Wall warts; was: hams on classiccmp
ard at p850ug1.demon.co.uk
Fri Jan 23 15:20:57 CST 2009
> On 22/01/2009 22:39, Paul Koning wrote:
> > Then there are fun details like this one: ethanol is a nice harmless
> > cleaning fluid for many things, including most plastics. But it will
> > turn plexiglas matte.
> And never use IPA to clean the focus screen in your SLR camera. I had
> to have a Pentax dismantled and the screen replaced after that one.
Thad depends on what the focussing screen is made of. Some of my cameras
are old enough to have real ground-glass screens, which are not attacked
by any common cleaning solvents. But the plastic ones used in more recent
cameras are very easy to damage. Having just looked at a Spotmatic, I can
confirm the focussing screen in that is plastic, and that it comes out
upwards arter removing the top plate and pentaprism, so it's not trivial
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