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See also: distortion, optics
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Panasonic Lumix S 24-105mm f/4 Macro OIS

All-arounder entry-level mid-range zoom for L-Mount..

Panasonic Lumix S PRO 50mm f/1.4

Premium fast normal lens for L-Mount..

Panasonic Lumix S PRO 70-200mm f/4 OIS

Image stabilized classic 70-200mm for L-Mount..

Leica 50mm f/1.4 Summilux-SL ASPH

Fast apochromatic prime lens for L-Mount cameras..

Leica SL Lenses

Leica’s offerings in L-mount..

Leica 16-35mm f/3.5-4.5 Super-Vario-Elmar-SL ASPH

Ultra wide angle premium zoom lens relying on distortion correction..

Leica 24-90mm f/2.8-4 Vario-Elmarit-SL ASPH OIS

All-arounder zoom with dubious optical compromises..

Canon 14mm f/2.8L II

In-depth review of the Canon EF 14mm f/2.8L II including flare, distortion, field curvature, resolution charts, numerous field examples and comparison to the Nikon 14-24mm f/2.8G. The Canon EF 14/2.8L II is a superb lens, but with some peculiarities which may enhance or degrade its appeal for different uses. The review is as much a “user guide” as a review; even if you use this lens it’s well worth your time to read this review..

Sigma 135mm f/1.8 DG HSM Art

Fastest 135mm lens yet, with ultra high performance..

Nikon AF-S Nikkor 58mm f/1.4G

Nikon’s High performance normal lens.

Nikon AF-S 24mm f/1.4G ED

State of the art design in a fast 24mm lens. Includes full-resolution images at f/1.4..

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..

Nikon NIKKOR Z 50mm f/1.8 S

Normal lens expressly designed for Nikon Z cameras..

Nikon NIKKOR Z 14-30mm f/4 S

Ultra wide compact zoom for Nikon Z cameras..

Nikon NIKKOR Z 24-70mm f/2.8 S

Fast mid-range zoom expressly designed for Nikon Z cameras..

Nikon NIKKOR Z 24-70mm f/4 S

Mid-range zoom expressly designed for Nikon Z cameras..

Sony FE 24mm f/1.4 GM

High performance wide angle..

Sony FE 28mm f/2

Fast wide angle..

Sigma 35mm f/1.2 DG DN Art

Ultra high speed native-mount moderate wide angle..

Sony FE 24-105mm f/4 G OSS

Wide angle to telephoto zoom with optical stabilization..

Sony Cybershot DSC-RX1 / RX1R

Full frame camera in an ultra-compact body with or without anti-aliasing filter..

Sony DSC-RX100

Stunningly high image quality in a 20MP point and shoot tiny camera..

Fujifilm X-Pro2

Fujifilm's 24MP APS-C offering..

Zeiss Batis 18mm f/2.8 Distagon

Autofocus extreme wide angle for Sony full-frame mirrorless..

Zeiss Batis 25mm f/2 Distagon

Autofocus wide angle for Sony full-frame mirrorless..

Zeiss Touit 12mm f/2.8 Distagon

Ultra wide angle lens for Sony NEX or Fujifilm X..

Zeiss Touit 32mm f/1.8 Planar

Normal lens for Sony NEX or Fujifilm X..


Blog posts, reverse chronological

2019

2019-09-16 Sigma 35mm f/1.2 DG DN Art Aperture Series: Effects of Distortion Correction

2019-09-01 Reader Question: Considering Focus Breathing Performance for Focus Stacking When Choosing a Lens

2019-06-20 Nikon NIKKOR Z 14-30mm f/4 S Distortion at 14mm, 19.5mm, 30mm

2019-05-12 Sharpness and Micro Contrast Losses from Mandatory Distortion Correction with the Nikon NIKKOR Z 24-70mm f/2.8 S

2019-04-21 Panasonic LUMIX S PRO 50mm f/1.4: How Distortion Correction Affects Sharpness in both Single Shot and Multi Shot High Res Mode

2019-04-20 Leica 16-35mm f/3.5-4.5 Super-Vario-Elmar-SL ASPH: Assessing Distortion at 16mm, 25mm, 28mm, 35mm, plus MTF

2019-04-19 Leica 50mm f/1.4 Summilux-SL ASPH: Sharpness Losses from Distortion Correction

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

2019-04-06 Panasonic LUMIX S 24-105mm f/4 Macro OIS: Evaluating Distortion and the Effects of Distortion Correction

2018

2018-09-27 Zeiss Batis 40mm f/2: Data Sheets Continue to Omit Optical Distortion, Showing Only Corrected Distortion

2018-01-28 Sony A7R III Pixel Shift: How Distortion Correction Affects Micro Contrast and Sharpness with Sony 24-105/4G OSS @ 24mm

2018-01-28 Sony A7R III Pixel Shift: How Distortion Correction Affects Micro Contrast and Sharpness with Sony 24-105/4G OSS @ 105mm

2016

2016-04-14 Zeiss Batis 18mm f/2.8 Distagon: Data Sheet Confusing Because Distortion Graph is Software-Corrected (only)

2013

2013-05-11 Zeiss Touit 32mm f/1.8 Planar: Correcting Distortion in Adobe Camera Raw

2013-05-10 Zeiss Touit 32mm f/1.8 Planar: Distortion Correction in JPEG, vs RAW

2013-05-10 Zeiss Touit 12mm f/2.8 Distagon: Distortion Correction in JPEG, vs RAW

2012

2012-12-15 Sony RX1: Aperture Series, Distortion Correction

2012-09-09 Sony RX100: Adobe Camera RAW 7.2 RC Distortion Correction = FORCED ON

2012-04-25 RAW vs JPEG on the Fuji X-Pro1 from f/1.4 through f/16

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