Nikon APS-C digital SLR camera uses a 35mm fixed-focus lens without anti-shake function. What is the safe shutter speed when shooting still life with a hand-held camera?

The theoretical safe shutter speed is 1/(35× 1.5), which is about 1/50s.

But in practice, this value is related to many things, including shooting posture (standing, sitting, lying down, bending over, etc. ), focusing distance (the closer the shooting distance, the faster the shutter is required), camera pixels (the higher the pixel, the faster the shutter is required), etc. So you can't and don't have to force yourself like this.

Usually1125s is taken as the dividing line, and this shutter number is very safe when shooting at a focal length below 135mm.