Strange image shake on R7

Circa1200AD wrote:

Circa1200AD wrote:

I did some extensive testing today and all the results point to a case of shutter shock.

The variables I looked at were changing the shutter style (mechanical, EFCS, electronic), burst mode (ContH+, ContH, Cont), shutter speed (~1/125th and 1/1000th), lens (EF-S 15-85mm f3.5-5.6 IS @28mm, EF 28mm f1.8, RF 100-500mm f4.5-7.1 IS @100mm), and lens IS (on/off).

When the shutter speed was high (~1/1000) there was minimal blurring, even in ContH+ with the mechanical shutter. Once the shutter speed was lower, however, there were noticeable differences between the shutter styles. The electronic shutter showed no blurring in virtually all the scenarios whereas the mechanical shutter showed some blurring in virtually every scenario.

The EFCS mode had mixed results. In ContH+, the first image was sharp while the remaining images in the burst suffered some shake. In ContH, the first image in the burst was sharp while the remaining images were not as blurry as in ContH+ but not as sharp as the first. In Cont mode, all the images appeared sharp.

If you are interested, I can post 100% crops of representative samples of the pictures in different conditions.

Thanks!

Here's the comparison. Left image is the first in a burst, right image is a representative image from later in the burst. All were handheld.

Thanks for sharing. This is why I am defaulted to EFCS. What I did notice, additionally, is when panning - the R7 on mechanical shutter is more prone to shake, even when I am using a shutter speed 2-2.5x higher than the focal length at which I am shooting (1/300 - 1/500 at 150mm, for instance). And it's not always - which makes the problem quite "random."