Hi, I'm new to this forum, so sorry if I ask something what has been asked. I searched for similar problem, didn't find it. So I have a Canon RF 200-800 since more than a month, but yesterday I really used it intensively and recognized that there is a major issue, probably with the lens. I have the Canon R5 attached to it. Every picture I take is just so unsharp. I could even say it's unusable. First I tought maybe something with the camera, but no, all my other lenses are sharp as hell. I also tested it with the cheap 500euro 100-400 lens and it was sharper! Even if I zoomed in, it was a lot sharper than the 200-800. I have seen a lot about the heat stuff, but I have made over 2000 pictures in multiple occasions. Not one picture I can say, I'm pretty happy about. Zoomed in at 100%, all images are soft and blurry. I wouldn't know how to discribe it differently. Friend put it on the RP, it's the same problem, so it's for sure lens related. There is nothing on google that I found what other people may have experienced.
Well you have a shutter speed above 1/1000 so I can rule out hand shake being an issue. Looks like you may have got a faulty copy, that happens once in a while. I would return if they still allow at the shop. Otherwise its less than a year old and canon should fix for free.
as a rule i test every new to me lens i get, be it second hand or unused for critical sharpness at home under test conditions target is usually a cereal box or bank note on a tripod with 2 sec timer, 100 iso etc if it fails there then its going back this rules out in the feild errors and inconsistent settings due to changing light etc
