Greggf wrote:
jgaster wrote
naturephoto1 wrote
I know that I posted the first image in this pair earlier today. I am still trying to figure out how to limit the vibration of the A7r camera with long lenses in the vicinity of 200mm and longer particularly in the Portrait orientation. As more tests are run, I will try to post some results. But, both of these images were shot with my tripod mounted Leica R 280mm f4 Apo Telyt lens and my A7r. Images shot at ISO 800, I believe f4 for 1/160 second. and processed in LR5.6. The 2nd image is about a 100% crop. Look at the amazing sharpness in some of the lines in some of the thistle flower; this is what I focused on at 14.4X in Live View of the A7r.
Rich Rich
The general rule to avoid camera shake, “vibration,” regardless of equipment, is to have a minimum shutter speed equal, or, 20% longer, than your lens in millimeters. For example, if you are using a 200mm lens, your minimum shutter speed should be somewhere around 1/240. Using that basic rule of photography, I have never had a shutter issue I could trace to any particular camera. That is a good rule to follow. Unfortunately, what Rich is taking about is the inherent shutter vibration of the A7r with longer lenses....and has nothing to do with photography.
Gregg
I know that a lot's been posted about the shutter vibration, but I have yet to experience this phenomenon . Granted, I've only had my A7r for about 5 weeks, but I've been playing with it at various focal lengths, from ultrawide up to 400mm. I've been shooting at a wide variety of shutter speeds, from 1/8 through the gamut and haven't experienced the shutter vibration at the range of focal lengths that's been reported to be problematic. If it matters, I'm using an older Gitzo GT2540 tripod with a Markins M-10 ballhead and RRS lever clamp for support, as well as a non-RRS L bracket. I don't use a cable release (don't have one yet for the Sony), but I make a habit of always using the 2-sec timer when on the tripod, even when shooting my 5D2.