From: Moose
>> Sorry to hijack the thread, but I can see a lot of hair/dust/'stuff' on
>> the mirror when I change lenses. Is it safe to just brush this or use a
>> lens cloth to clean it?
>
> 1. It has no effect whatsoever on the pictures you take,as the mirror is
> up out of the way then.
>
> 2. Unless there is an awful lot of it, it has no effect on your view
> through the viewfinder, as it is not in focus.
>
> 3. Dust that is staying peacefully on the mirror and trapped by it while
> the shutter is open is not flying around loose , through the shutter and
> onto the sensor.
>
> Thus, the best policy is one of little or no intervention.
Thanks Moose, and also someone else who suggested a Swiffer but whose email I
accidentally deleted when working my way through the other 200-odd this
morning! I don't think the 'matter' on the mirror is visible through the
viewfinder - it's just that it annoys me to see it there every time I change
the lens! I'll just leave it alone for the moment :-)
r.
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