Quote Originally Posted by DJ 86 View Post
i have a small doubt. Why do everyone prefer big aperture in wide angle lens? i know, that big apertures give more light. but then in that case, we mostly click the landscapes at 8 or higher value aperture for more span in focus.
if we use bigger aperture in wide lens, we have very less span in focus. so how does a big aperture in wide lens help?
A wide aperture helps mainly for handholding in dim light. Especially with the short focal length, DoF can be pretty deep even with a wide aperture. Here's an example of a handheld shot at f/2.8 where I was already at ISO 3200 (which is as high as I like to go):


EOS 5D Mark II, EF 16-35mm f/2.8L II USM @ 27mm, 1/25 s, f/2.8, ISO 3200