After using the camera for a while:
oingyboingybob wrote in post #18832607
Inability to focus on certain subjects I guess due to few cross type focus points. As an example take a painting or photo in a frame on a wall.
The EOS R will focus nicely on the vertical edges of the frame but completely fails on the horizontal edges.
True complaint. The camera does not focus on horizontal lines, such as the slats of a Venitian blind. The Canon engineers claim the horizontal scans of the camera are fine enough that the slightest tilt should render lines focusable, but in my tests, it takes turning the camera 45 degrees. Fortunately, it's pretty rare that I ever have to focus on a subject that is nothing but horizontal lines. But this is true.
EDIT: The EOS R also does not focus as well on an amorphous surface as Canon DSLRs.
EVF appears nice but whenever the shutter is half-pressed to focus the image seen in the EVF flashes brightly before settling down - very distracting.
This occurs in Exposure Simulation mode when the exposure as set is more than about 1.5 stops underexposed (the viewfinder is dark). The EVF pops up the gain to focus clearly. When not in Exposure Simulation, the system maintains the EVF brightness continuously at what ought to be a correct exposure (even in a dark setting) so it doesn't need to pop up the gain to focus. Basic problem here is that nothing focuses well in the dark. If the exposure is properly set before focusing, this doesn't happen. If the intention is to have a dark image, it will happen.
The EF-EOS R adapter does not work well with 3rd party lenses at wide apertures - circle type vignetting appears as per the example attached and as I cannot afford the prices demanded for the majority of Canon RF lenses this anomaly is a big problem for me.
This is the Canon peripheral light correction setting that corrects lens vignetting according to the camera's lens data table. It happens with some 3rd party lenses that are not fully compliant with EF protocol. Other users report that their third party lenses work properly after being updated by the manufacturer (or using newer versions). This can be bypassed by going into the menu and turning off the Canon peripheral light correction.
The new multi-function bar is awful as it is very easy to inadvertently touch with your thumb changing whatever settings its set for. I turned mine off.
The multi-function bar comes with a setting that toggles it on and off, but many people (including myself) don't like that function because it takes a second of pressing the bar to make the toggle.
Instead, I have programmed the top panel Lock button to control only the multi-function bar. The Lock button is easy to find even when the camera is at the eye, and it works instantly. I have the multi-function bar set for White Balance.
IQ is not as good as it should be for a camera of this price.
It's cheaper than a 5DIV with the same image quality as an 5DIV