| Author |
Message |
    
Daniel Powis
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, December 06, 2004 - 04:48 pm: | 
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Hi all,
I'd like to know how to open up this lens. The aperture mechanism is stuck to wide open, plus I'd like to do a bit of internal cleaning. Do I actually need a spanner to get it open ?
Any help appreciated.
Dan |
Jan Dvorak
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, December 06, 2004 - 05:57 pm: |
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Daniel,
Is this a breech lock mount, or FD (new) mount? The new FD mount lenses only close to working aperture when mounted on a camera, unless you simulate the effect - not an easy thing to do if you do not know what exactly to press and turn.
The older self-locking breech lock lenses will also ony close the set aperture when the locking collar is turned to lock the lens on the camera. Again - this can be simulated by pushing on a small spring-loaded contact inside the breech mount.
Just thought I gave these pointers before you tear into the lens.....
Good luck,
Jan |
Daniel Powis
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, December 07, 2004 - 06:55 am: |
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It is a Breech-lock lens (the 135/2.5 doesn't exist in new FD). And the aperture is really stuck wide open. I know about pressing the contact and then turnin the mounting ring. |
Richard Cook
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, December 17, 2004 - 11:13 am: |
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You take the lens apart from the front. Briefly:
Firstly you unscrew the disc that you see when you look at the front of the lens. It goes on the same thread as a filter would go inside the front and has the writing:
CANON LENS MADE IN JAPAN etc. on it.
If you can manage this it will expose some small screws which hold the lens barrel inside. |
