Bokeh and Blur
How a lens blurs when out of focus is a Big Deal..
See also: optics
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2022-01-12 Sony FE 50mm f/1.2 GM Aperture Series: Last Season’s Plant Spikes in Spring Meadow
2021-04-02 Reader Comment: Zeiss Milvus 25mm f/1.4 or 18/2.8 or 21/2.8 for Astrophotography?
2020-09-02 Reader Comment: Voigtlander FE 50mm f/2 APO-Lanthar Aspherical Vignetting and Color Symmetry
2018-09-30 Sony 85mm f/1.4 GM Aperture Series for Bokeh / Visual Impact: Aspen Trunks at Rock Creek
2018-07-06 Reader Question on Vignetting for Zeiss Loxia 50mm f/2 Planar
2017-10-18 Zeiss Milvus 25mm f/1.4: MTF, Distortion, Vignetting
2017-05-14 Photoshop ACR Behavior: Uses Wrong Lens Profile
2016-04-14 REVIEWED in Depth: the NEW Zeiss Batis 18mm f/2.8 Distagon
How a lens blurs when out of focus is a Big Deal..
Evenness of illumination, color shading, digital sensor effects, ray angle..
Focusing is more complicated than it first appears..
Controlling the zone of sharp detail..
Understanding the various optical aberrations and behaviors..
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..
Unique challenges of digital infrared..
47 megapixel with Multi-Shot Hi-Res mode..
Fast short wide angle lens for L-Mount cameras..
Fast apochromatic prime/wide lens for L-Mount cameras..
Canon 5D Mark II impressions.
Nikon vs Canon: Noise and Sharpness.
Very compact ultra wide angle..
Normal lens..
Ultra wide angle tilt shift with tremendous versatility.
[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 normal lens equivalent to 53mm 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 100mm f/2.8L Macro IS .
Canon’s updated fast 35mm prime, evaluated on Canon 5DS R..
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..
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 Moderately-Priced 50mm..
State of the art design in a fast ultra wide angle lens..
Nikon’s fast ultra wide angle..
Versatile autofocus 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..
Comparing the new Nikon 60mm to its predecessors, and the Coastal Optics 60/4 APO..
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?.
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..
Comparing the Canon 17-40mm f/4L and 16-35mm f/2.L II..
Ultra wide angle lens for Canon and Nikon..
Articles written for MediumFormat.com..
Adapting lenses delivers degraded results in most cases..
25mm equivalent..
Normal lens equivqlent to 53mm..
Normal lens equivqlent to 32mm..
37mm equivalent..
Moderate wide angle..
Normal lens equivqlent to 45mm..
Normal lens equivqlent to 53mm..
Moderate telephoto..
Normal lens equivqlent to 45mm..
Medium format telephoto lens, 74mm equivalent..
Telephoto macro lens, 99mm equivalent..
Moderate telephoto..
Extreme wide angle with ultra high performance..
Moderate wide angle with low distortion..
The fastest S lens..
Milvus garb for the venerable 15/2.8 Distagon, with improved lens coating..
An outstanding 18mm design..
The classic 21/2.8 Distagon improved..
Highest performing 25mm from Zeiss ever..
Highest performing 35mm from Zeiss ever..
Classic design in the latest Milvus build..
Outstanding build and optical quality in a normal lens..
The classic 50/2 Makro-Planar improved..
Outstanding build and optical quality in a medium tele..
The classic 100/2 Makro-Planar improved..
An Otus, in effect. Milvus garb for the 135/2 APO, with improved lens coatings on one element. See the ZF.2/ZE 135/2 review pages..
Start here to best utilize this guide..
Ultra high performance in an extreme wild wide angle lens..
A brilliant, but also colorful character..
Brilliant imaging, even wide open, but with a few quirks. (Review in progress) .
Ultra high performance with a fast aperture..
A gem with unusual close-focus..
An artist’s drawing tool..
Strokes of a master..
Balance and poise..
Brilliant imaging in a compact package..
Versatility in a “normal” lens and macro too!.
Fast high performance APO wide angle..
Ultra high performance apochromatic normal lens, first in the Otus line..
Ultra high performance apochromatic medium telephoto, overview and technical..
Rendering style, bokeh and 'transparency' without peer..
Razor sharp with gorgeous bokeh..
True-to-life imagery..
King of bokeh! Corner-to-corner sharpness, world class..
Beautiful bokeh, razor sharp, superb color correction..
Articles written for Lenspire.ZEISS.com..
Also known as shading..
Q&A on the 15/2.8 Distagon with Dr. Hubert Nasse.
Overview and assessments of Nikon lenses.
Lenses for Leica M cameras, especially the M9.
Bread and butter all-around zoom..
Full frame compact mirrorless with interchangeable lenses..
Compact ultra-wide angle lens..
High performance wide angle..
High performance, high speed..
Top-grade medium telephoto..
Outstanding fast wide angle, DSLR optical design..
Outstanding wide angle, watch out for lens skew..
Compact native-mount wide angle..
Anything wider would be a fisheye..
Fast lens speed with curious rendering..
High-grade manual focus normal lens..
Ultra high grade performer at a modest price..
Fast extreme wide angle zoom..
Extreme wide angle zoom..
Comapact ultra-wide zoom for Sony full frame mirrorless..
Extreme wide angle with 'zero distortion'..
Full frame camera in an ultra-compact body with or without anti-aliasing filter..
A high performance mid-range zoom..
Super telephoto with superb bokeh and color correction..
24 or 16 megapixels in a compact body with APS-C sensor..
Use DSLR lenses at ~native focal length, and gain a stop of speed..
Outstanding ultra wide angle performer..
Outstanding wide angle, superb performer..
Manual focus moderate wide angle for full-frame mirrorless..
Manual focus normal lens for full-frame mirrorless..
Manual focus telephoto lens for full-frame mirrorless..
Autofocus extreme wide angle for Sony full-frame mirrorless..
Autofocus wide angle for Sony full-frame mirrorless..
Autofocus portrait lens for Sony full-frame mirrorless..
Apochromatic pin-sharp medium telephoto for Sony full-frame mirrorless..
Ultra wide angle lens for Sony NEX or Fujifilm X..
Normal lens for Sony NEX or Fujifilm X..
Moderate telephoto macro lens for Sony NEX or Fujifilm X. Useful on full frame too!.
45mm f/2.8 equivalent FOV lens..
Leica M 60 Megapixels..
Leica M 40 Megapixels..
Leica M 40 megapixel monochrome sensor..
Field shooting the Leica MM, and comparisons..
Off-center color casts, off-center sharpness..
Focal lengths, color, weight and travel considerations. [relevant, but dated/old material].
Leica’s ultra wide angle zoom lens..
Leica’s widest prime lens..
Leica’s fastest and widest lens..
Leica’s best-performing 21mm..
Leica’s fast wide angle..
Leica’s best-performing 24mm, and with a flat field..
Leica’s fast 28mm..
Leica’s widest lens utilizing built-in frame lines..
Tweaked 2016 redesign..
Tweaked 2016 redesign of Leica’s petite performer..
Leica’s smallest and lightest M lens with superlative performance..
Leica’s superlative and most natural lens for the M..
High performance moderate wide angle..
Leica’s f/2 35mm for the M..
Leica’s Budget 35mm lens..
Six models to choose from..
World’s fastest 50mm full-frame lens..
Leica’s superlative normal lens..
Modern iteration of a classic design..
High performance but flawed 50mm normal lens..
Leica’s compact low-distortion normal lens..
Leica’s Budget 50mm 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..
Leica’s longer tele for Leica M..
Leica’s retro telephoto..
Leica’s compact 90mm for the M..
Diminutive telephoto and macro lens..
Leica’s longest M lens..
Compact lens for portraiture or similar..
Superb all-around macro and general-purpose lens..
World’s best mid-range telephoto lens..
Compact and ultra high performance long telephoto..
Notes and examples..
Compact high performance, ultra low distortion..
Moderate speed high contrast ultra-wide..
Zero distortion ultra-wide..
Compact wide angle with brilliant contrast..
Compact wide angle..
Fast and ultra high performance moderate wide angle rangefinder lens..
All around razor sharp performer..
Pleasing and relatively inexpensive normal lens.
Ultra high performance (discontinued).
Compact high performance medium telephoto..
2022-01-12 Sony FE 50mm f/1.2 GM Aperture Series: Last Season’s Plant Spikes in Spring Meadow
2021-04-02 Reader Comment: Zeiss Milvus 25mm f/1.4 or 18/2.8 or 21/2.8 for Astrophotography?
2020-09-02 Reader Comment: Voigtlander FE 50mm f/2 APO-Lanthar Aspherical Vignetting and Color Symmetry
2018-09-30 Sony 85mm f/1.4 GM Aperture Series for Bokeh / Visual Impact: Aspen Trunks at Rock Creek
2018-07-06 Reader Question on Vignetting for Zeiss Loxia 50mm f/2 Planar
2017-10-18 Zeiss Milvus 25mm f/1.4: MTF, Distortion, Vignetting
2017-05-14 Photoshop ACR Behavior: Uses Wrong Lens Profile
2016-04-14 REVIEWED in Depth: the NEW Zeiss Batis 18mm f/2.8 Distagon
2015-06-13 Reader Inquiry: Banding, Posterization, Color Shifts (and the right workflow)
2015-05-27 Sony: Which Lens Corrections are Baked Into the Raw ARW File?
2015-05-22 Leica 28mm f/1.4 Summilux-M ASPH Initial Coverage and Comments
2015-03-27 Sigma 24mm f/1.4 DG HSM Art: Vignetting and Distortion
2014-09-08 Image Circle Size for 55/1.4 APO-Distagon and 135mm f/2 APO-Sonnar
2014-08-13 Reader Question: Image Brightness at Full Aperture vs Stopped Down
2014-04-09 Why Is an f/1.2 Lens so Dark on Digital?
2014-04-09 Color Shading (Vignetting by Color) on Digital Sensors
2014-02-23 Ricoh GR: Circular Ring Artifacts (“Ring Shadow Effect”) Followup
2014-02-23 Does the Sony A7R have Circular Ring Artifacts?
2013-12-06 Sony A7R: Shading, Color Shading and Lens Compensation
2013-12-06 Sony A7R: Aperture Series (Grass Bench) and Apparent Bug in Lens Comp
2013-08-12 Leica M Typ 240 Lens Coding Failures
2013-06-03 Zeiss 15mm f/2.8 Distagon vs Nikon 14-24/2.8 Under Difficult Lighting (Flare)
2013-05-18 Zeiss Touit 32mm f/1.8 Planar: MTF and Distortion and Vignetting Charts (for Sony NEX + Fuji X)
2013-05-17 Zeiss Touit 12mm f/2.8 Distagon: MTF and Distortion and Vignetting Charts (for Sony NEX + Fuji X)
2013-02-23 On the Way: Zeiss 135mm f/2 APO Sonnar
2012-09-27 Zeiss 135mm f/2 APO Sonnar for Nikon and Canon — Superlative Performer
2012-09-13 Zeiss 135mm f/2 APO Sonnar MTF from f/2 - f/16
2012-09-07 Zeiss ZF.2 / ZE 135mm f/2 APO Sonnar for Canon or Nikon
2012-03-16 Reader Comments: Zeiss 15/2.8 Distagon
2012-01-23 Sony NEX-7 Color Shading & Vignetting vs Sony 24mm f/1.8 Sonnar
2012-01-23 Color Shading & Vignetting for Leica 28mm f/2.8 Elmarit-M ASPH and 50mm f/0.95 Noctilux-M ASPH
2011-11-11 Adobe ACR Lens Profile for Zeiss 35mm f/1. 4 Distagon?
2011-09-09 Canon 8-15mm f/4L Fisheye
2011-01-14 Zeiss 35mm f/1.4 Distagon MTF, distortion, vignetting
2010-07-24 Aperture shape — is it circular? Does it matter for bokeh?
2010-06-03 Depth of field with a fast lens in daylight
2009-02-15 Canon 5D Mark II Live View vignetting
2008-08-14 Vignetting Control in Nikon Capture NX 2 (24-70)
2008-06-14 New article on vignetting
2007-09-17 Zeiss ZF 28mm f/2 Distagon announced
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