Archived posting to the Leica Users Group, 2000/10/02

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Subject: Re: [Leica] Veiling Flare in an M4-P
From: Walter S Delesandri <walt@jove.acs.unt.edu>
Date: Mon, 2 Oct 2000 10:38:48 -0500 (Central Daylight Time)

No, that's a new one on me.....I've had a camera where the RF had been pulled, 
and the little "shim" left out....and light would leak around the shutter baffle...
but that was the wierdest thing I've seen.....

I'd put a body cap on it, put a scrap of unexposed film in the body cavity, 
and carry it about in the sun...to see if light is getting into the "box"
OTHER than through the lens mount....but I don't see how.....there is some 
light trap material above/around the lens mounting flange, in front/under 
the finder assembly, but that never has seemed a problem.....

Keep us posted, tho....good to hear from you Mark...

WAlt
 

On Mon, 2 Oct 2000 10:03:49 -0500 Mark Rutledge <markrut@ticnet.com> 
wrote:
> Bert,
>     I have had this a few times on my M6 and it confused the hell out of me!
> The first time w/ an old Summitar and then with a 35 Summicron pre-asph.
>      The "fog" extends the whole horizontal length of the frame at the
> bottom and even bleeds into the space between frames. The strange thing was
> it started, like yours, a little way up the frame(don't have the neg in
> front of me to measure) with an almost perfect straight edge.
>     I checked the lens, camera back, camera bottom for light leaks with a
> flashlight and found nothing. The baffling thing was I know there was no
> direct sun on the lens and the Summicron even had a hood when it  occurred.
> I checked the interior of the camera for anything "shiny" that may be
> reflecting light. The only thing I saw that remotely could be causing it was
> when the shutter was open the inside of the back half of the shutter
> gate/path was unfinished metal. I'm not sure all M's are like this, so I
> took a Sharpie and blacked as much as I could. I don't know if this helped
> (haven't seen it again though!) but it was the only explanation I could
> find.
> Walt, you ever seen this?
> 
> Mark Rutledge
> 
> ----- Original Message -----
> From: "Bert Otten" <e.otten@med.rug.nl>
> To: <Leica-Users@mejac.palo-alto.ca.us>
> Sent: Monday, October 02, 2000 5:32 AM
> Subject: [Leica] Veiling Flare in an M4-P
> 
> 
> > Regularly I have a veiling flare in my negatives and slides
> > using the 35/2 Summicron latest non-ASPH and the
> > 21/2.8 Elmarit ASPH.
> > The flare occurs with strong side lights and does not
> > affect a 1.7 mm strip at the lower border of the negative
> > in the camera (which is at the top of the image when seen correctly).
> > The flare is strongest close to this unaffected strip and is visible
> > throughout the rest of the image.
> <snip>
> 
>