02-20-2017, 06:59 AM
looking at Photozone is sometimes looking in a museum 
The test is 6 years old and when was the last first time PZ tested anything when it just came out?
I admire your search skills and doubt my math skills. I thought more or less to rely on the Focal length ÷ aperture number = front lens ø ? Must be totally wrong: The Sigma 50/1.4 Art has ø 60.5 mm. After my equation it then should be f/0.82 So forget this stupidly simplified math.
The test is 6 years old and when was the last first time PZ tested anything when it just came out?I admire your search skills and doubt my math skills. I thought more or less to rely on the Focal length ÷ aperture number = front lens ø ? Must be totally wrong: The Sigma 50/1.4 Art has ø 60.5 mm. After my equation it then should be f/0.82 So forget this stupidly simplified math.