Request for advice: KMZ multi-finder problem

[Richbuckle]

Hello everyone.

I recently acquired one of these. A right orientated one, but that's fine - I don't find it blocks my Zorkis' speed dials really. Took it apart to clean everything: all seemed in order, everything as it should be. All of the focal lengths are relatively bright, shiny and in-focus now. Except the 50mm. For some reason, this is blurry as mush and not really usable. Shame, because I'm a glasses wearer, and I mostly got it because I wanted more eye relief than the Zorki's finder gives.

I've already tried putting the 50mm lens in the other way round. I'm guessing it's not a problem with the prisms, as all the rest of the focal lengths are good. It's like the lens is the wrong distance in front of the prism lens. No visible flaws in the 50mm lens. I've tried tightening the central screw as much as I can.

Help!

Cheers in advance,

Richard.

Looking at it again, it's reasonably sharp in the centre, but quickly falls off to sludge - makes me almost think the lens could be warped.

[Richbuckle]

No replies yet - this is going to be a very one sided thread! I managed to fix the problem. The 50mm lens just wasn't recessed enough. I glued it to the fixing mount so that I could then adjust it til it was focusing correctly. Works fine! Tiny bit more fuzz at the edge of the frame than, say, the 35mm, but enjoyable enough to use. If I'd been cleverer, I might even have rustled up a shim, but who's got enough metal rings to have one the perfect diameter and thickness?