> I own an N90s, and I just noticed that there is a small black particle
> (perhaps dust) when I look through the view finder. Admittedly, this
> does not harm my pictures, but its bothering me. I looked on the mirror
> (didn't touch or attempt to clean the mirror), the lens, and the view
> finder, but am unable to locate the dust particle.
Is it in focus? If yes, it's probably on the focus screen (above the
mirror). I've had to brush/blow lots of bits off mine.
The focus screen is the only component you didn't mention, so perhaps
this is your problem.
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Andrew Donkin Nikon list administrator