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See also: quality control
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Sony FE 35mm f/1.4 Distagon ZA

Fast and gorgeous moderate wide angle Zeiss design..

Sony Planar T* FE 50mm f/1.4 ZA

Fast high performance normal lens of Zeiss design..

Sigma 14-24mm f/2.8 DG DN Art

Native-mount ultra wide angle high performance zoom for mirrorless..

Sigma 45mm f/2.8 DG DN Contemporary

Compact native-mount normal lens..

Voigtlander FE 21mm f/1.4 Aspherical

Fast high performance manual focus wide angle..

Sony FE 12-24mm f/4 G

Extreme wide angle zoom..

Sony FE 16-35mm f/2.8 GM

Pro-grade f/2.8 wide angle zoom..

Zeiss Loxia 21mm f/2.8 Distagon

Outstanding ultra wide angle performer..

Leica 50mm f/2 APO-Summicron-M ASPH

The world’s best 50mm lens is outstanding, but with some limits..


Blog posts, reverse chronological

2019

2019-12-01 Phase One IQ4 + Schneider Kreuznach LS 40-80mm f/4-5.6 Aperture Series @ 80mm: Mosaic

2019-12-01 Phase One IQ4 + Schneider Kreuznach LS 40-80mm f/4-5.6 Aperture Series @ 55mm: Mosaic

2019-12-01 Phase One IQ4 + Schneider Kreuznach LS 40-80mm f/4-5.6 Aperture Series @ 40mm: Mosaic

2019-11-30 Phase One IQ4 + Schneider Kreuznach LS 240mm f/4.5 IF Aperture Series: Mosaic

2019-09-05 Fujifilm GF Lens Quality Control = Unacceptable

2017

2017-08-19 Sony 12-24mm f/4 G @ 12mm: Single Frame Performance at f/11 vs Focus Stacking at f/11 (Pine at Morgan Lake)

2017-07-23 Sony 12-24mm f/4G Distortion: Uncorrected vs Corrected

2017-07-23 Reader Comment: Sony FE 12-24mm f/4 G Right Side Blur

2015

2015-07-20 Sigma 24mm f/1.4 DG HSM Art Aperture Series: Bristlecone on Bare Hill, Checking for Lens Symmetry (Canon 5DS R)

2015-04-04 Tamron SP 15-30mm f/2.8 Di VC USD: Focusing Problems and Lens Skew

2013

2013-09-06 Samyang 14mm f/2.8: Lens Skew Asymmetry

2013-08-12 Lens Skew with the Leica 50mm f/2 APO ASPH?

2013-02-22 Lens Skew Study added to MSI

2013-02-20 Sigma 35mm f/1.4 DG HSM: Lens Skew Confirmation (Alternate Scene)

2013-02-20 Sigma 35mm f/1.4 DG HSM: Lens Skew

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