Astro Essentials Canon EF Lens to T2 Adapter for CMOS/CCD Cameras
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 Astro Essentials Canon EF Lens to T2 Adapter for CMOS/CCD CamerasAstro Essentials Canon EF Lens to T2 Adapter for CMOS/CCD Cameras 

Astro Essentials Canon EF Lens to T2 Adapter for CMOS/CCD Cameras

£59.00
  (1 Review)
✓ 2 year warranty

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About this product

Model:  ae_canon-ef_t2_adptr

Enables you to fit your EOS lens to a CMOS or CCD imaging camera. 

Works with all Canon EF lenses (full-format & APS-C) or Canon EF fitting lens from third-party manufacturers, like Sigma. 

The T2 male thread on the camera side provides easy connection to the camera of your choice. 

A 1.25" filter adapter with M28.5 thread is also included.  (Cameras with larger sensors will show vignetting when used with 1.25" filters). 

Canon EF lenses require a sensor to flange distance of 44mm.  The adapter has a thickness of 19mm so to achieve the necessary 44mm spacing an extension/spacer tube will be required.  For example, if the camera's sensor is set 17.5mm inside its body (i.e. a ZWO ASI1600 or ASI294 with their 11mm spacer fitted) then 44mm - 19mm - 17.5mm = 7.5mm.  In this instance the Baader 7.5mm spacer will be perfect! 

The base of the adapter includes a regular 1/4" photo tripod thread (also three M5 threads) so will fit directly to a photo tripod or piggyback adapter.  Another two M5 threads are on the top outer edge. 

Machined from black-anodised aluminium. 

Customer reviews

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Beware!
Monday, 11 May 2020  | 

The ‘standard’ ZWO camera clamp works fine with light weight Canon EOS lenses. The wide angle Sigma 8-16mm lens is very heavy and I was unhappy supporting it via the camera clamp. The Astro Essentials adaptor removes the load from the camera to the lens bayonet fitting. Unlike the standard Canon EOS locking pin arrangement it relies on a threaded locking flange that clamps the lens by friction. This is where the design falls apart. The fixed and rotating locking flange are the same diameter and very close together making it difficult to achieve a satisfactory locking force. It is quite easy when adjusting the lens focal distance to inadvertently unscrew the lens from the adaptor…

I have no idea how you could free it off if you did manage to over tighten it.

Nice idea but not worth risking an expensive lens system for. So one for the recycling bin.

One star for the machining quality.


Response:

Your feedback has raised concerns here as we have had no negative reports of this adapter so far. We had already tested it on a range of lenses but Rob in our workshop has also checked his range of lenses including some very large ones and found no issues with the strength of this adapter. If used correctly and tightened properly it will hold without any issues.

Perhaps you were not tightening your one sufficiently or it has a machining flaw. If so, please contact us and we would be happy to replace or refund it.

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