topic Re: Someone has to be able to help with this antique Canon R-set 300mm in EF & RF Lenses

Someone has to be able to help with this antique Canon R-set 300mm

LArifleMAN — Wed, 18 Nov 2020 04:05:04 GMT

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.

Re: Someone has to be able to help with this antique Canon R-set 300mm

wq9nsc — Wed, 18 Nov 2020 04:31:51 GMT

You will find it pictured in the Canon global lens museum: https://global.canon/en/c-museum/product/r86.html

Rodger

Re: Someone has to be able to help with this antique Canon R-set 300mm

LArifleMAN — Wed, 18 Nov 2020 04:40:37 GMT

Thanks Roger, that's about all I've really found.

Re: Someone has to be able to help with this antique Canon R-set 300mm

MikeSowsun — Wed, 18 Nov 2020 07:12:36 GMT

Pacific Rim Camera has some information in PDF form about the Canon Canonflex RM camera and it's R mount lenses.

Canon Canonflex lenses

Canon 300/4 R

Pacific Rim Camera Canon Canonflex RM Reference Library

It looks like you are missing the "Lens Intermediate Tube" and the thumb screw to clamp it to the Lens Supporter.

Re: Someone has to be able to help with this antique Canon R-set 300mm

LArifleMAN — Wed, 18 Nov 2020 13:57:47 GMT

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.

Re: Someone has to be able to help with this antique Canon R-set 300mm

wq9nsc — Wed, 18 Nov 2020 14:25:45 GMT

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.

Rodger

Re: Someone has to be able to help with this antique Canon R-set 300mm

LArifleMAN — Wed, 18 Nov 2020 15:20:29 GMT

Oh I am determined. It may end up having terrible IQ but at least I tried.

Re: Someone has to be able to help with this antique Canon R-set 300mm

ebiggs1 — Wed, 18 Nov 2020 15:30:23 GMT

" ... 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.

Re: Someone has to be able to help with this antique Canon R-set 300mm

FrankBarrett — Thu, 05 Aug 2021 21:16:54 GMT

Just bought one via auction and amd also looking to learn more. It fits Canonflexes, the FT-QL, and Pellix. Thanks for the info.