When I'm looking through the vewfinder, there is a dark grain covering my view. This is not the case with any of my other lenses, which includes a SMC Tak 50mm f1.4 among others. The darkness and, to a lesser degree, the grain are reduced when the Auto-Manual switch is over 'Manual.' The view gets dark as night when it the switch is over 'auto', but as it is on a K1000, that would be normail, I suppose.
The lens seems clean...not sure about fungus, as I'm nost sure what the does or looks like exactly, but the grain and darkness is uniform throughout the view, so I'm doubting that's the problem.
If you put the 35mm at f3.5 (full aperture) and the 50/1.4 at f/4 (a few clicks from full aperture) and set the A/M switch to M, the darkness of what you see through the viewfinder should be equal.
If you switch at A, both lenses are wide open, so the 50mm will be at 1.4 and the 35mm at 3.5. Then, the viewfinder will appear a lot darker with the 35mm lens as 8 times less light will enter the camera. (f/1.4 to f/2, half the amount; f/2 to f/2.8, half the amount again, so 4 times less than at 1.4, etc...) That should account for the difference in "darkness ans grain" you experience.
Andre
