The radius of the diffraction-limited flat field is about 0.5° (or
3.9 mm) at 550 nm (= twice the apparent radius of the Moon,
smaller than the size of the IMX533).
TS Photoline 96 mm f/6 triplet APO
OSLO model by Vlademir Sacek
https://www.telescope-optics.net/commercial_telescopes.htm#even
The radius of the diffraction limited flat-field is about 0.4° (= 4 mm)