I've been using a Leica Monochrom for BW and an A7 as a casual color camera. I've accumulated some good Zeiss C/Y lenses to use on the A7. But now my MM needs to go to NJ for servicing, and I'm considering acquiring an A7r body for BW conversions while the MM is out-of-commission. I figure that if it weren't for the A7r's shutter vibration, 36MP BW-converted A7r files should look just about as good as 18MP MM files without a Bayer array.
I understand that to avoid vibration, A7r folks have been shooting at 1/250 or above, or weighing down the body on a tripod with various heavy objects (did anyone try York barbells?). I've been thinking about longer exposures as a solution, and I wonder about the pattern and duration of vibrations.
I photograph landscapes with fairly long exposures. So I wonder if the shutter shakes as it opens, as it closes, or all-the-time? My thought is that if it vibrates only on opening or closing, then fairly long exposures would be relatively free of vibration effects. But if that's so, how long would exposures need to be? 1/8? 1/2? 2 or 4 seconds? Too long to be practical?
I'd appreciate any info / advice / experience about this,