hello, i am not sure if this should go to 'classic manual cameras' or here in to the nikon subforum. so, i have a nikon n2000, two of them. I have 50mm f1.8, and chinar 28mm f2.8. both work fine. i recently obtained spiratone 20mm f2.8, so the issue is, when it's on camera, any of them, and i put the focus to infinity sign, then in the viewfinder, the lines are still broke by the line in the circle. you know, you see a circle and an intersecting line, and this line divides the lines you see, and if the line in your scene is broken by the line in the lens, then the focus is not on that object the line belongs to. you need to rotate the focus ring so that the line of the object you are aiming to keep in focus become uninterruptible. so, with this spiratone, at least on my cameras, this line is always broken. my impression is, this spiratone lens have been made specifically for nikon. what do you think? is it normal? does it mean the lens are not calibrated? i did not have the results yet, but when i keep the focus on infinity, and shoot buildings, does that mean the building will be out of focus, because its lines are interrupted in the viefinder? or may be on another nikon camera the lens will work okay? thank you.