Sony ILME-FX3 Help Manual page 237

Setting values Pixel number (horizontal×vertical)
L: 8.0M 2832×2832 pixels
M: 3.4M 1840×1840 pixels
S: 2.0M 1408×1408 pixels
Hint
When recording in the M or S size, the pixel number will not change even if you switch the angle of view between the full-frame
size and APS-C size.
Note
The L size cannot be selected when shooting in the APS-C size. If you shoot in the APS-C size while the L size is selected, the
image size will switch to the M size temporarily.
Related Topic
Image Quality Settings: File Format (still image)
Aspect Ratio
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