Bob Meyer wrote:
>Yes, it's certainly possible to clean a mirror. The
>real issue here is that knocking the mirror even
>slightly out of alignment can screw up your AF....
Bob, et al,
How easy is it to knock the mirror out of alignment (on any of the EOS
bodies)? Certainly I would not apply firm pressure such as pressing your
finger behind lens paper (or the like) and rub. But how 'bout using a soft
Q-tip moistened with isopropyl alcohol, applying only the slightest
pressure... would that be enough to cause misalignment? BTW, your method
sounds like a good preventive measure which I plan to follow.
Also, forgive my ignorance but I'm new to EOS and AF systems, how exactly
does a misaligned mirror throw off auto-focus? I imagine that a misaligned
mirror renders the image in-focus thru the viewfinder (with manual
adjustment) but out of focus on the film.
Thanks!
Charles C.
>
>Date: Fri, 27 Jul 2001 12:32:05 -0700 (PDT)
>From: Bob Meyer <[EMAIL PROTECTED]>
>Subject: Re: EOS Cleaning the Mirror
>
>- --- Tim Munro <[EMAIL PROTECTED]> wrote:
> >
> > ----- Original Message -----
> > From: Charles Cabaniss <[EMAIL PROTECTED]>
> > > Has anyone tried this themselves and to what
> > effect? [I know that a dirty
> > > mirror has no bearing on image quality.] I ask
> > because I've heard that the
> > > mirror should not be touched by anyone but a
> > qualified tech. Are EOS
> > mirrors
> > > so much more delicate than FD? If so, why?
> >
> > Hi Charles, For regular cleaning I use a blower
> > brush to remove dust and
> > floaties off the mirror. If there is something
> > stubborn there that bothers
> > me I wipe it over using an anti-static lens cloth,
> > taking care not to put a
> > finger on it. I have used this method to clean
> > mirrors and prisms for years
> > without a problem. I've seen others who attack dirty
> > mirrors much more
> > vigorously and concluded that they are probably not
> > as delicate as commonly
> > preached (although I'm still very careful).
>
>Yes, it's certainly possible to clean a mirror. The
>real issue here is that knocking the mirror even
>slightly out of alignment can screw up your AF. I'd
>suggest being diligent about keeping a lens or body
>cap on at all times, and shielding the body from wind
>and dust when changing lenses. Clean it frequently
>with a blower brush, to prevent the accumlutaion of
>crud, rather than infrequently with lens tissue or the like.
>
>=====
>Bob Meyer
>I wish I knew what I know now, when I was younger...
>
>http://www.meyerweb.net/epson
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