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JerryMK
Joined: 16 Apr 2009
Posts: 98
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 Posted: Mon Jun 21, 2010 5:01 pm Post subject: Kiron 105mm f2.8 Canon FD mount diafragm not changing... |
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JerryMK wrote:
Hi, anyone familiar with the Kiron 105mm f2.8 Canon FD mount version? I just got this lens and whatever I try the diafragm in locked position does not adjust when turning the diafragm ring. The iris stays only set at what seems something like 11 or 16.
However when I release the diafragm lock it goes wide open so the iris is not stuck.
Any ideas? help is appreciated!!! |
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Rusty
Joined: 06 Nov 2008
Posts: 435
Location: Mosselbay, South Africa
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| Posted: Mon Jun 21, 2010 7:10 pm Post subject: |
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Rusty wrote:
Hi as far as i know, the lens must be mounted and locked before the aperture works
Try to mount first and then check from the front of the lens if it opens correctly while turning the aperture ring
Cheers
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Daniel |
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JerryMK
Joined: 16 Apr 2009
Posts: 98
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| Posted: Mon Jun 21, 2010 8:24 pm Post subject: |
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JerryMK wrote:
Hi Daniel, thanks. That is what I am doing. But when mounted and locked the iris stays in one position while moving the aperture ring. If mounted and unlocked, the iris just goes wide open.  |
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Excalibur
Joined: 19 Jul 2009
Posts: 5019
Location: UK
Expire: 2014-04-21
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| Posted: Mon Jun 21, 2010 9:51 pm Post subject: |
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Excalibur wrote:
| Rusty wrote: |
Hi as far as i know, the lens must be mounted and locked before the aperture works
Cheers |
That is correct, unless you know the "dodge" with the lens off the camera.
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Canon A1, AV1, T70 & T90, EOS 300 and EOS300v, Chinon CE and CP-7M. Contax 139, Fuji STX-2, Konica Autoreflex TC, FS-1, FT-1, Minolta X-700, X-300, XD-11, SRT101b, Nikon EM, FM, F4, F90X, Olympus OM2, Pentax S3, Spotmatic, Pentax ME super, Praktica TL 5B, & BC1, , Ricoh KR10super, Yashica T5D, Bronica Etrs, Mamiya RB67 pro AND drum roll:- a Sony Nex 3
.........past gear Tele Rolleiflex and Rollei SL66.
Many lenses from good to excellent. |
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Rusty
Joined: 06 Nov 2008
Posts: 435
Location: Mosselbay, South Africa
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| Posted: Tue Jun 22, 2010 7:45 am Post subject: |
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Rusty wrote:
| JerryMK wrote: |
| Hi Daniel, thanks. That is what I am doing. But when mounted and locked the iris stays in one position while moving the aperture ring. If mounted and unlocked, the iris just goes wide open. |
hmmmmm.... This will probably not be of much help but as far as i can remember from a fd conversion on a lens a while ago
There are2 mechanisms controlling the aperture , a long lever that closesthe aperture when the lens is mounted (fine in your case) and then a smaller lever that works against spring tension from the aperture itself to close it down from the open position for f stop adjustment by the ring (disengaged or stuck ?)
Maybe only some miss- alignment some where if the mount was removed at some stage by a seller?
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Daniel |
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JerryMK
Joined: 16 Apr 2009
Posts: 98
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| Posted: Tue Jun 22, 2010 7:32 pm Post subject: |
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JerryMK wrote:
Rusty thanks for thinking with me. I tried "loosing" that lever by pulling it and let the spring tension pulling it back hoping it to release the iris to the choosen aperture but no luck whatsoever.
I am afraid I can not solve this myself and will have to go to a repair center  |
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Rusty
Joined: 06 Nov 2008
Posts: 435
Location: Mosselbay, South Africa
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| Posted: Tue Jun 22, 2010 7:56 pm Post subject: |
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Rusty wrote:
Yep...I think that is a wise move
I know one thing for sure, the fd mount mechanism is ridiculously complicated and VERY difficult to re- assemble
I have messed up a couple in the past 
Good luck !
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Daniel |
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trifox
Joined: 14 May 2008
Posts: 3614
Location: UK
Expire: 2014-05-29
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| Posted: Tue Jun 22, 2010 8:04 pm Post subject: |
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trifox wrote:
Dear JerryMK
Where you are located?
Stan
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JerryMK
Joined: 16 Apr 2009
Posts: 98
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| Posted: Tue Jun 22, 2010 8:04 pm Post subject: |
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JerryMK wrote:
| trifox wrote: |
Dear JerryMK
Where you are located?
Stan |
Hi Stan, I am in the Netherlands. |
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