From the Nikon website for the D5300:
JPEG: JPEG-Baseline compliant with fine (approx. 1:4), normal (approx. 1:8), or basic (approx. 1:16) compression
Is the reduction in file size due to binning, or something else?
Is it possible to bin the D5300 to increase the 3.92 μm pixel size for better well depth?