for the adapter and 17.5mm the cameras back focus and you will need approx 7.5mm of extension. (you can be within 1mm or so of tolerance and still reach focus) for additional assistance please call or email us directly.Answer by: Anthony White (Admin) on Jul 28, 2017 12:47:00 PMWhat adapters/extenders would I need to connect a eos 50 mm lens to atik 314l with Geoptik adapter?Question by: jose catedra on Mar 3, 2017 6:39:00 PMIt's not clear from the diagram - does this adapter allow you to screw in 1.25" filters to allow for use with a mono CCD + NB or RGB filters?Question by: Joe Campbell on Mar 10, 2015 7:57:00 AMThis adapter lets you screw in one 1.25" filter at a time behind the lens. Normally this would be for a light pollution or H-alpha filter for a one shot color CCD camera, but if you refocused between each filter, you could use this for R, G and B filters with a monochrome camera.Answer by: Chris Hendren (Admin) on Mar 11, 2015 6:05:00 PM
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