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marcusBMG
Joined: 07 Dec 2012
Posts: 1298
Location: Conwy N Wales
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 Posted: Mon Mar 09, 2015 2:35 pm Post subject: Canon FD 300mm f5.6 dissassemble? |
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marcusBMG wrote:
Just acquired one of these cheaply. Later type mount, figured out it is working once I got the adapter on. But pervasive fungus through the lens. Plastic focus sleeve, internal focussing, no obvious joint or screws - any insight on how to get at the rear optics in particular appreciated.
UPDATE just figured the hole in the hood is an access hole to get at three grub screws to detach the front end. The front end is a unit holding three elements. To unscrew it once I had slackened the grub screws I used my dremel to make two slots for my lens spanner, because the hood gets in the way of gripping it effectively.
_________________
pentax ME super (retired)
Pentax K3-ii; pentax K-S2; Samsung NX 20; Lumix G1 + adapters;
Adaptall collection (proliferating!) inc 200-500mm 31A, 300mm f2.8, 400mm f4.
Primes: takumar 55mm; smc 28mm, 50mm; kino/komine 28mm f2's, helios 58mm, Tamron Nestar 400mm, novoflex 400mm, Vivitar 135mm close focus, 105mm macro; Jupiter 11A; CZJ 135mm.
A classic zoom or two: VS1 (komine), Kiron Zoomlock...
Last edited by marcusBMG on Tue Mar 10, 2015 3:09 pm; edited 1 time in total |
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Jesito
Joined: 24 Aug 2007
Posts: 5753
Location: Olivella, Catalonia, (Spain)
Expire: 2015-01-07
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| Posted: Mon Mar 09, 2015 6:50 pm Post subject: |
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Jesito wrote:
Hi Markus,
I got two of them with the same problem: aperture doesn't work properly, it seems fixed at around f/5.6.
I opened one of them by the mount side, it's easy. I was able to remove the aperture long levers but I didn't see where the failure is.
I also noticed the hole in the hood, but didn't see the screw heads. Are them visible with the hood extended?.
Regards,
Jes.
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Jesito, Moderator 
Jesito's backsack:
Zooms Sigma 70-300, Tamron 35-135 and 70-210 short, 70-210 long, 28-70 CF Macro, 35-70, 35-80, Vivitar 70-210 KA, Tamron 70-250.
Fixed Industar-50, , Tamron 24mm, Tamron 135mm, Sands Hunter 135mm, Pancolar 50mm, Volna-3, many Exakta lenses
DSLR SIGMA SD9 & SD14, EOS 5D, Sony A700 and NEXF3, Oly E-330, E-400, E-450, E-1
TLR/6x6/645 YashicaMat, Petri 6x45, Nettar, Franka Solida, Brilliant
SLR Minolta X300, Fuji STX II, Praktica VLC3, Pentax P30t, EXA500, EXA 1A, Spotmatic(2), Chinon CM-4S, Ricoh, Contax, Konica TC-X , Minolta 5000, 7000i, 3Sxi, EOS 500 and CX
Rangefinders Chinon 35EE, Konica C35 auto, Canonet 28, Yashica Lynx, FED-2, Yashica electro 35, Argus C3 & C4, Regula Cita III, Voigtlander Vitoret (many), Welta Welti-I, Kodak Signette 35, Zorki-4, Bessa-R & L, Minolta Weathermatic, olympus XA2
Compact Film Konica C35V, Voigtlander Vitorets, Canon Prima Super 105, Olympus XA2 and XA3
Compact Digital Olympus C-5050, Aiptek Slim 3000, Canon Powershot A540, Nikon 5200, SIGMA DP1s, Polaroid X530, IXUS55, Kodak 6490, Powershot G9 and G10
CSCCanon EOS-M, Samsung NX100 and NX210, Lumix G5, NEX-F3 |
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marcusBMG
Joined: 07 Dec 2012
Posts: 1298
Location: Conwy N Wales
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| Posted: Tue Mar 10, 2015 12:01 am Post subject: |
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marcusBMG wrote:
Jesito you have to pull the hood back about a cm - seek and you shall find 
As far as the aperture goes, when not mounted or attached to an adapter like my M4/3 to cfd the aperture is closed down and rotating the aperture ring does nothing. With the adapter on the iris opens and closes normally with the rotation of the aperture ring. The adapter needs a lever to push the triangular aperture lever on the mount. Actually my adapter mounts on this more easily than on some other cfd lenses I have had with the older "2 ring" mount.
I had a go at the mount. 3 small screws to take off the top silver rim, then the inner assembly can be winkled out - two long aperture lever connections to pull past baffles etc. The I spent an hour and a half figuring out if it would go back together again and work - it did eventually.
I'll proceed further next time.
_________________
pentax ME super (retired)
Pentax K3-ii; pentax K-S2; Samsung NX 20; Lumix G1 + adapters;
Adaptall collection (proliferating!) inc 200-500mm 31A, 300mm f2.8, 400mm f4.
Primes: takumar 55mm; smc 28mm, 50mm; kino/komine 28mm f2's, helios 58mm, Tamron Nestar 400mm, novoflex 400mm, Vivitar 135mm close focus, 105mm macro; Jupiter 11A; CZJ 135mm.
A classic zoom or two: VS1 (komine), Kiron Zoomlock... |
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Jesito
Joined: 24 Aug 2007
Posts: 5753
Location: Olivella, Catalonia, (Spain)
Expire: 2015-01-07
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| Posted: Mon Mar 23, 2015 2:46 pm Post subject: |
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Jesito wrote:
| marcusBMG wrote: |
Jesito you have to pull the hood back about a cm - seek and you shall find
As far as the aperture goes, when not mounted or attached to an adapter like my M4/3 to cfd the aperture is closed down and rotating the aperture ring does nothing. With the adapter on the iris opens and closes normally with the rotation of the aperture ring. The adapter needs a lever to push the triangular aperture lever on the mount. Actually my adapter mounts on this more easily than on some other cfd lenses I have had with the older "2 ring" mount.
I had a go at the mount. 3 small screws to take off the top silver rim, then the inner assembly can be winkled out - two long aperture lever connections to pull past baffles etc. The I spent an hour and a half figuring out if it would go back together again and work - it did eventually.
I'll proceed further next time. |
Thanks for the info. Yes, I try it mounted on a NX adapter, so the aperture should work (and doesn't).
I also disassembled the mount and remounted it. It took me a lot of tries, but finally it was in place again... keeping the problem.
These days I'm doing some lens cleanup, I'll try again to see if I can understand how this lens works.
Kind regards.
Jes.
_________________
Jesito, Moderator
Jesito's backsack:
Zooms Sigma 70-300, Tamron 35-135 and 70-210 short, 70-210 long, 28-70 CF Macro, 35-70, 35-80, Vivitar 70-210 KA, Tamron 70-250.
Fixed Industar-50, , Tamron 24mm, Tamron 135mm, Sands Hunter 135mm, Pancolar 50mm, Volna-3, many Exakta lenses
DSLR SIGMA SD9 & SD14, EOS 5D, Sony A700 and NEXF3, Oly E-330, E-400, E-450, E-1
TLR/6x6/645 YashicaMat, Petri 6x45, Nettar, Franka Solida, Brilliant
SLR Minolta X300, Fuji STX II, Praktica VLC3, Pentax P30t, EXA500, EXA 1A, Spotmatic(2), Chinon CM-4S, Ricoh, Contax, Konica TC-X , Minolta 5000, 7000i, 3Sxi, EOS 500 and CX
Rangefinders Chinon 35EE, Konica C35 auto, Canonet 28, Yashica Lynx, FED-2, Yashica electro 35, Argus C3 & C4, Regula Cita III, Voigtlander Vitoret (many), Welta Welti-I, Kodak Signette 35, Zorki-4, Bessa-R & L, Minolta Weathermatic, olympus XA2
Compact Film Konica C35V, Voigtlander Vitorets, Canon Prima Super 105, Olympus XA2 and XA3
Compact Digital Olympus C-5050, Aiptek Slim 3000, Canon Powershot A540, Nikon 5200, SIGMA DP1s, Polaroid X530, IXUS55, Kodak 6490, Powershot G9 and G10
CSCCanon EOS-M, Samsung NX100 and NX210, Lumix G5, NEX-F3 |
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marcusBMG
Joined: 07 Dec 2012
Posts: 1298
Location: Conwy N Wales
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| Posted: Sun Mar 29, 2015 10:40 pm Post subject: |
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marcusBMG wrote:
Thought I'd solicit some more input with a question posted in the FD club on Photo.net
http://photo.net/canon-fd-camera-forum/00dCyq
Michael Broome replied with a SOOL assessment! IF 300's lenses need special tools etc to take apart. 
_________________
pentax ME super (retired)
Pentax K3-ii; pentax K-S2; Samsung NX 20; Lumix G1 + adapters;
Adaptall collection (proliferating!) inc 200-500mm 31A, 300mm f2.8, 400mm f4.
Primes: takumar 55mm; smc 28mm, 50mm; kino/komine 28mm f2's, helios 58mm, Tamron Nestar 400mm, novoflex 400mm, Vivitar 135mm close focus, 105mm macro; Jupiter 11A; CZJ 135mm.
A classic zoom or two: VS1 (komine), Kiron Zoomlock... |
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