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dissamble canon FD 85 1.2L
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PostPosted: Tue Aug 30, 2011 9:46 am    Post subject: dissamble canon FD 85 1.2L Reply with quote

Hi all,
I'm trying to fix my broken FD 85/1.2L.
I got the same problem like in trifox's post here :

-> forum.mflenses.com/canon-fd-85-f1-2-l-balls-everywhere-t37537,highlight,+balls.html

I'm stuck at the broken bearing ring but stell need to digg deeper as the aperture bracket is loose too, the focus ring is still scraping/ blocking and there is metal debri between the diaf and the front lenses.

So has somebody some experience to dissamble this lens totally ?
I'm really stuck and even canon service centers don't seem to have service manuals anymore for this lens.
How to get to the aperture ring itself from the back ?
How the remove the 3rd lens from the front and dissamble the lens like trifox did ?
any help or suggestions are welcome Wink


PostPosted: Tue Aug 30, 2011 11:41 am    Post subject: Reply with quote

I have disassembled my FD 85/1.2L not completly, but to some extend because I want to make the conversion full reversible.

Here my German description - not sure if it is absolute correct, and not sure if I get deeper than you:

Isnt the 3. lens from the front easily to disassemble from the front - I see you have a improvised spanner wrench.

Old big calipers are probably better:


PostPosted: Tue Aug 30, 2011 12:18 pm    Post subject: Reply with quote

Txs for the repley,

My improvised spanner wrench is indeed not so good but it got the first 2 rings off without any problems. The strange things is the 3rd ring doesn't have those 2cuts to use the spanner wrench with and they are far to deep and thin to use the rubber tire piece ( i tried trust me !)

I already found your site about the conversion before but german isn't my thing dude Wink Nice work for shure Wink
I still use a cheapo FD-EF convertor that I modified to get some better performance.

Anyway, it seem like that in trifox's post he got the focus ring/front of before he even got to the aperture blades. How did he do that Wink

PostPosted: Tue Aug 30, 2011 12:54 pm    Post subject: Reply with quote

Bossi wrote:
How did he do that Wink

Ask him.

PostPosted: Tue Aug 30, 2011 1:21 pm    Post subject: Reply with quote

If you use Google Chrome as your browser it will automatically ask if you want a page translating. It's not 100% accurate, but good enough to understand.

PostPosted: Sat Sep 03, 2011 12:39 pm    Post subject: Reply with quote

I've returned back from hols --

Please do not try to disassembly from the front..

Once bearing balls are out of the ring -- the lens is damaged and chance to get it back is close to ZERO..

Give me a few hrs ...


PostPosted: Sun Oct 09, 2011 2:09 pm    Post subject: Reply with quote

Okay, I finally had some time to handle this lens again, what a b*tch !!!
The good thing is , all balls are back where they should be, focus ring is back smooth again, aperture blades smooth and fast.
And I adjusted the focus to abit over infinity point.
The only thing what's not seems to been working is the aperture set lever. When I put the lens on the camera it takes the settings whats on the aperture ring and doesn't go full open, need to check this again , any tips ?

I also found a copy of the exploded view with parts number, not helpfull in dissambly/assembly but if somebody wants it give me a shout.

PostPosted: Tue May 14, 2013 12:03 pm    Post subject: Reply with quote

Hi all! I found this post and I think you could be my saviours! Very Happy
I have this lens and bought 2 different FD to Nex adapters but with both of them when I turn focus ring to infinity my lens focuses at about 5-6 meters. Beautiful images but I can't get further.

With the same adapters I am able to focus infinity with a 50mm FD lens so I don't think it is something related to adapters.
The lens make the click noise when attached, and it seems to be attached firmly. The shots are sharp but infinity equals to 6 meters
I tested that at about 0.85meters (the shortest focus) it focuses objects at around 80centimeters, but to focus objects at 2.5meters I have to turn the ring on about 5 meters.

An object at a distance of 5 meters focuses when I turn the ring on infinity. Every object past 5 meters are out of focus.

I've calibrated infinity on a tamron sp 35-210 (by turning top lens element), disassembled and cleaned many zuiko lenses and a 50mm fd lens. Never tried to open this 85mm diamond, I hope it is not necessary to mess everything to reach the right screw to calibrate infinity... How could I do that? Could you please tell me what to do or link any useful guide?

I thank you very much!