Attaching Canon lenses to my CCDs

[Helen]

Mike has some nice Canon lens and I have some nice CCD cameras, so I'd like to have the option of putting the two together for nice widefields I know about the Geoptik adapter, but before I put that one on my Christmas list I wondered whether there were any alternatives - ideally that could take filters. Anyone using anything else?

Thanks

Helen

[Beyond_Vision]

It's worth asking the question to SteveL as he did this recently

Regards

Kevin

[Merlin66]

Mogg adaptors are available...

I use an adaptor made from a x2 camera convertor body and a piece of 1.25" extension tube!!

getting filters into the available space behind the lens is not easy!!

An alternative would be to use 2" astro filters infront of the lens. You can use filter step up rings to match the 55mm lens thread.

[SteveL]

Canon lenses have quite a short back focus distance compared to (example) Nikon lenses. My kit uses Nikons and a Gerd Neuman filter drawer, but he is unable to provide a Canon adapter because there just isnt enough room

You definitly want the filters inside the adapter and not attached on the front of the lens. Less dew and dust issues on those expensive bits of kit....

[Merlin66]

Steve,

What about adding a standard camera UV filter in front of the "expensive" astronomical filters...gives good protection.....

[Photosbykev]

The 44mm sensor to flange distance is the limiting factor as Steve points out. I made a small adaptor for my Canon 600mm lens that used a Canon rear lens cap to take a webcam with 1.25" nosepiece, it might be possible to make something similar that is shorter?

SPC880 webcam and the moon | PhotosbyKev

[SteveL]

Steve (Steppenwolf) made his own Canon adapter too:

Canon EOS Lens Adapter

[Photosbykev]

Steve (Steppenwolf) made his own Canon adapter too:

Canon EOS Lens Adapter

a lot more professional than my version, Using a 12mm Canon or Kenro extension tube would be much more compact and robust.

[BlueAstra]

I've come across this. Bit expensive though.

Canon EOS Lens to CCD Adapter :: Adapters - Photo Visual :: Altair Astro

[Merlin66]

Making or buying a suitable adaptor is the easy part......

trying to fit a filter between the lens and the CCD is the difficult part!!!

Hmmm just thinking as I type (always difficult to do!) why not have a shorty 1.25" nosepiece with a screw in 1.25" filter??

Sure, it can only really be used for smaller chips, but may just work....

[Helen]

Thanks for the info guys. At the moment I'm not too hung up on the filter requirement, but thought that if one which would do it was available then I'd get that instead of one of the non-filter options

Helen