How To Get Peak Sharpness With Perfect Focus
Focusing is more complicated than it first appears..
Change in focal plane left to right (swing) or top/bottom (tilt), due to system “slop” from manufacturing tolerances, or with tilt-shift lenses or view cameras as a feature.
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2024-05-17 Hasselblad XCD 45mm f/4P: Optically Swung?
2023-12-30 Case Study: Nailing the Ideal Zone of Focus using Focus BKT
2020-10-18 Analyzing Swing and Tilt of Sony A7R IV with Two Samples of Sony FE 12-24mm f/2.8 GM
2020-10-18 Swing and Tilt: Subject Distance vs Lens Focusing Offset
2018-10-09 Nikon Z7: Image Sharpness vs Zone of Focus, Autofocus Error and Mitigation
Focusing is more complicated than it first appears..
Focusing accuracy and errors..
Zone of focus, not plane of focus.
Focus shift with a variety of lenses..
How to verify a good sample and assess all aspects of lens performance..
Sigma 28mm f/1.4 DG HSM Art.
Ultra wide angle premium zoom lens relying on distortion correction..
All-arounder zoom with dubious optical compromises..
Fast short wide angle lens for L-Mount cameras..
Fast short normal lens for L-Mount cameras..
36 megapixels in a compact full-frame DSLR..
Tamron’s ultra wide to medium fast zoom..
Fast constant-aperture ultrawide zoom..
Mid-range optimized groundbreaking f/2 zoom..
The fastest extreme wide angle yet..
Sigma’s fast high performance normal lens..
Extraordinary optical efforts for class-leading performance?.
Nikon’s High performance normal lens.
Versatile image-stabilized mid-range zoom..
State of the art design in a fast 35mm lens..
Relatively inexpensive alternative to the pro 35/1.4G..
State of the art design in a fast 85mm lens..
Nikon’s ultra wide angle zoom and the Nikon 14mm f/2.8, critical focus shift behavior..
Articles written for MediumFormat.com..
Mid range zoom 27-54mm equivalent for Phase One XF system.
Is 100 better than 45/50/60 megapixels?.
Compact wide angle.
Compact wide angle.
Mid-range zoom lens equivalent to 26-53mm f/3.3..
Compact wide angle.
Slightly wide compact normal lens equivalent to 41mm f/2.9..
Standard normal lens equivalent to 52mm f/2.3..
Standard normal lens equivalent to 66mm f/1.4..
Mirrorless large format with leaf shutter lenses, 3rd generation..
18mm equivalent..
Normal lens equivqlent to 45mm..
Outstanding build and optical quality in a medium tele..
Brilliant imaging, even wide open, but with a few quirks. (Review in progress) .
Ultra high performance with a fast aperture..
An artist’s drawing tool..
Strokes of a master..
Ultra high performance apochromatic normal lens, first in the Otus line..
King of bokeh! Corner-to-corner sharpness, world class..
Articles written for Lenspire.ZEISS.com..
Compact ultra-wide zoom..
Fast ultra wide zoom lens..
Fast standard zoom lens..
Setup, IBIS performance, focusing..
Setup, IBIS performance, focusing..
Fast ultra 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..
Moderate wide angle expressly designed for Nikon Z cameras..
Ultra high performance extreme wide angle..
High performance, high speed..
Top-grade medium telephoto..
Super-fast ultra-wide astrophotography lens..
Native-mount ultra wide angle high performance zoom for mirrorless..
Ultra high performance medium telephoto..
High-grade manual focus normal lens..
High-grade manual focus wide-normal lens..
Fast extreme wide angle zoom..
Extreme wide angle zoom..
Wide range zoom aimed at bloggers..
Premiere mid-range zoom for Sony full frame mirrorless.
Wide mid-range zoom targeted at video shooters..
Full frame camera in an ultra-compact body with or without anti-aliasing filter..
Native Micro Four Thirds macro lens..
Superb ergonomic design in a compact camera..
Outstanding ultra wide angle performer..
Outstanding wide angle, superb performer..
Leica’s fastest and widest lens..
Leica’s best-performing 24mm, and with a flat field..
Leica’s widest lens utilizing built-in frame lines..
Six models to choose from..
Fast and ultra high performance moderate wide angle rangefinder lens..
Fast high performance wide angle..
2024-05-17 Hasselblad XCD 45mm f/4P: Optically Swung?
2023-12-30 Case Study: Nailing the Ideal Zone of Focus using Focus BKT
2020-10-18 Analyzing Swing and Tilt of Sony A7R IV with Two Samples of Sony FE 12-24mm f/2.8 GM
2020-10-18 Swing and Tilt: Subject Distance vs Lens Focusing Offset
2018-10-09 Nikon Z7: Image Sharpness vs Zone of Focus, Autofocus Error and Mitigation