garyvot
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molson wrote:
Testing out the new (used) R7 and RF 100-400 that I bought for my wife. As usual, whenever new gear arrives, we can be assured of several days of gloomy, rainy weather... but it's also a good opportunity to see how the camera deals with high ISO's.
Somewhat surprisingly, in really poor light, the R7 seems to grab focus noticeably faster than my Nikon Z8. 
Nice. Enjoy the new camera!
You may already be aware of all this, but the R7 can be a little quirky with both autofocus and with image sharpness due to shutter shock.
If you are using servo and eye tracking shooting short high-speed bursts and you find that the focus frame to frame is inconsistent, try dialing back the frame rate. The accumulated wisdom here seems to be that the readout speed of the R7 sensor is not quite fast enough to keep up with AF tracking at the fastest frame rates. Slowing the camera down a bit helps with consistency of focus, apparently.
What I found in my own testing is considerable shutter shock with certain lenses when using EFCS at the highest 'H+' frame rate. The initial frame was always sharp but subsequent frames would blur. Switching to the slower 'H' mode eliminated this problem. If you are shooting with a bigger, heavier lens or at higher shutter speeds, then this could be masked.
I think the R7 is a pretty great camera with a couple of quirks. You can work around them if you know what to expect.
Good luck.
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