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New Contributor
Posts: 4
Registered: ‎11-17-2020

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

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.
IMG_20201117_204725.jpgIMG_20201117_204703.jpgIMG_20201117_204638.jpgIMG_20201117_204347.jpgIMG_20201117_204324.jpg

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Respected Contributor
Posts: 1,189
Registered: ‎01-25-2018

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

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

 

Rodger

EOS 1DX M3, 1DX M2, 1DX, 5DS R, 1D M2, EOS 650 (film), many lenses, XF400 video
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New Contributor
Posts: 4
Registered: ‎11-17-2020

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

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

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Reputable Contributor
Posts: 869
Registered: ‎12-24-2013

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

[ Edited ]

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 

 

1011EF78-2F70-41B1-BC0B-845B7A863C33.jpeg

 

DFDF750E-2CDC-4454-8414-ADC563ABCE03.jpeg

F73A653C-0673-4476-9661-00EC12AECD39.jpeg

 

 

 

 


Pacific Rim Camera Canon Canonflex RM Reference Library 



 

 

E3B97B76-E975-4998-AB1A-B1F9DFED08C7.jpeg

 

 

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

 

 

 

 

1DC0AFCF-4A6C-484F-8E43-07E97EEEA978.jpeg

Mike Sowsun
S110, SL1, 80D, 5D Mk III
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New Contributor
Posts: 4
Registered: ‎11-17-2020

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

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.

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Respected Contributor
Posts: 1,189
Registered: ‎01-25-2018

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

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

EOS 1DX M3, 1DX M2, 1DX, 5DS R, 1D M2, EOS 650 (film), many lenses, XF400 video
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Posts: 4
Registered: ‎11-17-2020

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

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

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Posts: 13,309
Registered: ‎12-07-2012

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

" ... 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. Smiley Sad

EB
EOS 1DX and 1D Mk IV and several lenses!
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