Screw-in filters for FED-/Zorki-1?

[tenebrae]

The regular push-on filters for the FED-1 and Zorki-1 are somewhat cumbersome, as you have to remove them in order to (re)set the aperture. There is, however, a thread right next to the edge of the lens.

Does anyone use this thread to screw in a filter?

What is the thread size (rather tiny, looks like a 19 or 20 mm?).


BTW, I'm really enjoying shooting with my Zorki-1 and FED-1. You just put them in your jacket pocket (in a small plastic bag, for protection against dust and lint) and go! And then: the funny faces some people make when they see the camera....

 

[back alley]

what lens?

 

[tenebrae]

On the Zorki-1, it's an Industar-50 1:3,5, and on the FED-1 it's a standard FED 1:3,5.

 

[fotosniper]

yea I see that thread on mine too..looks really small and can't say that I have seen any advertised n Ebay or wherever..maybe telescope eyepiece filters may come in small sizes.I believe telescope users use filters too,to improve contrast when viewing..it's a thought yea?

 

[kiev4a]

Don't know what the thread size is on the I-22 or I-50. Ive never seen anything but clamp-on filters for those lenses. Maybe some screw-ons were made but I've never seen any reference to a Russian model. They may have included the threads because the Leica lens had them.

 

[fotosniper]

Thread is there so you can remove the front element of the lens by unscrewing the black ring with the notches in..yep?..never intented as a thread for filters I suspect, but getting one that may fit would be useful.

 

[tenebrae]

I figured it would be a "construction" thread. To complicate things: the thread is not straight but narrows down a bit. Screw-in filter threads usually are straight.

 

[DaveP]

I i think those are 21.5mm threads. I dont know that they were intended for filters only lens removal/assembly. However, I found an old Ednalite filter adaptor that says 19-23.5 mm on it and it screws right in! Its a series 4 though ,but it doesnt vignette. Ive seen the thread size listed somewhere.................

 

[Nickfed]

My physics teacher at school had a fixed lens Leica with a tiny filter on the front. I can't remember who made it.

 

[tenebrae]

I found them. For the Leica Elmar 1:3,5 50 mm collapsible lenses, and for the Argus C3. They should fit on the Russian copy-Elmar as well. Apparently, these are 19 mm filters.