qqphotos
Well-known
Oh, god. I'm getting flashbacks to the last time I tried dealing with this.
There's a couple of adjustment points/methods on the Contax/Kiev rangefinder. I don't know if it's different on the IIa, but I can't imagine it changed a lot.
The "easy" fix is the one below the RF window, accessible by removing the front plate. That shifts the rangefinder mechanism side-to-side and will give you a small amount of adjustment for the whole range of travel. Unfortunately, if you're in focus at one end but not the other, this won't be enough.
The more substantial fix is to remove the entire top of the camera and rotate the RF prism/lens at that end. Note that the adjustments for this are below the long prism that brings the image over to the viewfinder, so adjusting this necessitates removing the prism, making an adjustment, and replacing the prism to find out if you got it right.
Usually, a combination of those two should bring everything into line - if you're lucky.
The ninth circle of hell is if the lens mount has been removed and the gearing between the focusing helical and the rangefinder mechanism has changed. Now you've got to reposition that and adjust the other two parts of the rangefinder mechanism until everything agrees. Good luck with that - it's a constant process of removing parts, making small adjustments, putting parts back, checking both ends of the scale, removing parts, making more adjustments, and so on.
I can see why so few people work on these things. They're a nightmare.
Christ, yeah I see what you mean! It doesn't help that half what you read on old forum posts is "oh no, there's only the gearing and no other adjustments" and half are as you describe. I didn't realize you could remove the front plate without to much added misery though, I suppose it's worth a look just in case. On the other hand since it does focus more or less right, I could just leave well enough alone. Just kidding, I can't! It's a personality defect! 🙂