photo a has an aperture of 16 and photo b had an aperture of 2.8.
photo a uses a higher shutter speed because everything is in focus and photo b has a lower shutter speed because it's just trying to focus the one main object in the picture.
both photos have a 100-200 ISO.
I like photo b better because of how it's blurry in the background.
Actually, it's the reverse on shutter speed. Photo B has the shallower depth of field, which means the aperture is larger (more light), which means the shutter speed must be faster (less light). Photo A has a larger depth of field, which means a small aperture (less light) and a slower shutter speed (more light). 92.
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