Re: [Leica] M6 Shutter accuracy?

["Dan Post" <dwpost@email.msn.com>]

Wayne-
Focal plane shutters, like all objects, have a certain inertia, and will
have to accelerate. The actual exposure is determined by the time the film
is exposed- a focal plane shutter is essential a moving gap that travels
from one side of the film to the other. since both will have to accelerate
and brake equally to give an even exposure, photograph an evenly lit
surface, and if you have a desitometer, check the density of both ends of
the 36mm of the negative to see if one of the curtains are hanging.
Dan
- -----Original Message-----
From: Wayne Shumaker <shumaker@ma.ultranet.com>
To: leica-users@mejac.palo-alto.ca.us <leica-users@mejac.palo-alto.ca.us>
Date: Saturday, April 17, 1999 5:50 PM
Subject: [Leica] M6 Shutter accuracy?


>Hi, I'm very new to this group. I hope this is an appropriate question
>for this list? I recently bought a new M6, today acually. I was
>checking the shutter speed at 1/1000 and found starting speed was
>around 1100uSec and the ending speed was around 700uSec. That means
>there is about 2/3's of a stop difference across the film. Is this
>normal or did I get a lemon? I would have thought a new camera would be
>much better than this. (test was done using a laser pointer, photo
>transistor, and scope).
>
>thanks
>Wayne
>