Making image captures look sharp..
Newest blog posts
Understanding resolution and contrast graphs..
- MTF Introduction
- Fantasy Land MTF
- Reading MTF Charts
- MTF Measurement vs Field Curvature
- MTF and Sensor Size
- Lateral Chromatic Aberration and Astigmatism
- Zeiss MTF Examples
- Leica MTF Examples
- Leica MTF Analysis / Summilux, Elmarit, Elmar 24mm
- Leica MTF For Leica 35/1.4 Summilux-M ASPH
- Canon MTF Examples
- Nikon MTF Examples
The fastest extreme wide angle yet..
Sigma’s fast high performance wide angle..
Sigma’s fast high performance normal lens..
Fastest 135mm lens yet, with ultra high performance..
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 wide range zoom with vibration reduction and fixed f/4 aperture..
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..
A superlative multi-spectral lens with perfect color correction..
Canon’s compact image stabilized wide angle zoom..
Relatively inexpensive alternative to the pro 35/1.4G..
State of the art design in a fast 85mm lens..
Compact and lightweight travel-friendly telephoto..
All-arounder compact lens with macro capability..
High speed normal lens optimized for Canon mirrorless..
Bread and butter all-around zoom..
Moderate wide angle expressly designed for Nikon Z cameras..
Normal lens expressly designed for Nikon Z cameras..
Mid-range zoom expressly designed for Nikon Z cameras..
Full frame compact mirrorless with interchangeable lenses..
Fast high performance normal lens of Zeiss design..
Compact moderate wide angle for Sony mirrorless..
Compact normal lens for full-frame Sony mirrorless..
Wide angle to telephoto zoom with optical stabilization..
Razor sharp 28mm lens on APS-C sensor and outstanding usability and features..
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!.
Ultra wide angle equivalent to 19mm f/3.3. .
Medium format telephoto lens, 74mm equivalent..
Telephoto macro lens, 99mm equivalent..
High end image quality, but what about lenses?.
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..
Outstanding build and optical quality in a normal lens..
Outstanding build and optical quality in a medium tele..
On 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..
Brilliant imaging, even wide open, but with a few quirks. (Review in progress) .
Versatility in a “normal” lens and macro too!.
Ultra high performance apochromatic normal lens, first in the Otus line..
Ultra high performance apochromatic medium telephoto, overview and technical..
Beautiful bokeh, razor sharp, superb color correction..
Articles written for Lenspire.ZEISS.com..
Understanding lens performance..
Leica’s ultra wide angle zoom lens..
Leica’s best-performing 21mm..
Leica’s best-performing 24mm, and with a flat field..
Leica’s widest lens utilizing built-in frame lines..
Leica’s smallest and lightest M lens with superlative performance..
Leica’s superlative and most natural lens for the M..
World’s fastest 50mm full-frame lens..
The world’s best 50mm lens is outstanding, but with some limits..
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..
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..
Compact wide angle with brilliant contrast..
Fast and ultra high performance moderate wide angle rangefinder lens..
Ultra compact high performance moderate wide angle rangefinder lens..
Blog posts, reverse chronological
2017-02-25 MTF for Fujifilm GFX GF Lenses
2016-11-07 MTF for the Sigma 85mm f/1.4 DG HSM Art
2016-02-04 Sony Diffraction-Free Computed Fantasy MTF
2015-10-14 Zeiss Otus 28mm f/1.4 APO-Distagon MTF
2015-09-11 Understanding the new Zeiss Milvus Lineup
2015-03-27 Sigma 24mm f/1.4 DG HSM Art, MTF
2014-09-03 Zeiss Loxia MTF Discussion
2013-07-18 Ricoh GR: Lens Quality and MTF
2010-02-12 MTF comments updated for Zeiss ZF / Zeiss ZE
2009-04-08 Zeiss’ Dr. Nasse on MTF, part II
2008-01-21 Zeiss white paper on MTF