stefan rohloff - lens test
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Test: 20 mm Lenses
Informations on tests and images of lenses.
Differences in sun stars using various lenses analog & digital.
Cars head lights as direct light source - how the lenses handel it!
How well can the CA of each lens be corrected ? Clear winner: Zeiss Distagon 2.8/21
Zoom lenses also tested for zoom range shorter than 20 mm. Clear winner: Sigma EX 4.5-5.6/12-24
No problem for most lenses if you stop down a bit.
Different coatings - smallest aperture - red ring - Cokin filters.


Test: Fisheye Lenses
Informations on tests and images of lenses.
Differences in sun stars using various lenses analog & digital.
Cars head lights as direct light source - how the lenses handel it! - analog & digital.
No big differences between the 5 tested fisheye lenses.
Only the Olympus Zuiko 3.5/16 has problems with vignetting.