Archived posting to the Leica Users Group, 1998/07/08
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Francesco: This means that your shutter is probably off on some of the speeds. It can also mean that the aperature is off, but this is less likely. Is it maybe time for a CLA? Regards, Robert At 03:45 PM 7/8/98 -0700, you wrote: >I recently ran an informal test on some film I was trying for the first time >(Sensia II). I rated the film at different aperture/shutter combos, always >at the same exposure. For example, if the exposure from my incident >meter was 1/250 @ f/8, I would also try 1/500 @ f/5.6, 1/1000 @ f/4, >and 1/125 @ f/11. This was on my M6, by the way. > >I found that as the apertures got smaller (towards f/16), the slides were >slightly darker, and as the aperture enlarged the slides were slightly >lighter. I have noticed this before, but didn't think much of it since the >decrease or increase of light is only 1/4-1/3 stop per f-stop. >Shouldn't a slide exposed at 1/250 @ f/8 look EXACTLY like a slide >exposed at 1/60 @ f/16 or 1/1000 @ f/4 ?? I thought the only thing >that would change would be motion-freezing ability (the shutter speed) >and DOF (the aperture). Does this signify a probem with my M6, or is >this a phenomenon well-known by everyone but me? > >Francesco > > > > > >