Sharpness loss by focusing or zone of sharp focus..
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Newest blog posts
2018-08-25 Nikon Z7: Pinpoint AF
Focusing is more complicated than it first appears..
- Focusing Overview
- Autofocus Tips
- Fine Tune Autofocus for Each Lens
- Bracket Your Focus
- Check Your Camera
- Focus Fast Lenses Stopped Down
- Use Focus Assist (Electronic Rangefinder)
- Hedge Your Bet By Stopping Down
- Use Supplementary Light
- Focusing Aids
- Rangefinder Focusing Aids
- Use a Different Focusing Screen
- Use a High Contrast Target
- Check your Diopter Setting
- Check Your Eyes and Your Accuracy
Focusing accuracy and errors..
- Focus Bracketing with a 15mm Lens on Nikon D800E
- Autofocus Error with Nikon 24mm f/1.4G
- Autofocus Consistency With Canon/Nikon 35mm f/1.4
- Contrast Detect Autofocus Error, Nikon D800E
- Focus Bracketing Study (Canon 5D Mark III, 40mm f/2.8 STM)
- Autofocus Error with Leica S2
- Field Confirmation of Autofocus Error with Leica S2
- Rangefinder Focus Error With Leica M9 and Zeiss Lenses
- Rangefinder Focus Error With Brand-new Lens
- Rangefinder Focus Error With Leica M9 + 50/1.4 Summilux
- Focus Bracketing Study (Nikon D800 / Leica 100/2.8 APO)
Using your camera’s mirror lockup, self timer, and Live View features..
Increasing Depth of Field by means other than stopping down..
Best practices for shooting stacking frames..
Zone of focus, not plane of focus.
Elusive sharpness, depending on aperture.
Understanding resolution and contrast graphs..
How to verify a good sample and assess all aspects of lens performance..
Maximizing image quality, dynamic range, minimizing digital noise.
The best becomes better..
Unprecedented support for focus stacking in full-frame DSLR..
Improvements on the workhorse D800E..
36 megapixels in a compact full-frame DSLR..
- Focus Accuracy (Focus Assist with Green Dot)
- Autofocus AF-S Accuracy: Ad-Hoc Field Shooting
- Autofocus AF-S Accuracy: Nikon 85/1.4G, 85/1.8G (Mosaic)
- Autofocus AF-S Accuracy: Nikon 85/1.4G (Trash Can)
- Autofocus AF-S Accuracy and Precision: Lens Align Target
- AF Fine Focus Adjust (Rodin)
- Autofocus AF-S Accuracy: Nikon 70-200mm f/2.8 VR II (Various)
- Autofocus AF-C Accuracy: Nikon 85/1.4G, 85/1.8G (Mosaic)
D800E supplement and comparisons with Nikon D800..
High speed big brick shooter..
18 megapixel big black brick, Canon’s top of the line DSLR..
22 megapixel successor to the popular 5D Mark II..
Nikon’s finest wide angle lens..
Nikon’s finest 70-200 zoom as of 2017..
Nikon’s bread and butter telephoto zoom.
The 24.6 megapixel Sony A900 digital SLR is compared with Canon’ top-of-the-line 21.1MP EOS 1Ds Mark III. A field report including two comparisons with the Canon 1Ds Mark IIII, example images in color and black and white, and the Zeiss ZA 135mm f/1.8 Sonnar. Anti-Shake (SteadyShot) is assessed, as is noise behavior..
Ultra fast 200mm with gorgeous bokeh and high resolving power..
Includes: D3x resolution comparisons (res chart) with Nikon D3, Canon EOS 1Ds Mark III, resolution comparison on outdoor shot with Nikon D3, large examples, large wildlife examples, Nikon 200mm f/2 VR on D3x, long exposure noise ISO series, D3x sensitivity on diffraction, D3x dynamic range at ISO 100 vs ISO 50, D3x vs D3 color and noise..
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..
Very compact ultra wide angle..
Medium telephoto with world-class chromatic correction..
24-megapixel APS-C DSLR with SuperResolution true-color..
23-megapixel APS-C DSLR with an unusual feature set..
APS-C normal lens equivalent to 53mm on full-frame..
Canon’s updated fast 35mm prime, evaluated on Canon 5DS R..
Fast constant-aperture ultrawide zoom..
Mid-range optimized groundbreaking f/2 zoom..
Sigma’s fast and affordable moderate excellent wide angle..
Sigma’s fast high performance normal lens..
Extraordinary optical efforts for class-leading performance?.
Fastest 135mm lens yet, with ultra high performance..
Sigma’s fast telephoto APO macro lenses..
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..
Nikon’s workhorse 200mm macro lens, and not just sharp at close-ups!.
Versatile image-stabilized mid-range zoom..
State of the art design in a fast 24mm lens. Includes full-resolution images at f/1.4..
- Autofocus — Introduction
- Autofocus — Nikon D3s Building Distant
- Autofocus — Nikon D3s Brick Building
- Autofocus — Nikon D3s Golden Gate Bridge
- Autofocus — Nikon D3x Brick Building
- Autofocus — Nikon D3x Golden Gate Bridge
- Autofocus — Nikon D3x Flag
- Autofocus — Mis-focus Examples
- Autofocus Examples
- Autofocus Examples At Night
- Autofocus — Conclusions
An ultra-fast older design still offers appeal on modern digital..
Canon’s compact image stabilized wide angle zoom..
Canon’s premium mid-range zooms..
State of the art design in a fast 35mm lens..
Relatively inexpensive alternative to the pro 35/1.4G..
Relatively compact super-telephoto zoom..
A review of Canon’s new 100-400mm zoom.
Comparing the 16-35mm f/2.8L II to most of Canon’s wide angle prime lenses. Optical performance, ergonomics, focus, build quality..
Adapting lenses delivers degraded results in most cases..
Experience, reader insights, etc..
Image quality assessments..
Ultra wide angle equivalent to 19mm f/3.3. .
Mid-range zoom lens equivalent to 26-53mm f/3.3..
Moderate wide angle equivalent to 37mm f/2.3..
Standard normal lens equivalent to 52mm f/2.3..
Ultra high speed telephoto equivalent to 90mm f/1.6..
High performance macro photography on medium format, equivalent to 99mm f/3.3..
Telephoto equivalent to 200mm lens. .
High performance moderate wide angle.
High performance all-arounder macro lens.
Mirrorless large format with leaf shutter lenses..
A price/performance breakthrough?.
A variety of 645 lens tests on the 645D.
Moderate wide angle lens for Pentax 645..
How does Leica’s medium format entry measure up in ergonomics, image quality, etc?.
Examples and comparison from the various lenses.
Moderate wide angle with low distortion..
Visible spectrum, cameras, color space, infrared vs. color & examples..
All about shooting in infrared..
Unique challenges of digital infrared..
Highest performing 25mm from Zeiss ever..
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..
Brilliant imaging, even wide open, but with a few quirks. (Review in progress) .
Strokes of a master..
Comparing the two 50mm options near and far, more comparisons coming..
Fast high performance APO wide angle..
Ultra high performance apochromatic normal lens, first in the Otus line..
Rendering style, bokeh and beauty..
Ultra high performance apochromatic medium telephoto, overview and technical..
Rendering style, bokeh and 'transparency' without peer..
King of bokeh! Corner-to-corner sharpness, world class..
Articles written for Lenspire.ZEISS.com..
- Focusing Zeiss DSLR Lenses For Peak Performance, PART ONE: The Challenges
- Focusing Zeiss DSLR Lenses For Peak Performance PART TWO: Tips and Best Practices for Sharply Focused Images
- Depth of Field Challenges: Bypass the Limits with Focus Stacking, Near or Far, Macro or Landscape
- Getting Started with Focus Stacking
- Macro and Close-up Shooting, Especially Outdoors
- Zoom Lens or Prime? 15/18/21mm Lenses
- Zoom Lens or Prime? 50mm and 55mm
- Zoom Lens or Prime? 135mm
- Zeiss Milvus 50mm f/1.4 and 85mm f/1.4 Anchor a Gorgeous New Lens Line
- Zeiss Fills Out the Milvus DSLR Lens Lineup with the 21/2.8, 35/2, 50/2M, 100/2M
- Zeiss Otus 28mm f/1.4 APO-Distagon: the Reference Standard With a Gentle Grace
- Astrophotography Tips, Especially with Zeiss Otus 28mm f/1.4 APO-Distagon
Articles written for MediumFormat.com..
What to look for in a binocular, plus reviews..
Focus accuracy and focus shift..
Questions and answers on photography and computers and more..
High performance prime lenses for Sony NEX and Fujifilm X..
Accurate focus and ease for your eyes..
Zeiss ZF.2 and Zeiss ZE Lenses For Canon and Nikon.
Lenses for Leica M cameras, especially the M9.
Infrared Cameras Compared: Fuji S3 Pro UVIR, Nikon D70-IR, Canon EOS 5D-IR ..
Bread and butter all-around zoom..
Setup, IBIS performance, focusing..
Setup, IBIS performance, focusing..
Moderate wide angle expressly designed for Nikon Z cameras..
- Introduction to Nikon NIKKOR Z 35mm f/1.8
- Aperture Series: Log Jam at Outlet of Bear Lake
- Focus Comparison: Refocusing for Each Aperture vs Focusing Wide Open (Stunted Aspen Amid Boulders)
- Aperture Series: Creekside Aspen
- Aperture Series: Twisted Aspen Trunks, Evaluating Focus Accuracy in Dim Light
- Examples Handheld: Bishop Creek (Validating Focus Accuracy of the Nikon Z7)
Mid-range zoom expressly designed for Nikon Z cameras..
Blackout-free 20 fps speed demon..
Attention to details: a big upgrade over the A7R..
Attention to details: a solid upgrade over the A7R II..
Sensor stabilized 24MP full-frame..
Compact macro lens focusing to 1:1..
Top-grade medium telephoto..
Native-mount macro length designed by Zeiss..
Outstanding fast wide angle, DSLR optical design..
Macro lens also excellent for all-around shooting..
Anything wider would be a fisheye..
Fast lens speed with curious rendering..
Fast lens speed for versatile rendering..
Ultra high grade performer at a modest price..
Speed to match the Leica Noctilux..
Speed to match the Leica Noctilux-M, based on Mitakon Zonghyi optics..
Comapact ultra-wide zoom for Sony full frame mirrorless..
Wide mid-range zoom targeted at video shooters..
Premiere telephoto zoom for Sony full frame mirrorless.
Compact long range telephoto zoom for Sony full frame mirrorless.
Fixed 28mm lens with APS-C sensor free of anti-aliasing blur with wonderful color..
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..
A fast moderate wide angle..
Fast portrait lens..
Native Micro Four Thirds macro lens..
Beautiful bokeh, long reach fast speed, compact lens..
High performance super telephoto..
Ultra fast medium telephoto manual focus lens..
A worthy upddate to the E-M5 with pro-grade build quality..
Wide angle zoom equivalent to 15-36mm.
Apodization filter version of the 56/1.2..
24 or 16 megapixels in a compact body with APS-C sensor..
Moderate wide angle for Sony NEX..
Manual focus lenses for Sony Full-Frame Sony Mirrorless..
Outstanding wide angle, superb performer..
Zeiss autofocus lenses Sony full-frame mirrorless..
Autofocus wide angle for Sony full-frame mirrorless..
All-around slightly wide angle/normal with close focus..
Autofocus portrait lens for Sony full-frame mirrorless..
Moderate telephoto macro lens for Sony NEX or Fujifilm X. Useful on full frame too!.
Leica’s 28-70mm APS-C compact camera..
Leica M mount in slim body with SL-type sensor..
Specific issues affecting usability..
Overall design and behavior..
24-megapixel interchangeable lenses, high-res EVF..
All-arounder zoom with dubious optical compromises..
High resolution digital rangefinder.
Focal lengths, color, weight and travel considerations. [relevant, but dated/old material].
Leica’s ultra wide angle zoom lens..
Leica’s fastest and widest 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..
Tweaked 2016 redesign..
Leica’s smallest and lightest M lens with superlative performance..
Leica’s superlative and most natural lens for the M..
Leica’s f/2 35mm for the M..
World’s fastest 50mm full-frame lens..
The world’s best 50mm lens is outstanding, but with some limits..
Ghosting and veiling and ring flare pre/post production fix..
Leica’s compact low-distortion normal lens..
Leica’s ultra high grade and ultra fast modern short telephoto..
Leica’s retro telephoto..
General discussion of R lenses on M..
World’s best mid-range telephoto lens..
Compact and ultra high performance long telephoto..
Fast and ultra high performance moderate wide angle rangefinder lens..
All around razor sharp performer..
Fasted 35mm lens for Leica M, great ergonomics..
Blog posts, reverse chronological
2018-08-25 Nikon Z7: Pinpoint AF
2018-02-14 New Zeiss Loxia 25mm f/2.4 Distagon
2017-08-26 Nikon D850: Metering and Autofocus
2017-08-26 Nikon D850: Focusing and Metering
2017-06-21 REVIEWED: New Zeiss Milvus 35mm f/1.4
2017-06-20 Leica M10 Coming This Week
2017-06-02 Nikon AF-S 28mm f/1.4E ED
2017-01-18 Leica M10: Inertial Design
2016-09-19 Olympus 25mm f/1.2 PRO
2016-09-01 Sony FE 50mm f/2.8 Macro
2016-07-25 Leica SL Focusing Errors
2016-05-10 Sony FE PZ 28-135mm f/4G OSS
2016-05-05 Shipping: Sony FE 70-300mm f/4.5-56 G OSS
2016-04-18 Sony A7R II: Configuring Autofocus + Eye AF
2016-03-31 Sony FE 70-300mm f/4.5-56 G OSS
2016-02-03 Sony A6300, and the Fujifilm X-Pro2
2016-02-01 Canon EOS-1D X Mark II
2016-01-08 Leica SL: Focus Point Bug
2015-12-09 Sony RX1R II Autofocus: Ruined the Shoot
2015-09-18 Hartblei 40mm, 80mm, 120mm SuperRotators
2015-08-26 Announced: Canon 35mm f/1.4L II
2015-07-28 Leica S Typ 006: Autofocus Errors
2014-11-09 Zeiss Loxia Ergonomics and Focusing
2014-05-13 Canon Announces 16-35mm f/4L IS
2014-03-03 Autofocus Done the Right Way
2014-01-05 Sigma SD1 Merrill: Autofocus Errors
2013-10-10 DSLRs Still Have no EVF Option
2013-10-03 Canon 200-400mm
2013-09-15 Fujifilm XF 23mm f/1.4 R
2013-05-20 Autofocus with Sony NEX-7
2013-05-10 Sony NEX-7 Autofocus Insanity
2013-04-24 Reader Comment: Autofocus Accuracy
2013-03-17 Sigma 150mm and 180mm f/2.8 APO-Macro DG HSM
2013-02-10 Sigma 35mm f/1.4 DG HSM: Autofocus Portraits
2012-10-15 Sigma DP1 Merrill — Autofocus Accuracy
2012-09-17 24-Megapixel CMOS Leica M (Typ 240)
2012-09-14 Shitty Products
2012-09-02 Reader Comment: Autofocus Accuracy
2012-08-11 Nikon D800 / D800E autofocus Precision
2012-07-09 Errors with Nikon Contrast-Detect Autofocus
2012-05-10 Leica 50mm f/2 APO-Summicron-M ASPH
2012-04-25 Nikon D800 / D800E Focusing Aid (Eye)
2012-04-14 Fuji X-Pro1+ 35/1.4 Examples
2012-04-10 Nikon D800 Autofocus Accuracy
2012-03-29 Nikon D800 Focusing Screens
2012-03-27 Canon 5D Mark III Examples, Focusing, Noise
2011-09-17 Fuji X100 Focusing Note
2011-08-17 Product Photography: Autofocus Helps
2011-06-26 Which Macro Lens for 1:1 or Better?
2011-04-25 Autofocus Doesn’t Cut It
2011-04-24 Nikon AF-S 60mm f/2.8G Macro Lens
2011-01-12 Nikon 35mm f/1.4G focusing update
2010-12-21 Leica S2 focusing fact and fiction
2010-05-10 Nikon 24mm f/1.4G autofocus study published!
2010-05-09 Nikon 24mm f/1.4G autofocus survey results
2010-05-08 Nikon 24mm f/1.4G autofocus hugely erratic
2009-12-28 Zeiss ZF.2 lenses — focusing feel
2009-10-26 Focusing screens for your DSLR
2009-06-13 Canon 5D Mark II focusing
2008-12-16 Zeiss ZE 50mm f/1.4 Planar for Canon EOS
2008-08-14 Focusing screens for the Nikon D3
2008-07-09 Nikon D3 focusing mystery solved!
2008-05-12 Followup on Nikon D3 focusing
2008-03-25 Star focusing
2007-08-28 Focusing screens for Canon EOS
2007-07-03 Focusing on infinity / shooting stars