Sigma 50mm F1.4 Art Review - VS. Canon 50mm F1.2L

Sigma 50mm F1.4 Art vs Canon 50mm F1.2 vs Sigma 50mm EX vs Canon 50mm F1.8 ... Another thing I have noticed is that although F1.2 is only 1/3 to 1/2 of a stop faster than F1.4, the exposure difference between both lenses is in fact around 3/4 of a stop, t

willchaophotography.com