Description : Photographers: Can you tell me what difference between a 50mm 1.8 and 50mm 2.5 lens for Canon?
Last Answer : answer:The f1.8 lens (assuming this is a fixed aperture, and not adjustable to different f-stops) will be suitable for work in low-light conditions, since its opening to permit light is larger than an f-2 ... like to do, the higher f-stop lens will give you a deeper depth of field, if only slightly.