S21 Camera app is really buggy at launch and even with running the 2/1/2021 update. The pictures are blurry, there is camera shake even though phone is not moving. The app is very laggy and seems to have memory issues because I find that after using the camera most of my recent apps are closed. Happening on two different S21s. Reported in the Samsung members app as well.
Model: SM-G991U1 (US UNLOCKED, Snapdragon)
" there is camera shake even though phone is in a tripod and not moving"
That is normally an result of having OIS on while on a tripod. If you're shooting video turn off video OIS. I don't know if it's possible to turn off OIS for a photo.
Galaxy S21 Ultra 512g(VZW), Galaxy Book (original, VZW), Tab S4, Galaxy Watch3 (VZW)
I see many people also reporting issues with S21 camera so I am not alone. I could also ask those of you saying you don't have any issues what model/variant/chipset you have because if it's not the US Unlocked model or a different variant, it's running different software.
My photos are consistently blurry no matter what I do ... I cannot take a picture of my kids; even when they try to hold still any movement results in a blurry image.