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FA: Canon FD 100 mm 1:2.8 - US NAVY version (fixed focus)
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PostPosted: Sat Jun 05, 2010 1:01 am    Post subject: FA: Canon FD 100 mm 1:2.8 - US NAVY version (fixed focus) Reply with quote
I'm selling this FD 100/2.8 lens:

Click here to see on Ebay

I believe it'll sell cheap, so I'll work with the buyer to make it ship as cheap as possible (or as fast as possible is the buyer so desires Smile )


PostPosted: Sat Jun 05, 2010 9:51 am    Post subject: Reply with quote
Interesting... does it actually have aperture blades and a focus helicoid, just all locked in place? Or is it a different design/construction without them?


PostPosted: Sat Jun 05, 2010 12:42 pm    Post subject: Navy Canon FD 100/2.8 Reply with quote
I picked up one of these a while ago, and did some disassembly. Though I did not complete restoring it because I didn't discover how the helicoid was locked and put it aside on a "pending lens project" shelf, the lens does have a functioning aperture mechanism (I had to unlock it) and a full helicoid.

If someone figures out what is locking the focus, I'd love to know!


PostPosted: Sun Jun 06, 2010 1:31 am    Post subject: Reply with quote
Scheimpflug wrote:
Interesting... does it actually have aperture blades and a focus helicoid, just all locked in place? Or is it a different design/construction without them?


It does. The helicoid is held by glue on the front of the lens; applying some MEK or other solvent should unblock it, but no guarantee. Aperture is functional; I was able to engage the levers move the aperture blades when this lens was mounted on an FD adapter. Unmounted, the blades stay half-open and won't move with any levers (I remember reading somewhere this is the way FD lenses behave).
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