It would only be true if there was a couple of stops worth of dirt on the
mirror in
the first place so the question of affecting the meter of a 4ti mirror doesn't
arise
IMO.
The safest thing to clean a mirror with may well be Ppticlean, which Lee
Hawkins
recently gave us a atest report on.
Giles
Doug Cooper wrote:
> Okay, last (slightly philosophical) question regarding the cleaning of
> mirrors. ROR cleaning fluid advertises an increase in light transmission
> of up to a couple of stops. a) is this bull? and b) if you clean an
> OM4t's mirror with ROR, does that mean more light can reach the meter,
> thus upsetting the calibration?
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