It would make sense that your outdoor daylight shots would be reasonably sharp - if your rangefinder were out of alignment, you're still using a small aperture (large aperture number, like f11, f16, etc) and you're taking photos of things that are farther away - depth-of-field takes care of focusing errors because everything from say 20 feet to infinity is 'in focus' or close enough. This would tend to cover any focusing errors.
Indoors, it is a different story - you use slower shutter speeds, larger apertures (smaller numbers, like f1.4, f1.7, f2.8, etc). Close distances shorten DOF effects, and open apertures even more so. When you're shooting a 45 or 50mm lens wide open at a subject only a few feet away, there is very little margin for error. So, your rangefinder could be off just a tiny bit - and that would still end up giving you fuzzy images. The question here - is ANYTHING in focus in a photo where you are seeing this fuzziness? Sometimes it helps if you can look critically at things in front of or behind your subject in your photo. For example, I took a photo of my wife, she came out all fuzzy. But she was standing in the kitchen at the time, and the dishes behind her were in focus, even though I had intended to have HER be in focus. So that was a definite focusing / rangefinder error. Either I didn't focus well enough, or the rangefinder mechanism was out of whack.
With the GSN, though, there is one other thing to consider. The Electro rangefinders set their own shutter speed. Indoors without flash, you're going to have slower shutter speeds set for you. The fuzziness you see could be blur caused by camera motion or shake - shutter speed too slow to handhold, in other words. The way to test that would be to take a photo or two using a tripod (or an improvised tripod) and make sure the camera DOES NOT MOVE when you snap the photo. Most people cannot hand-hold a camera at less than 1/30 - or 1/15 of a second without blur or shake. Some can get down to 1/8 (I can since I gave up smoking, but it aint easy and I cant ALWAYS do it), but most can't.
Last possibility - is this fuzziness you're seeing, or is it blur? If the shutter is 'dragging' at slow speeds, you could be getting motion blur instead of fuzziness caused by the camera not being in focus. Try listening well to the shutter when it fires indoors without a flash. Get used to hearing it shap open and closed. Look down the lens barrel and watch it open and close (without film, of course). if it closes slowly instead of with a 'snap' then there's your problem.
Hope this helps,
Best Regards,
Bill Mattocks
