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Examples—20/3.5 Color Skopar aberrations

This page shows some of the performance weaknesses of the Voigtlander Color-Skopar 20mm f/3.5 SL ASPH.

The moderate price, small size, and relatively simple optical construction of the 9-element 20/3.5 Color Skopar can’t hope to compete with a highly corrected and much larger lens like the Zeiss ZF 21/2.8 Distagon, with its sixteen (16!) elements. We can expect to see some performance shortcomings with the Color Skopar away from the center of the frame, and it would be unrealistic to expect it to perform as well as more advanced and much larger optical designs.

The solution (as usual) to overcoming optical shortcomings is to stop down, and for the Voigtlander 20/3.5 Color Skopar, f/8 is your optimal choice.

Point spread function

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Since 2006, Diglloyd Advanced Photography is the authoritative review and reference for DSLRs and their lenses: Canon and Nikon primarily, but also Pentax and some medium format. Reviews of key DSLRs are included, but the primary focus is on lens performance. Also included is a wealth of technique and workflow approaches.

DAP includes thousands of pages of exclusive coverage and high resolution Retina-grade examples detailing Canon and Nikon DSLR bodies and their lenses, with in-depth analysis of sharpness and contrast, color, bokeh, vignetting, distortion, MTF, and flare, behavioral and practical usage.

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Nikon D3x + Voigtlander Color Skopar 20/3.5 @ f/4

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