SLR camera above what is the meaning of the various modes, the corresponding scene what is it?
A +: Full Automatic
A: (Aperture) aperture priority shooting still suitable for this file
S: (Shutter) Shutter Priority, suitable for photographing moving objects this file
P: program AE, the user may set other parameters in addition to the aperture and shutter, aperture and shutter then determined by the program
M: manually set all parameters
B: long exposure