11-17-2020 11:05 PM
I have found next to zero information on this particular lens. The 400mm version is currently on ebay, but I haven't seen any other examples of the 300. Add to that the portion that attaches the bellows to the mount is missing. I mean, I only paid $40 for this behemoth but I'd still like to clean it and try it out. Any help would be greatly appreciated.
11-17-2020 11:31 PM
You will find it pictured in the Canon global lens museum: https://global.canon/en/c-museum/product/r86.html
11-18-2020 01:24 AM - edited 11-18-2020 02:12 AM
Pacific Rim Camera has some information in PDF form about the Canon Canonflex RM camera and it's R mount lenses.
It looks like you are missing the "Lens Intermediate Tube" and the thumb screw to clamp it to the Lens Supporter.
11-18-2020 08:57 AM
Yes alright! Now that's some information I hadn't seen. Now I just need to find "intermediate tube R" I can imagine that's probably a needle in a haystack.
Thanks a bunch Mike.
11-18-2020 09:25 AM
It looks like you have the critical pieces because all bellows R has to do is block the light without getting into the optical path, the complex mechanical parts are there and bellows R was probably discarded earlier due to damage. I suspect you could pretty easily fabricate that piece out of a variety of materials if you are determined to use this lens.
11-18-2020 10:30 AM
" ... I'd still like to clean it and try it out."
I'm not much help but you aren't going to be able the clean that out.