Some thoughts on viewfinder problems
Having read various observations about viewfinder patch and frameline skew I decided to take a shot of my back door. The result was about a degree and a half skew down to the right! I took a few more shots of rectangular objects. Same! So I got the tripod out and did some tests. First, under most viewing angles my viewfinder patch appears slightly rotated with respect to the frame lines. I observed closely that it in fact appears slightly non-rectangular and larger vertically on the right side. On the tripod, facing a bookcase with a 50mm Nokton, I shot a series of frames lined up respectively on the top line, left line, and right line. What I discovered is that if I tried to use the left hand line of the frame the result is a very slight skew. If I align carefully on the top or the right side the camera is dead on! What I suggest is the following: First, the parallax correction mechanism and the optics somehow distort the image slightly, and perhaps has something to do with the skew. Second, the handheld right-down skew is none other than my old habit of moving the camera when pressing the shutter. This is not to say that some cameras aren't significantly mis-aligned, but before shipping it back check it on a tripod. I've moved my soft release to the R D1. By the way, focus on the camera is spot on at f1.5 close up.