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01-30-2021, 10:07 PM   #1
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Soligor 35mm F1:2 FD mount lens

Hi everyone! I have a troubleshooting question on this lens:
I inherited a Soligor 35mm F1:2 FD mount lens. I bought a Fotodiox Pro Lens Mount Adapter to make the FD mount lens fit on my Canon Rebel T7i.
I got the lens to fit on the adapter and the adapter to fit on the camera and took some pictures with it. I noticed some dust spots on the pictures, so I took the lens off the adapter. I thought there was an internal piece of glass in the lens that was causing the dust spots, since the outside glass was clean and the lens has been sitting unused for several decades in a box, so the dust could have creeped inside. I unscrewed the three small screws on the mount of the lens and took the metal ring off surrounding the aperture levers. Four tiny silver metal balls fell out along with four metal curved pieces.
After working on it for a little bit, I discovered that there either isn't internal glass or there isn't an easily accessible way to get to it, so I started on re-assembling the lens. The metal ring around the bayonets would not screw in correctly with the balls and curved metal pieces set in the slot where they are supposed to go, so I took them out and got the metal ring screwed back on. The aperture levers seemed to be working correctly even without all of the pieces inside, so then I tried fitting the lens back on the adapter and now it will not fit on correctly. It also will not fit correctly onto the original Canon film camera that the lens came on. With the FD mount lenses, there are three grooves on the lens to fit it onto the camera. The groove closest to the red alignment dot seems to be the one that is not fitting.The other two grooves fit the adapter in and leave no gaps:
There is a small silver metal piece on the lens that is meant to align with a groove on the adapter or camera. I can either get the piece to align with the groove on the adapter or the camera, but then the grooves on the lens don't line up with the adapter OR I can get the grooves on the lens to fit to the adapter and that small metal piece prevents the adapter from fitting snuggly on the lens.
I've search and searched and can't find any videos breaking down the soligor FD mount lens, only the Canon FD mount lens, which is different.
I know my first mistake was taking the lens apart, but now that the damage is done there, how can I get the lens to fit back on the adapter?

01-31-2021, 12:12 AM   #2
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QuoteOriginally posted by HPB_33 Quote
. . .

I know my first mistake was taking the lens apart, but now that the damage is done there, how can I get the lens to fit back on the adapter?

Welcome, HPB_33.

It sounds as though you have a real challenge on your hands. Can you post some photos of your situation?
How to upload / link photos - BEGINNERS START HERE - PentaxForums.com

Also, are you certain the dust spots aren't on your camera's sensor?

You mentioned Soligor's FD mount is different from Canon's FD. I have two 1970s FD mount lenses which were made by Tokina - the same company that made your 35mm f/2.0. Do my mounts look similar to yours?
(Click the photo to see a larger version.)


01-31-2021, 05:55 AM   #3
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CFD is a pernickety mount. If I was you, i would be tempted to carry on what has been inadvertently started, remove the cfd mount and try to attach a M42 to EOS adapter (or an eos bayonet off a junk lens) in its place, thus converting to eos.With a bit of luck that will also eliminate the 2mm difference in registration distance between fd and eos. Google eg disassemble canon FD -- there is quite a bit of info around.
It's basically a pain trying to adapt cfd to anything other than mirrorless - which is why certain lenses (eg my "bokina" 90mm macro) are often more cheaply obtainable in this mount.
01-31-2021, 07:13 PM   #4
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Thank you! Your mount looks similar to mine. I have attached pictures so you can see the problem. The main issue is that, once I took the black metal piece off that surrounded the lens aperture levers and took out the ball bearings (I am assuming that's what they are called?) and then tried to put them back in, the metal piece won't fit back on around the aperture levers and screw in tightly, unless I remove the ball bearings again. And now the whole lens won't fit back on the adapter


QuoteOriginally posted by .a.t. Quote
Welcome, HPB_33.

It sounds as though you have a real challenge on your hands. Can you post some photos of your situation?
How to upload / link photos - BEGINNERS START HERE - PentaxForums.com

Also, are you certain the dust spots aren't on your camera's sensor?

You mentioned Soligor's FD mount is different from Canon's FD. I have two 1970s FD mount lenses which were made by Tokina - the same company that made your 35mm f/2.0. Do my mounts look similar to yours?
(Click the photo to see a larger version.)



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02-01-2021, 02:32 AM   #5
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QuoteOriginally posted by HPB_33 Quote
Thank you! . . .

You're welcome, but after checking my mounts, I think they're built differently from yours.
On mount #1 I disassembled more than on #2, but neither of them had the parts you're trying to replace.

Unless you see something helpful in the photos, I don't know what else to suggest except persistence.


Here they are:


#1


#2
02-01-2021, 03:36 AM   #6
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Never tried to take a lens apart, so no experience, but in the images you have posted, the 'adapter' (blue item ?) looks to be slightly skewed - could this be because the mount has been re-attached in the wrong orientation ? Don't know if this is possible, but could you try rotating the mount (assuming the screw holes line up) and seeing whether that makes any difference ? Good luck anyway.
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