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 Fed 50mm f3.5 lens types

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Mark240590 Posted - Oct 12 2020 : 4:55:32 PM
Hey all,

Just wondering if any of you have a definitive list of the types of this lens ?

I am wanting to check which lenses I should have on my cameras are correct. But actually having noticed small differences with infinity stops too I’m quite interested about this topic.


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Vlad Posted - Oct 17 2020 : 1:31:30 PM
Jacques, thanks for this, it is very informative, these lenses are always overlooked so no one bothers to classify them.

Mark, you have a new task, create a classificator for these, we have a wiki catalog section just for that

Best regards,
Mark240590 Posted - Oct 17 2020 : 1:23:34 PM
Thank you very much, Its a shame as there seems to be quite a few variations of this lens. granted, its not the most exciting lens but still interesting nonetheless.

Kind regards,

Jacques M. Posted - Oct 13 2020 : 10:34:18 AM

Hi Mark!

A definitive list? Alas no... I know well the different Fed variations, but my knowledge of lenses is rather "light".
What I can say:

- For all the prewar cameras, the s/n of the body is more or less next to the lens one. Very close for the 1a-s, then less and less for the following ones. I have a difference of more than 5000 with a late 1b... Then, the difference stops increasing, and for the very late 1e, we can even find cameras with s/n > than the lens. I have no explanation...
- For the 1a-s, 1 turn focus (up to c. 6000), then 1/2 turn.
- All these lenses with the old scale of diaph: 3,5 - 4,5 - 6,3 etc.

- For the postwar lenses. First, no change with the previous ones. It seems that the new s/n begins at 00xx, perhaps 00001.
- Then we have (more or less simultaneously) a changing in the scale of diaph (new ones: 3,5 - 4 - 5,6 - 8 ...) and lenses are coated, towards the end of 1f 1st version (# 300000).
- Later, the s/n is engraved on the front of the lens flange, and the infinity lock is changed.

All that very roughly and by memory.
Don't hesitate to put more precise questions: I can make some researches (and I am not the only one!)

Amitiés. Jacques.

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