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See also: distortion, optics
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How to Test A Lens

How to verify a good sample and assess all aspects of lens performance..

Nikon AF-S 70-200mm f/2.8G ED VR II

Nikon’s bread and butter telephoto zoom.

Canon 85mm f/1.4L IS USM

Canon’s best-ever medium telephoto and with image stabilization..

Sigma 24-35mm f/2 DG HSM Art

Mid-range optimized groundbreaking f/2 zoom..

180mm Lenses for the Nikon D3x

Explores options for 180mm lenses on the Nikon D3x, including the Leica 180/2.8 APO-Elmarit-R in Nikon mount, Nikon 180/2.8 ED, Nikon 70-200/2.8 VR, Nikon 70-300/4.5-5.6 VR, and Tamron 70-200/2.8. Updated: now includes the Voigtlander 180/4 APO!.

Canon 24-70mm f/2.8L II and 24-70mm f/4L IS

Canon’s premium mid-range zooms..

Nikon AF-S 85mm f/1.4G

State of the art design in a fast 85mm lens..

Nikon Ultra Wide Zooms

Comparing Nikon 16-35mm f/4 VR, 17-35mm f/2.8, 14-24mm f/2.8, 18-35mm, 24-70mm f/2.8 along with Nikon 20mm f/3.5, 24mm f/2, 28mm f/2, 35mm f/1.4 AIS, and more..

Otus 85mm f/1.4 APO-Planar

Ultra high performance apochromatic medium telephoto, overview and technical..

Zeiss LensSpire Articles

Articles written for Lenspire.ZEISS.com..

Understanding optics

Understanding lens performance..

Considerations in choosing a lens.

Focal lengths, color, weight and travel considerations. [relevant, but dated/old material].

Leica 16-18-21mm f/4 Tri-Elmar-M ASPH

Leica’s ultra wide angle zoom lens..

Zeiss ZM 85mm f/2 Sonnar

Ultra high performance (discontinued).


Blog posts, reverse chronological

2019

2019-04-06 Zeiss Batis 85mm f/1.8: the Negative Sharpness and Micro Contrast Effects of Correcting nearly 3% Pincushion Distortion

2015

2015-04-29 Zeiss Batis 85mm f/1.8 Sonnar: MTF Series from f/1.8 - f/16 + Distortion

2010

2010-11-13 Nikon 24-120mm f/4G VR comments

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