John,
You are right. A very useful rule.
Thank you!
Regards,
Jose Elbert
Rosario, Argentina
Fernando,
Es un método simple y práctico, no?
Siempre se aprende algo útil.
Un cordial saludo
Jose
----- Original Message -----
From: "John Hermanson" <omtech@xxxxxxxxx>
To: <olympus@xxxxxxxxxx>
Sent: Wednesday, September 01, 2004 5:06 PM
Subject: [OM] Re: OM Focusing Screen Cleaning
>
> Focus on a spot of dust as you look through the eyepiece. Then move your
eye
> slightly from side to side, staying focused on the dot. If the dot
changes
> position in relation to a point on the focus screen , then it is on the
> prism. If it stays in the same spot relative to the focus screen, then
> that's where it is.
> _________________________________
> John Hermanson
> Camtech Photo Services, Inc.
> 21 South Lane,
> Huntington, NY, 11743-4714,
> 631-424-2121, www.zuiko.com
> _________________________________
> ----- Original Message -----
> From: "Fernando Gonzalez Gentile" <fgnzalez@xxxxxxxxxxxxx>
> To: <olympus@xxxxxxxxxx>
> Sent: Wednesday, September 01, 2004 12:53 PM
> Subject: [OM] Re: OM Focusing Screen Cleaning
>
>
> > on 1/09/2004 11:19, John Hermanson at omtech@xxxxxxxxx wrote:
> >
> > > Specs of dust may also be on the surface of the camera prism,
> > I was writting a reply just to warn about this possibility, but a sudden
> > backout sent my answer to nowhere.
> > It is sometimes difficult to determine where the spot is. Recently, once
I
> > had ruled out it was on the focusing screen, I couldn't see it on the
> prism
> > surface, looking through the mirror chamber using good light and a big
> > magnifying glass.
> > Looking through the viewfinder without the screen, the black spot became
> > tranparent. When putting the screen into the mirror chamber, whatever
its
> > position, it became black and visible again. I guess I removed it using
> the
> > brush that comes with the focusing screen, since I have no geese around.
> It
> > was a rather stubborn black spot, probably coming from the mirror foam.
> > Finally, it isn't there anymore, and it seems I avoided prism
scratching.
> > Honestly I can't tell how did I clean it.
> >
> > BTW, anyone has/had a tiny arthropod living and wandering happy inside
the
> > finder assembly?
> > I was told they feed of film. Must be true, since mine starved during a
> long
> > period I wasn't taking pictures. Better than using a piretroid ;-)
> >
> > Regards,
> >
> > Fernando.
> >
> >
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>
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