I'm not an expert in photoshop, but I noticed the active area of the stamp tool is much smaller than the circle.
I'm not sure what I have changed (possibly by mistake) and do not see any options to reset to the default brush.
Graphic Design Stack Exchange is a question and answer site for Graphic Design professionals, students, and enthusiasts. It only takes a minute to sign up.
Sign up to join this communityI'm not an expert in photoshop, but I noticed the active area of the stamp tool is much smaller than the circle.
I'm not sure what I have changed (possibly by mistake) and do not see any options to reset to the default brush.
It's linked to Brush Hardness.
Key command Mac - Cmd ⌘ Shift ⇧ [ or ]
Windows presumably Ctrl ⌃ instead
Examples
[I can't get a screenshot including the brush itself - it's the size of the first sample image]
Hardness 100
Hardness 0
The image, btw, was from the Photography SE, so already in the SE domain - a problem someone had with colour aberration.
I don't normally publish photos with that much distortion going on ;-)