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Message |
    
Wsboyd
Tinkerer
Username: Wsboyd
Post Number: 51
Registered: 09-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, October 24, 2007 - 12:04 pm: | 
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My 'new' from eBay lens, a mint 5.6 Canon FD (new type) 100-200 zoom has a Foreign Object stuck on the inside of what seems to be the front lens (the glass that dos not move when you push-pull the zoom).
The FO appears to be a shiny, dark flake about 3~4mm's in length. It casts a shadow.
I have bought a rubber lens tool of the correct size, but I now hear that the 'new' FD lenses don't unscrew like others do.
Any step-by-step instructions would be appreciated as I've never done this before. |
Glenn
Tinkerer
Username: Glenn
Post Number: 201
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, October 24, 2007 - 06:52 pm: |
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I presume you are referring to the front 'name' ring. This is held by 3 or 4 spots of adhesive on many FDn lenses and you have to lever it out. I use a thin, curved piece of metal made from an old craft blade. A thick pad of lens cleaning cloth is placed on the lens, the tool is then inserted between lens and ring and used to pry the ring free. Do not use a sideways movement, this will damage the inner edge of the ring. Just push the lever down onto the lens - the ring easily comes free. Re-attach the ring with a couple of dabs of contact adhesive.
I do not have my Canon service manuals to hand, but normally you will find front element securing ring or fastenings under the name ring. |
Wsboyd
Tinkerer
Username: Wsboyd
Post Number: 52
Registered: 09-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, October 26, 2007 - 01:12 pm: |
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Thanks !
I never would have thought to insert the lever next to the lens. I would have tried between the barrel & 'beauty / name' ring.
I assume the front element then unscrews in an simple & obvious way ? |
Glenn
Tinkerer
Username: Glenn
Post Number: 204
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, October 26, 2007 - 06:18 pm: |
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It should be obvious, but I have not worked on this lens. If it does not look obvious, email me and I will dig out the repair manual - still boxed up after a house move. |
Aaron
Tinkerer
Username: Aaron
Post Number: 21
Registered: 10-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, October 27, 2007 - 02:08 am: |
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The front name ring is screwed in, and it also holds the front element. |
