
How a lens blurs when out of focus is a Big Deal..
Controlling the zone of sharp detail..
Evenness of illumination across the frame and related effects..
Secondary Longitudinal Chromatic Aberration (SLOCA)..
How to verify a good sample and assess all aspects of lens performance..

High-resolution L-mount full-frame from Panasonic..
Premium fast normal lens for L-Mount..
Sigma 28mm f/1.4 DG HSM Art.
Fast short wide angle lens for L-Mount cameras..
Fast apochromatic prime/wide lens for L-Mount cameras..
Fast apochromatic prime lens for L-Mount cameras..
Fast short normal lens for L-Mount cameras..
Fast short telephoto lens for L-Mount cameras..
Fast short telephoto lens for L-Mount cameras..

Which speed zoom for the Nikon D800/D800E?.
Nikon’s bread and butter telephoto zoom.
Ultra fast 200mm with gorgeous bokeh and high resolving power..
Canon 5D Mark II impressions.
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..
In-depth review evaluates ergonomics, flare, bokeh, vignetting, focus shift, sharpness. Includes comparisons with Zeiss ZF 35/2 Distagon, Nikon 45mm f/2.8P and NOCT-Nikkor 58/1.2. Reviewed on Nikon, but now available for Canon EOS..
Ultra compact normal lens..
[Older material, but still relevant]. Shift lens performance of Nikon/Canon/Schneider/Olympus on various cameras..
Escape the banale postcard look by shooting landscapes at f/1.4 or f/0.95..
APS-C mid-range zoom equivalent to 30-60mm on full-frame..
Canon’s tiny and lovely pancake lens..
Is Canon’s f/1.2 lens really better than an inexpensive f/1.4 or f/1.8?.
Canon’s best-ever medium telephoto and with image stabilization..
Canon’s ultra-fast medium telephoto compared and in the field.
Canon’s updated fast 35mm prime, evaluated on Canon 5DS R..
High performance mid-range zoom..
A whopping 4/3 stop faster than other lenses in its range..
The fastest extreme wide angle yet..
Sigma’s fast high performance wide angle..
Extraordinary optical efforts for outstanding performance..
Sigma’s fast and affordable moderate excellent wide angle..
Extraordinary optical efforts for outstanding performance..
Sigma’s fast high performance normal lens..
Extraordinary optical efforts for class-leading performance?.
Fastest 135mm lens yet, with ultra high performance..
Tilt/Shift by Schneider for Canon and Nikon and other brands..
The Sigma 50mm f/1.4 is a worthy contender in the crowded 50mm area. See how it performs compared to the Canon EF 50/1.4 and EF 50/1.2L..
Nikon’s latest 50mm lens compared with the Zeiss ZF 50/1.4, Nikon 50/1.4D and Sigma 50/1.4..
Nikon’s High performance normal lens.
State of the art design in a fast ultra wide angle lens..
Nikon’s workhorse 200mm macro lens, and not just sharp at close-ups!.
Nikon’s fast ultra wide angle..
State of the art design in a fast 24mm lens. Includes full-resolution images at f/1.4..
An ultra-fast older design still offers appeal on modern digital..
A superlative multi-spectral lens with perfect color correction..
Canon’s premium mid-range zooms..
A fast moderate wide angle lens with some practical difficulties..
State of the art design in a fast 35mm lens..
State of the art design in a fast 85mm lens..
Nikon’s best-ever f/1.4 lens?.
Strong telephoto lens with special control over spherical aberration..
Coveted super speed telephoto..
A review of Canon’s 200mm f/2L mini super telephoto. Not just for sports, it makes a great landscape lens..
Medium format Zeiss glass in Hartblei precision tilt/shift lens barrels!.
Options for a 24mm lens: Nikon 14-24/2.8G, Nikon 24-70/2.8G, Nikon 24/2 AI-S, Nikon PC-E 24/3.5. Sharpness, distortion, flare, field curvature, shooting impression and ergonomics..
Focus shift assesments of a wide variety of lenses of various brands. Shows a range of apertures for each lens and the mount of focus shift, discusses how to compensate for it..

Medium telephoto 100mm equivalent for Phase One XF system.
Mid-range zoom lens equivalent to 26-53mm f/3.3..
Standard normal lens equivalent to 52mm f/2.3..
Standard normal lens equivalent to 66mm f/1.4..
Telephoto equivalent to 200mm lens. .
Performance both in the field and controlled conditions..
Normal lens equivqlent to 53mm..
Medium format telephoto lens, 74mm equivalent..
High end image quality, but what about lenses?.
Medium telephoto macro lens for Pentax 645 digital and film..
How does Leica’s medium format entry measure up in ergonomics, image quality, etc?.
Examples and comparison from the various lenses.
All-arounder zoom for Leica S.

Highest performing 25mm from Zeiss ever..
Highest performing 35mm from Zeiss ever..
Outstanding build and optical quality in a normal lens..
Outstanding build and optical quality in a medium tele..
The classic 100/2 Makro-Planar improved..
Start here to best utilize this guide..
Sharpness and rendering..
A brilliant, but also colorful character..
Ultra high performance with a fast aperture..
A gem with unusual close-focus..
An artist’s drawing tool..
Brilliant imaging in a compact package..
Versatility in a “normal” lens and macro too!.
Fast high performance APO wide angle..
Rendering style, bokeh and beauty..
Ultra high performance apochromatic medium telephoto, overview and technical..
Rendering style, bokeh and 'transparency' without peer..
Razor sharp with gorgeous bokeh..
King of bokeh! Corner-to-corner sharpness, world class..
Beautiful bokeh, razor sharp, superb color correction..

Articles written for Lenspire.ZEISS.com..
Out of the way places and wonders..
Photography Hints and Tips..
Zeiss ZF.2 and Zeiss ZE Lenses For Canon and Nikon.
Medium format Zeiss glass in Hartblei precision tilt/shift lens barrels!.
Vintage 2006 comparative review of Nikon D200 vs Nikon D2x..

Fast standard zoom lens..
Bread and butter all-around zoom..
All-arounder compact lens with macro capability..
High speed portrait lens optimized for Canon mirrorless..
Fast ultra wide angle for Nikon Z..
Fast wide angle for Nikon Z..
Ultra wide compact zoom for Nikon Z cameras..
Fast mid-range zoom expressly designed for Nikon Z cameras..
Mid-range zoom expressly designed for Nikon Z cameras..
Ultra high speed normal lens, flagship of the line..
Ultra high performance extreme wide angle..
Compact ultra-wide angle lens..
High performance wide angle..
High performance, high speed..
High performance mild wide-angle..
Fast and gorgeous moderate wide angle Zeiss design..
Fast high performance normal lens of Zeiss design..
Compact moderate wide angle for Sony mirrorless..
High performance, high speed..
High performance, high speed..
High performance, high speed..
High performance, high speed..
Compact normal lens for full-frame Sony mirrorless..
Top-grade medium telephoto..
Razor sharp medium telephoto with apodization filter..
Native-mount ultra wide angle high performance zoom for mirrorless..
Native-mount mid-range zoom for mirrorless..
Outstanding wide angle, watch out for lens skew..
Ultra high speed native-mount moderate wide angle..
Fast native-mount moderate wide angle..
Compact native-mount wide angle..
Compact native-mount wide angle..
Compact native-mount normal lens..
Compact native-mount wide angle..
Ultra high performance medium telephoto..
Highly corrected medium telephoto..
Fast high performance manual focus wide angle..
Fast mild wide angle lens..
Fast lens speed with curious rendering..
High-grade manual focus wide-normal lens..
Fast lens speed for versatile rendering..
High-grade manual focus normal lens..
Ultra high grade performer at a modest price..
Ultra fast medium telephoto manual focus lens..
Speed to match the Leica Noctilux-M, based on Mitakon Zonghyi optics..
Fast extreme wide angle zoom..
Pro-grade f/2.8 wide angle zoom..
Comapact ultra-wide zoom for Sony full frame mirrorless..
Premiere mid-range zoom for Sony full frame mirrorless.
Premiere mid-range zoom for Sony full frame mirrorless.
Comapact mid-range zoom for Sony full frame mirrorless.
Hand-holdable super telephoto zoom..
Manual focus apodized lens for ultra smooth focus..
Razor sharp 28mm lens on APS-C sensor and outstanding usability and features..
Diminutive full-frame camera with 35mm f/2 fixed lens..
Full frame camera in an ultra-compact body with or without anti-aliasing filter..
Stunningly high image quality in a 20MP point and wide range zoom..
A high performance mid-range zoom..
Wide angle for Micro Four Thirds or Sony E Mount/NEX..
Fast, bright and highly corrected medium telephoto..
Interchangeable lenses on a 16MP APS-C sensor.
A bright short telephoto lens..
Apodization filter version of the 56/1.2..
Medium-long fast telephoto..
Outstanding ultra wide angle performer..
Outstanding wide angle, superb performer..
Manual focus normal lens for full-frame mirrorless..
Autofocus extreme wide angle for Sony full-frame mirrorless..
All-around slightly wide angle/normal with close focus..
Autofocus portrait lens for Sony full-frame mirrorless..
Ultra wide angle lens for Sony NEX or Fujifilm X..
Normal lens for Sony NEX or Fujifilm X..
75mm f/2.8 equivalent lens on APS-C sensor..

Focal lengths, color, weight and travel considerations. [relevant, but dated/old material].
Leica’s fast wide angle..
Leica’s superlative and most natural lens for the M..
Six models to choose from..
World’s fastest 50mm full-frame lens..
Understanding the Rendering Style of the Noctilux..
High performance but flawed 50mm normal lens..
Leica’s compact low-distortion normal lens..
Leica’s ultra high grade and ultra fast modern short telephoto..
Leica’s medium tele for Leica M..
Leica’s budget 75mm medium telephoto..
Compact lens for portraiture or similar..
Fast and ultra high performance moderate wide angle rangefinder lens..
A star performer sets the standard on the SL..
Compact high performance medium telephoto..
World-class performer for Leica M..
A slightly slower, but smaller and lighter alternative to the Noctilux, at 1/10 the price..
Blog posts, reverse chronological
2023
2023-02-25 Sony FE 50mm f/1.4 GM
2022
2022-09-15 Leica Upgrades Leica 35mm f/1.4 Summilux-M ASPH Physical Design
2022-04-27 Sony FE 24-70mm f/2.8 GM II: Unprecedented Performance in a Mid-Range Zoom?
2022-04-08 Sigma 40mm f/1.4 DG HSM Art: Sharp with Gorgeous bokeh, a Steal for Sony Mirrorless
2021
2021-10-30 Canon RF 35mm f/1.8 Macro STM Aperture Series: Alpine Creek Riparian Canopy (Canon EOS R5)
2021-06-30 Sigma FE 35mm f/1.4 DG DN Art Examples: Backyard and Bokeh
2021-05-10 Sony GM Lenses: World-Class Performance, Why Look Elsewhere?
2021-05-02 Essay and Reader Comments: Sony A1 vs Fujifilm GFX100S: Real Achievable Capture Resolution, Effort Level, Enjoyment (UPDATED, v2)
2021-03-31 Sony FE 40mm f/2.5G Aperture Series: Three Oaks
2021-03-31 Sony FE 40mm f/2.5G Aperture Series: Peach Tree Blossoms
2021-03-16 Sony FE 50mm f/1.2 GM: “pinnacle of the G Master series, with the ultimate in resolution and bokeh”
2020
2020-09-25 In Depth Study: How Shutter Speed and Aperture Mangle Bokeh with Electronic First Curtain Shutter (vs electronic shutter and mechanical shutter)
2020-09-01 Sigma FE 85mm f/1.4 DG DN Art — Reviewing Soon
2020-01-07 Sigma 40mm f/1.4 DG HSM Art is an outstanding lens with beautiful bokeh — $400 off today only
2019
2019-09-02 Sigma 45mm f/2.8 DG DN Contemporary Aperture Series: Orange Flower
2019-02-10 Canon RF 28-70mm f/2L Aperture Series: Bokeh with Out-of-Focus Speculars (Canon EOS R)
2018
2018-10-22 Zeiss Batis 40mm f/4 CF: Bokeh Wide Open at f/2 Shows Nonagonal Shape of Lens Diaphragm
2018-09-30 Sony 85mm f/1.4 GM Aperture Series for Bokeh / Visual Impact: Aspen Trunks at Rock Creek
2018-09-25 Sigma’s Fast New Art Lenses, Plus What Looks to be a 'Killer' 70-200mm f/2.8 Zoom
2018-09-06 LensBaby Sol 45mm f/3.5
2018-08-24 Nikon NIKKOR Z 58mm f/0.95 S Noct
2018-07-13 Three Sigma for Sony 70mm f/2.8 DG Macro Aperture Series: Closed Flower Seedheads, Yellow Flower, Crooked Pine
2018-06-22 Bokeh Shootout: Leica 90mm f/2.2 Thambar-M vs Nikon 105mm f/2 DC: Bird of Paradise
2018-05-25 Sigma 105mm f/1.4 DG HSM Art
2017
2017-09-01 Voigtlander 65mm f/2 Macro APO-Lanthar Bokeh Series: Backlit Trees
2017-05-17 Sony FE 16-35mm f/2.8 GM
2017-02-24 Sigma Announces 24-70mm f/2.8 DG HSM Art for Nikon and Canon DSLRs and Sigma sa
2017-02-24 Sigma Announces 14mm f/1.8 DG HSM Art for Nikon and Canon DSLRs and Sigma sa
2017-02-24 Sigma Announces 135mm f/1.8 DG HSM Art for Nikon and Canon DSLRs and Sigma sa
2017-02-14 Hasselblad XCD 90mm f/3.2: Unusual Bokeh for Out-of-Focus Blurs
2016
2016-09-17 Zeiss Milvus 100mm f/2M: Many Examples + Bokeh Aperture Series
2016-09-08 Zeiss Announces 3 Milvus Lenses for Nikon and Canon DSLRs
2016-07-11 NEW Sony Planar T* FE 50mm f/1.4 ZA for Sony Mirrorless
2015
2015-10-22 The Irrational Aim of f/1.4 Lenses
2015-10-21 Impressions of 4K Television
2015-09-17 King of Bokeh, well-controlled SLOCA?
2015-04-13 Making Sharp Images: Updated Bokeh Examples
2015-04-10 Leica 75mm f/2.4 Summarit-M: Bokeh for Defocused Point Sources
2015-04-09 Leica 75mm f/2.4 Summarit-M: Veiling Flare, and Bokeh
2015-03-23 Compared: Fujifilm XF 56mm f/1.2 APD vs Fujifilm XF 56mm f/1.2 (Mannequin and Glass Bottles)
2015-03-23 Compared: Fujifilm XF 56mm f/1.2 APD vs Fujifilm XF 56mm f/1.2
2015-03-10 Fujifilm XF 56mm f/1.2 APD (Bokeh)
2014
2014-11-28 Sony FE 16-35mm f/4 ZA OSS Vario-Tessar: Bokeh Series, In-Focus and Defocused
2014-11-08 Zeiss Loxia 50/2 Planar Aperture Series: Understory Aspen Bokeh
2014-05-13 My Most Important Publication: Making Sharp Images
2014-04-11 Nikon 50mm f/1.2 AIS Aperture Series, DeChambeau Sidelit Barn
2014-04-10 Sigma 50mm f/1.4 DG HSM 'Art' (for Canon, Nikon, etc)
2014-01-22 Sigma 50mm f/1.4 DG HSM 'Art' (for Canon, Nikon, etc)
2014-01-06 Sigma 50mm f/1.4 DG HSM 'Art' (for Canon, Nikon, etc)
2013
2013-12-07 Sony A7R: Aperture Series Redwood Stump, Cross-Eyed Bokeh
2013-11-14 Nikon 50mm f/1.2 AIS Aperture Series, DeChambeau Ranch House, D800E
2013-11-13 Nikon 50mm f/1.2 AIS Aperture Series, Cottonwood Stump, D800E
2013-10-28 Zeiss 85mm f/1.4 Planar: Bokeh Study (Aspen at Dawn, Nikon D800E)
2013-08-31 Sony RX1R: Rendering Style
2013-07-31 Ricoh GR Bokeh, and Its Unusual Lens
2013-07-19 Fujifilm Fujinon 60mm f/2.4 Macro Aperture Series: Pot on Stove (Fujifilm X-E1)
2013-07-17 Leica 50mm f/2 APO-Summicron-M ASPH: Tuolumne River Aperture Series (Leica M Typ 240)
2013-07-13 Zeiss 135mm f/2 APO-Sonnar: Bristlecone Branches Bokeh (Nikon D800E)
2013-07-04 Leica 50mm f/2 APO-Summicron-M ASPH: Bokeh / Blur
2013-07-01 Ricoh GR Digital: More Examples and Bokeh
2013-05-31 Zeiss Touit 12mm f/2.8 Distagon: Aperture Series Sharpness, Bokeh (Picnic Table, Sony NEX-7)
2013-05-16 Zeiss Touit 32mm f/1.8 Planar: Bokeh (Glassware)
2013-05-11 Zeiss Touit 32mm f/1.8 Planar: Examples
2013-03-20 Just Peachy
2013-02-27 Zeiss 135mm f/2 APO-Sonnar: Out of Focus Specular Bokeh
2013-02-27 Zeiss 135mm f/2 APO-Sonnar: Examples for Bokeh Evaluation
2013-02-10 Reader Comment: Fast Lenses Wide Open
2012
2012-11-02 Canon 24-70mm f/2.8L II: Bokeh at f/2.8 Outdoors (Alpine Creek)
2012-10-30 Canon 24-70mm f/2.8L II: Bokeh and Correcting Color Fringing
2012-09-05 Canon 85mm f/1.2L II As a Landscape Lens, Wide Open or Stopped Down? Five Aperture Series
2012-03-16 Reader Comments: Zeiss 15/2.8 Distagon
2011
2011-05-11 Reader Comments
2011-04-18 Bokeh Examples with Nikon D3x and Zeiss 35mm f/1.4 Distagon
2010
2010-12-13 Zeiss 50mm f/1.4 Planar new examples
2010-09-26 Reviewed! Nikon AF-S Nikkor 85mm f/1.4G
2010-09-18 Carl Zeiss 35mm f/1.4 Distagon bokeh (a few more)
2010-09-17 Carl Zeiss 35mm f/1.4 Distagon bokeh
2010-09-15 Nikon 85mm f/1.4G first impressions
2010-09-01 Zeiss 35mm f/1.4 Distagon for Nikon and Canon
2010-07-24 Aperture shape — is it circular? Does it matter for bokeh?
2010-05-30 The way it blurs (bokeh)
2010-05-11 Nikon 24mm f/1.4G focus shift and color bokeh page
2010-04-12 Carl Zeiss on “Depth of Field and Bokeh”
2009
2009-12-14 Two serious issues in Nikon 70-200/2.8G VR II
2009-05-09 Color bokeh — Canon 85/1.2L II
2007
2007-07-30 Zeiss 100mm f/2 Makro-Planar
2007-07-08 Zeiss 100mm f/2 Makro-Planar — best of the best