This is a Russian made copy of a Leica and even though it is a copy it is very solidly made.   If you want to try out rangefinder style cameras with interchangeable lenses these are a good introduction and have some following in their own right but can still be found pretty cheap.  At the time there were a range of Russian copies such as Zorki and Kiev.

The Fed-3 is the third (ish) version of the series and the went on to 4, 5, 6 etc.  The 3 had a few versions (two main), the first (a) keeping the body from the Fed-2 which had a stepped top as this one does and the second version (b) with the flat top; with a couple of variations on both of these.

I have two lenses for this camera an Industar 52mm f2.8 (as in the pictures) and a Jupiter 50mm f1.5 , both are very good and I have used the Jupiter on my Digital Olympus Pen-F with good results (though the focal length is a little long for general use).  These are with the M39 mount or LTM (Leica Thread Mount) and can be used on a wide range of cameras from the time.

I have the original case which is similarly as solid as the camera.  Unlike some other cases you can’t separate it into two parts leaving just a half case around the camera; the other half is always attached and does get in the way a little.  I have bought a second one with the intention of cutting off the other half so I can use it more easily.

It’s not the easiest thing to operate if I’m honest the shutter speed settling is combined with the film wind on.  Once you get used to that it’s pretty straightforward.

Make Model Film/format Year Lens Shutter Aperture
Fed (a) 3a 35mm Rangefinder 1961 52mm 1:2.8 (plus 50mm 1:1.5) B, 30, 1, ½, ¼, 1/8, 1/15, 1/60, 1/125, 1/250  and 1/500 sec f2.8-22  (plus 1.5-22)

I’ve shot one film through this (an expired Kodachrome that came with the camera), here are a couple of examples straight from the scanner; unfortunately a scratch got onto it.