Hello dear people,
I'm currently doing a long postponed job, namely exchanging focusing
screens between two MX-es. Reasons for postponing are of course the
trickiness of the procedure. I know of some of the dangers of touching
the screens and such. With pentaprisms I have none experience
whatsoever. I'm searching for people who have experience with this
dirty job because I'm afraid I screwed things up.
What I did is this:
Removed screen, parked it in the holder of the plastic screen box. Next
I looked through the viewfinder to notice some dusty particles. I
thought it to be a good idea to remove these too. So I gently moved a
special micro-fibre lens cleaning cloth over the pentaprism. Looking
through the viewfinder didn't make me happier, to say the least. I
don't know how to describe what I saw; it resembled most a trail of
very tiny oily drops. I wonder where these drops come from: the cloth
or is was it already on pentaprism? Anyway, not being able to remove
the phenomenon I proceeded to place the focusing screen from my other
MX in this camera. Looking through the viewfinder made me sigh a little
(of relief, that is) because there was no visible trace of the oily
substance to be found back on the image in the viewfinder. But still,
there were the dust particles. These are annoying and now I localized
them to be on the focusing screen and not on the pentaprism. Rubbing
with a lens brush did not help; it merely moved the dust from one place
to the other.
This longwinding story comes to an end now, because I'm nearing my
current state of misery; I finally tried to get rid of the dust by
using the lens cloth. I gently moved up and down ONCE. And now I can
see something that is best described as a trace of liquid. It's not
dark but transparant.
My question: is there anybody who has done this job before who can
provide for some suggestions regarding the whole procedure? Think it
would be of help for anyone facing the same situation. One of my
questions is for example: what the hell is going on with this special
lens cloths? There was no mention of it containing any sort of stuff
and I NEVER experienced someting like this (I use the cloth for a
considerable time to clean my lenses (front and back).
Anyway, Hope you guys have some ideas.
BTW: the focusing screen in the above story is a wholly matted one with
an extra fine matted centre circle - so no attached focusing aids on
the screen..
Yours,
Hugo
=====
Don't it always seem to go that you don't know what you've got till it's gone -
Joni Mitchell.
__________________________________
Do you Yahoo!?
The all-new My Yahoo! - Get yours free!
http://my.yahoo.com
