Been talking about aperture with a colleague and really want to check my thoughts are correct.
All things being equal would there be any image quality difference between an F4.0 lens and an identical one, except it has F2.8 max?
I said not, assuming the photo is taken at the same aperture on both.
I have always thought 'fast' lenses such as an F2.8 etc were only really advantageous in low light or other instances where a fast shutter speed was needed?
Is there a significant difference in DOF at 2.8, compared to say 4.0? This was the only other reason I thought they might be used.
If I am wrong please correct me
Andrew
All things being equal would there be any image quality difference between an F4.0 lens and an identical one, except it has F2.8 max?
I said not, assuming the photo is taken at the same aperture on both.
I have always thought 'fast' lenses such as an F2.8 etc were only really advantageous in low light or other instances where a fast shutter speed was needed?
Is there a significant difference in DOF at 2.8, compared to say 4.0? This was the only other reason I thought they might be used.
If I am wrong please correct me
Andrew