thearne3
Mu-43 Top Veteran
Hi,
I just noticed that my E-P1 does not seem to expose properly with MF lenses when the shutter speed is less that 1/15 or so. I noticed this when testing two lenses and it's the same with both.
I set up a tripod and took sequential pictures with each lens. Camera set on aperture priority. Starting at f2.8, I opened the aperture a full stop (2.8, 4, 5.6, etc) with each picture. The starting shutter speed was about 1/13 at ISO 400, then 1/10, then 1/6, etc. I believe the shutter speed should have been cut in half each time, shouldn't it? In any case, the pictures were indeed progressively underexposed.
This does not occur with AF lenses.
Can anyone explain this?
Thanks,
Tom
I just noticed that my E-P1 does not seem to expose properly with MF lenses when the shutter speed is less that 1/15 or so. I noticed this when testing two lenses and it's the same with both.
I set up a tripod and took sequential pictures with each lens. Camera set on aperture priority. Starting at f2.8, I opened the aperture a full stop (2.8, 4, 5.6, etc) with each picture. The starting shutter speed was about 1/13 at ISO 400, then 1/10, then 1/6, etc. I believe the shutter speed should have been cut in half each time, shouldn't it? In any case, the pictures were indeed progressively underexposed.
This does not occur with AF lenses.
Can anyone explain this?
Thanks,
Tom