Reviews and Problems with Voigtlaender 20 mm / F3,5 Color Skopar SL II
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Voigtlander Color Skopar ASPH 20mm f/3.5 SLII Lens Review
SLR Lens and Camera Reviews
10 February 2010
Excerpt: Voigtlander, a brand name owned by Cosina of Japan, is fairly well known among rangefinder aficionados. The company is one of the only three that currently still manufactures Leica M39 compatible lenses. Cosina made a splash in late 90s when it released a limited set of SL lenses for Nikon, Pentax and Olympus lenses. There was even one lens model manufactured for the Canon EF mount - the now famous Voigtlander APO Lanthar 125mm f/2.5 SL.
Excerpt: Originally posted 2010-10-25 on Optyczne.pl “Pancake” type lenses enjoy widespread popularity among photographers. It is not always a rational feeling - such devices feature average fastness and the offered image quality on the edge of the frame is not of the highest calibre. Despite that fact perhaps everyone is tempted by their small dimensions, which, combined with a slight reflex camera, can make a discreet journalistic photography possible.
Cons: very weak, momentarily simply dismal image quality on the edge of the frame,, very high astigmatism,, huge coma,, significant vignetting on full frame.
Voigtlander Color Skopar 20mm f/3.5 SL II Aspherical (Canon EOS) - Lab Test / Review
9 August 2010
Conclusion: The Voigtlander Color Skopar 20mm f/3.5 SL II Aspherical is a unique lens: it's the smallest ultra-wide angle lens available for full format DSLRs. Pancake lenses tend to have incorporated some compromises - usually they are comparatively slow and they never reach the performance levels of their bigger counterparts which can simply take advantage of more and bigger lens elements. The weaknesses of the Skopar are most noticeable at max. aperture.