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See also: optics
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Nikon AF-S 300mm f/4E PF ED VR

Compact and lightweight travel-friendly telephoto..

Canon EF 100-400mm f/4.5-5.6L IS II

A review of Canon’s new 100-400mm zoom.

Hartblei 40/80/120mm SuperRotators

Medium format Zeiss glass in Hartblei precision tilt/shift lens barrels!.

Milvus 15mm f/2.8

Milvus garb for the venerable 15/2.8 Distagon, with improved lens coating..

Milvus 18mm f/2.8

An outstanding 18mm design..

Introduction

Start here to best utilize this guide..

Optical Performance

Sharpness and rendering..

15mm f/2.8 Distagon

Ultra high performance in an extreme wild wide angle lens..

18mm f/3.5 Distagon

A brilliant, but also colorful character..

ZF.2/ZE 21mm f/2.8 Distagon

Brilliant imaging, even wide open, but with a few quirks. (Review in progress) .

25mm f/2 Distagon

Ultra high performance with a fast aperture..

25mm f/2.8 Distagon

A gem with unusual close-focus..

28mm f/2 Distagon

An artist’s drawing tool..

50mm f/1.4 Planar

Brilliant imaging in a compact package..

Sony Alpha A7R II Kolarivision for Leica M

A7R II modified sensor cover glass for Leica M lens performance..

Sony FE 35mm f/1.4 Distagon ZA

Fast and gorgeous moderate wide angle Zeiss design..

Sony FE 50mm f/1.2 GM

High performance, high speed..

Sigma FE 85mm f/1.4 DG DN Art

Ultra high performance medium telephoto..

Voigtlander FE Super Wide-Heliar 15mm f/4.5 Aspherical III

Ultra wide native mount manual focus lens for Sony mirrorless..

Voigtlander FE Nokton 40mm f/1.2 Aspherical

Fast lens speed for versatile rendering..

Voigtlander FE 65mm f/2 Macro APO-Lanthar Aspherical

Ultra high grade macro all-arounder..

Mitakon Zhongyi Speedmaster 50mm f/0.95

Speed to match the Leica Noctilux..

Sony FE 24-70mm f/2.8 GM

Premiere mid-range zoom for Sony full frame mirrorless.

Sony Cybershot DSC-RX1 / RX1R

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

Zeiss Loxia 25mm f/2.4 Distagon

Outstanding wide angle, superb performer..

Zeiss Batis 18mm f/2.8 Distagon

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



Blog posts, reverse chronological

2021

2021-05-13 Cataracts in Your Eyes? CAUTION on Which Intraocular Replacement Lenses Chosen

2018

2018-11-17 Multifocal or Presbyopia-Correcting Human Eye Lens Implants (IOL)

2016

2016-04-14 Zeiss Batis 18mm f/2.8 Distagon: MTF Can Be Better than the MTF Charts Show

2015

2015-09-03 Kolarivision Sony A7R II with Leica M Lenses: Coming Soon

2015-08-08 Sony A7R II with Leica M Lenses

2015-08-04 Readers Write on the Sony A7R II: is there a quality issue with the EVF?

2015-01-16 Sony A7R: Sensor Glass Thickness, Ray Angle and Image Degradation: Kolarivision Modification

2014

2014-03-18 Astigmatism and Lateral Color: Why Performance is Lens + Sensor (aka why do my expensive lenses suck on mirrorless)

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