Re: Official: Sony A7 and A7R Fullframe Mirrorless
miklar wrote:
A7R shutter slap does cause visible blurring due to camera shake.
This is alleviated when the shutter setting is above 1/150.
The test was done with a Nikon 70-200mm 2.8 GII, plus a 2 times Teleconverter, TC20EII. The adapter used is a Novoflex NEX/NIK. This combination was mounted using Markins’ ballhead on a Gtizo GT3541LS, without weights. Floor vibration are almost non-existent.
The good news; the above lens and teleconverter combination is notorious for vignetting when used with a Nikon D3x, however, with the A7R there is virtually no (or very little) vignetting.
You can view the files at http://www.pbase.com/mikeklar/image/153633039
These files are 100% crops.
The distance of the subject from the camera was slightly over 11 meters.
All attempts to capture images between 1 to 2 kilometers away had to be terminated as there was a great deal of atmospheric disturbance.
Cheers
I am not sure if it will fit your Novoflex NEX/NIK adapter, but the Novoflex rotating collar ASTAT-NEX may help balance the whole rig and lessen any vibration that you may be incurring:
Mounting a lens as heavy and long as your 70-200mm GII plus 2X Extender onto the Novoflex adapter and then to the A7r puts a lot of stress on the set-up and acts as a cantilever. Using the Novoflex rotating collar, providing it fits will probably improve your results. You can also try to place a Bean Bag on top of the camera and lens assembly to try to lessen vibration.
By the way, which Markins Ball Head were you using?
Rich
Dec 03, 2013 at 06:43 PM
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