How a lens blurs when out of focus is a Big Deal..
Newest blog posts
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)..
Very compact ultra wide angle..
[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’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..
Sigma’s fast and affordable moderate excellent wide angle..
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..
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..
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..
Articles written for MediumFormat.com..
Normal lens equivqlent to 53mm..
Medium format telephoto lens, 74mm equivalent..
Extreme wide angle with ultra high performance..
Moderate wide angle with low distortion..
Milvus garb for the venerable 15/2.8 Distagon, with improved lens coating..
Highest performing 25mm from Zeiss ever..
Classic design in the latest Milvus build..
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..
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..
Ultra high performance in an extreme wild wide angle lens..
A brilliant, but also colorful character..
- 18/3.5 Distagon Main Page
- Vignetting and Color Shading vs Nikon 14-24mm
- Examples (White Mountains, Nikon D800E)
- Close-Range Aperture Series (Tioga Pine)
- Aperture Series: Creek Sedges, Water-Worn Boulders, Green Moss (Sony A7)
- Comparisons Overview
- Compared with Nikon 14-24/2.8G - Mosaic
- Compared with Nikon 14-24/2.8G - Arcades
- Compared with Nikon 14-24/2.8G - Church Interior
- Compared with Canon EF 16-35mm f/2.8L II - Mosaic
- Resolution Chart
Brilliant imaging, even wide open, but with a few quirks. (Review in progress) .
- 21/2.8 Distagon Main Page
- Field Illumination (Vignetting) and Off-Center Color Balance
- Rendering Style at f/2.8, f/4, f/8: Aspen Thicket
- vs Nikon 20mm f/1.8G: Mt Conness Glacier Remnants (Nikon D810)
- vs Nikon 14-24/2.8G, et al
- vs Canon 16-35/2.8L II
- vs Nikon 14-24/2.8G
- vs Nikon 14-24/2.8G and Nikon 16-35/4G VR
- Comparison: 21/2.8 and 25/2.8 Distagon vs Nikon 24/1.4G
Ultra high performance with a fast aperture..
- 25mm f/2 vs 25mm f/2.8 Discussion
- 25/2 Vignetting
- Examples (Yosemite, White Mountains)
- Examples (White Mountains Snowy Day)
- Aperture Series: Backlit Bristlecone (Nikon D800E)
- Aperture Series: Bristlecone Trunks (Nikon D800E)
- Compared: 25/2 vs 25/2.8 (Bristlecone View of White Mountain Peak, Nikon D800E)
- Aperture Series: Silver Canyon Cottonwood
- Comparison: 25/2 Distagon vs Canon 24mm ƒ/1.4L II (Woods)
A gem with unusual close-focus..
An artist’s drawing tool..
Strokes of a master..
Balance and poise..
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..
King of bokeh! Corner-to-corner sharpness, world class..
Articles written for Lenspire.ZEISS.com..
Q&A on the 15/2.8 Distagon with Dr. Hubert Nasse.
Bread and butter all-around zoom..
Full frame compact mirrorless with interchangeable lenses..
Compact ultra-wide angle lens..
High performance wide angle..
Top-grade medium telephoto..
Outstanding fast wide angle, DSLR optical design..
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..
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!.
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 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..
Six models to choose from..
World’s fastest 50mm full-frame lens..
Leica’s superlative normal lens..
The world’s best 50mm lens is outstanding, but with some limits..
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..
Leica’s longer tele for Leica M..
Leica’s compact 90mm for the M..
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..
Compact high performance, ultra low distortion..
Moderate speed high contrast ultra-wide..
Compact wide angle with brilliant contrast..
Fast and ultra high performance moderate wide angle rangefinder lens..
Pleasing and relatively inexpensive normal lens.
Blog posts, reverse chronological
2014-04-09 Why Is an f/1.2 Lens so Dark on Digital?
2013-08-12 Leica M Typ 240 Lens Coding Failures
2013-02-23 On the Way: Zeiss 135mm f/2 APO Sonnar
2012-03-16 Reader Comments: Zeiss 15/2.8 Distagon
2011-09-09 Canon 8-15mm f/4L Fisheye
2010-06-03 Depth of field with a fast lens in daylight
2009-02-15 Canon 5D Mark II Live View vignetting
2008-06-14 New article on vignetting
2007-09-17 Zeiss ZF 28mm f/2 Distagon announced