Secondary Color Correction with Leica 90/2 APO, Zeiss ZM 85mm f/4 Tele-Tessar, ZM 85/2 Sonnar: Barn Interior (Leica M240)

2014-03-31 • SEND FEEDBACK |
Related: apochromatic, Leica, Leica 90mm f/2 APO-Summicron-M ASPH, Leica APO-Summicron, Leica APO-Summicron-M, Leica Lenses, Leica M, Leica M lenses, Leica M240, Leica Summicron, Leica Summicron-M, longitudinal chromatic aberration, optics, rangefinder, secondary longitudinal chromatic aberration, Zeiss, Zeiss Lenses, Zeiss Tessar, Zeiss ZM, Zeiss ZM 85mm f/4 Tele-Tessar

In Guide to Leica:

Secondary Color Correction (“Purple Fringing”)

This f/2 - f/16 aperture series includes HD and UltraHD images with an evaluation of the relative performance of these three lenses for secondary color correction, namely the dreaded “purple fringing”:

• Leica 90mm f/2 APO-Summicron ASPH
  
• Zeiss ZM 85mm f/2 Sonnar
• Zeiss ZM 85mm f/2 Tele-Tessar

Includes a discussion of the reasons for the effects.

Leica 90mm f/2 APO-Summicron-R ASPH
Zeiss ZM 85/4 Tele-Tessar
Zeiss ZM 85/2 Sonnar
(not to scale)

This backlit scene is a worst-case scenarior for “purple fringing”.

Barn Interior