Luminous Landscape Forum

Equipment & Techniques => Cameras, Lenses and Shooting gear => Topic started by: Kirk Gittings on April 27, 2007, 11:22:11 pm

Title: Aperture and Distortion
Post by: Kirk Gittings on April 27, 2007, 11:22:11 pm

How does aperture size effect barrel distortion and chromatic aberration? Why?

Title: Aperture and Distortion
Post by: pfigen on April 28, 2007, 01:31:33 am

I'm pretty sure that aperture does not affect distortion, but it does affect vignetting, resolution, diffraction, and on some lenses, the degree of color fringing or c.a. Probably need an optical engineer to tell you why.

Title: Aperture and Distortion
Post by: jjlphoto on May 01, 2007, 03:25:04 pm

If the lens has internal floating elements, then focus effects the degree of linear distrotion, IE, the lens focuses at infinity has some barreling, and focused up close would have more barreling.