Sharpness and Blur by Optics
Blur from optical behavior or subject-related issue..
optical behavior in which the centering of the zone of sharpness changes with stopping down
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2024-04-14 100 Megapixels coming to a Sony A7R VI ?
2024-02-08 Please Fix This Nikon: no Sequence Number for 'Focus Shift' or Pixel Shift
2024-01-29 Hasselblad X2D: Stopped-Down Manual Focus to Compensate for Focus Shift
2023-11-29 Articles by Lloyd on Zeiss Lenses
2023-07-05 Nikon Z8 Focus Stepping (“Focus Shift”) for Focus Stacking
2023-05-29 Reader Comment: “Given up on Sony A7R V automatic focus shift shooting/focus bracketing”
2023-03-14 Lens Sharpness, and Why Optical Focus Shift is the #1 Suckiest Lens Compromise
2022-11-27 Hasselblad XCD 55mm f/2.5 Focus Shift Evaluation, Ruler
2022-11-27 Hasselblad XCD 38mm f/2.5 Awful Focus Shift: Lens Should Not Have Made it Into Production
2022-08-18 Fujifilm GF 110mm f/2 Focus Shift Evaluation and Mitigation: Deck and Roof (GFX100S)
2021-08-20 Voigtlander FE 35mm f/2 APO-Lanthar: Focus Shift vs Focus Position, Greenstone Lake
2021-07-07 Voigtlander FE 35mm f/2 APO-Lanthar: Focus Shift in Landscapes, Patriarch Grove
2021-05-07 Test Protocol for Focus Creep / Unstable Lens Focus
2021-05-04 Reader Question: Testing for Focus Shift
2021-05-03 Fujifilm GF 50mm f/3.5 Aperture Series: Deck Planks (massive focus shift)
2020-09-27 Evaluating Focus Shift with the Sigma FE 28mm f/1.4 DG HSM Art
2019-06-28 Zeiss Otus 100mm f/1.4 APO-Sonnar: Focus Shift
2019-05-27 Leica 90mm f/2 APO-Summicron-SL Aperture Series: Mosaic, Focus Shift (Panasonic S1R)
2019-05-26 Focus Shift, a General Discussion
2019-01-31 Sigma 40mm f/1.4 DG HSM Art Aperture Series: Mining Gears (Nikon Z7)
2019-01-20 Sigma 40mm f/1.4 DG HSM Art Aperture Series: Painted Rock (Nikon D850)
Blur from optical behavior or subject-related issue..
Elusive sharpness, depending on aperture.
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.
24-Megapixel vs mirrorless..
All-arounder zoom with dubious optical compromises..
Fast short wide angle lens for L-Mount cameras..
Fast apochromatic prime lens for L-Mount cameras..
Fast short telephoto lens for L-Mount cameras..
The best becomes better..
Unprecedented support for focus stacking in full-frame DSLR..
Nikon’s finest 70-200 zoom as of 2017..
Which speed zoom for the Nikon D800/D800E?.
Ultra fast 200mm with gorgeous bokeh and high resolving power..
Ultra wide tilt/shift lens.
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 image stabilized 35mm..
Extraordinary optical efforts for outstanding performance..
Extraordinary optical efforts for outstanding performance..
Extraordinary optical efforts for class-leading performance?.
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!.
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..
Canon’s premium mid-range zooms..
A fast moderate wide angle lens with some practical difficulties..
State of the art design in a fast 35mm lens..
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..
Focus shift assesments of a wide variety of lenses of various brands. Shows a range of apertures for each lens and the mount of focus shift, discusses how to compensate for it..
Wide angle 24mm equivalent for Phase One XF system.
100 megapixels in a portable package!.
Compact wide angle.
Moderate wide angle equivalent to 37mm f/2.3..
Slightly wide compact normal lens equivalent to 41mm f/2.9..
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..
25mm equivalent..
Normal lens equivqlent to 32mm..
37mm equivalent..
Normal lens equivqlent to 45mm..
Medium format telephoto lens, 74mm equivalent..
Medium telephoto macro lens for Pentax 645 digital and film..
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..
Ultra high performance apochromatic normal lens, first in the Otus line..
Razor sharp with gorgeous bokeh..
True-to-life imagery..
Untapped potential for greatly improved image quality..
Focus accuracy and focus shift..
Bread and butter all-around zoom..
Bread and butter all-around zoom..
High speed portrait lens optimized for Canon mirrorless..
Setup, IBIS performance, focusing..
Setup, IBIS performance, focusing..
Setup, IBIS performance, focusing..
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..
High performance, high speed..
High performance mild wide-angle..
Fast and gorgeous moderate wide angle Zeiss design..
High performance, high speed..
Outstanding wide angle, watch out for lens skew..
Outstanding fast wide angle, DSLR optical design..
Macro lens also excellent for all-around shooting..
Fast mild wide angle lens..
High-grade manual focus wide-normal lens..
Comapact ultra-wide zoom for Sony full frame mirrorless..
Wide mid-range zoom targeted at video shooters..
A weak sibling covers the wide end.
Moderate wide angle for Sony NEX..
Outstanding wide angle, superb performer..
Tweaked 2016 redesign..
Tweaked 2016 redesign of Leica’s petite performer..
High performance but flawed 50mm normal lens..
Compact lens for portraiture or similar..
Superb all-around macro and general-purpose lens..
Fast and ultra high performance moderate wide angle rangefinder lens..
2024-04-14 100 Megapixels coming to a Sony A7R VI ?
2024-02-08 Please Fix This Nikon: no Sequence Number for 'Focus Shift' or Pixel Shift
2024-01-29 Hasselblad X2D: Stopped-Down Manual Focus to Compensate for Focus Shift
2023-11-29 Articles by Lloyd on Zeiss Lenses
2023-07-05 Nikon Z8 Focus Stepping (“Focus Shift”) for Focus Stacking
2023-05-29 Reader Comment: “Given up on Sony A7R V automatic focus shift shooting/focus bracketing”
2023-03-14 Lens Sharpness, and Why Optical Focus Shift is the #1 Suckiest Lens Compromise
2022-11-27 Hasselblad XCD 55mm f/2.5 Focus Shift Evaluation, Ruler
2022-11-27 Hasselblad XCD 38mm f/2.5 Awful Focus Shift: Lens Should Not Have Made it Into Production
2022-08-18 Fujifilm GF 110mm f/2 Focus Shift Evaluation and Mitigation: Deck and Roof (GFX100S)
2021-08-20 Voigtlander FE 35mm f/2 APO-Lanthar: Focus Shift vs Focus Position, Greenstone Lake
2021-07-07 Voigtlander FE 35mm f/2 APO-Lanthar: Focus Shift in Landscapes, Patriarch Grove
2021-05-07 Test Protocol for Focus Creep / Unstable Lens Focus
2021-05-04 Reader Question: Testing for Focus Shift
2021-05-03 Fujifilm GF 50mm f/3.5 Aperture Series: Deck Planks (massive focus shift)
2020-09-27 Evaluating Focus Shift with the Sigma FE 28mm f/1.4 DG HSM Art
2019-06-28 Zeiss Otus 100mm f/1.4 APO-Sonnar: Focus Shift
2019-05-27 Leica 90mm f/2 APO-Summicron-SL Aperture Series: Mosaic, Focus Shift (Panasonic S1R)
2019-05-26 Focus Shift, a General Discussion
2019-01-31 Sigma 40mm f/1.4 DG HSM Art Aperture Series: Mining Gears (Nikon Z7)
2019-01-20 Sigma 40mm f/1.4 DG HSM Art Aperture Series: Painted Rock (Nikon D850)
2018-10-14 Must Read: Nikon Z7 Aperture/Lens Diaphragm Behavior While Viewing/Focusing vs Focus Shift in Lenses
2018-08-31 Zeiss Lenspire Articles—Read all 17
2018-07-31 Reader Question: Focus Shift with Nikon Mirrorless
2018-07-07 Sigma 105mm f/1.4 DG HSM Art Assessed for Focus Shift: Wooden Surface of Picnic Table
2018-01-30 Fujifilm GFX Does not Always Focus at Full Aperture, Could it Be Compensation for Focus Shift?
2017-12-04 Articles by Lloyd on Zeiss Lenses
2017-11-14 Deep Stacking with the Sigma 85mm f/1.4 DG HSM Art Using Nikon D850 'Focus shift shooting'
2017-11-08 Nikon D850: Validating 'Focus shift shooting' in the Field: Does it really work well?
2017-10-25 Nikon D850: 'Focus Shift Shooting' at Close Range
2017-10-07 Nikon 14-24mm f/2.8G ED Focus Shift Case Study: Lee Vining Canyon Fresh Snow (Nikon D810)
2017-08-29 New Article on Zeiss Lenspire Site: “Micro Contrast and the Zeiss 'Pop'”
2017-08-27 New Article on Zeiss Lenspire Site: “Zoom or Prime Lens? Normal Lenses”
2017-05-22 New Article on Zeiss Lenspire Site: “Zoom or Prime Lens? A series by Lloyd Chambers”
2017-05-16 Nikon Appears to be Doing Focus Shift Compensation, at Least with the Nikon D810 and 70-200/2.8E
2017-05-16 Nikon 70-200mm f/2.8E FL ED VR: Focus Shift at Close Range @ 70mm, 130mm, 200mm
2017-03-28 Followup: Fujifilm GFX and 120mm f/4 Focus Shift Problems
2017-03-27 Followup: Fujifilm GFX and 120mm f/4 Focus Shift Problems
2017-03-10 Fujifilm GFX + 120mm f/4 Macro: Focus Shift Summarized with Two Additional Proofs
2017-03-08 Fujifilm GFX 50s + 63mm f/2.8 Aperture Series: Yellow House at Dusk
2017-03-08 Reader Question: Focus Shift (stems from Fujifilm GFX findings, but applies to all brands) 📹
2017-03-07 Fujifilm GFX 50s + 120mm f/4 Macro Plus Aperture Series at Distance: Baseball Diamond
2017-02-20 Hasselblad XCD 30mm f/3.5 Evaluation at MOD (Minimum Object Distance)
2017-02-16 New Article on Zeiss Lenspire Site: “Zoom or Prime Lens? A series by Lloyd Chambers”
2017-02-11 Hasselblad X1D with XCD 90/3.2 Aperture Series: White Anthurium
2017-02-08 Hasselblad X1D + Hasselblad XCD 45mm f/3.5 Aperture Series: Storm Drain Signs
2017-02-08 Hasselblad X1D + Hasselblad XCD 45mm f/3.5 Aperture Series: Pomegranates on Picnic Table
2016-12-18 Zeiss Milvus 18mm f/2.8 Aperture Series: Frosty Picnic Table
2016-10-15 Reader Question: Focusing with Sony Mirrorless
2016-04-16 Sony G Master 85mm f/1.4 Aperture Series: Understanding Behavior, Particularly Focus Shift
2016-02-08 Leica v2016 28mm f/2.8 Elmarit-M ASPH Assessment of Focus Shift at MOD
2016-02-08 Leica v2016 28mm f/2 Summicron-M ASPHAssessment of Focus Shift at MOD
2016-01-03 Leica SL: Evaluation of Focus Shift at 49mm for Leica 24-90mm f/2.8-4 Vario-Elmarit-SL
2016-01-03 Leica SL: Evaluation of Focus Shift at 90mm for Leica 24-90mm f/2.8-4 Vario-Elmarit-SL
2015-04-11 Sony FE 35mm f/1.4 Distagon: Assessing Focus Shift and Color Correction (Dolls, Sony A7R)
2014-11-30 Sony FE 16-35mm f/4: Aperture Series at 35mm Pumpkin + Mitigating Focus Shift
2014-10-17 Zeiss 21/2.8 Distagon: Focus Shift Assessment
2014-10-17 Focus Shift Compared: Nikon 20/1.8G vs 14-24/2.8
2014-10-16 Focus Shift Nikon 20/1.8G vs 14-24/2.8
2014-08-01 Panasonic Leica 15mm f/1.7 DG Summilux ASPH: Focus Shift Study
2014-07-30 Sigma 50mm f/1.4 DG HSM A vs Nikon 50/1.4G and 50/1.8G (Nikon D810)
2014-07-01 The Effect of Focus Shift on Image Sharpness
2013-08-10 New Features for Finding Stuff at diglloyd.com
2013-08-03 Leica 35mm f/1.4 Summilux-M ASPH: Field Curvature and Focus Shift on a Planar Subject
2013-07-26 Leica 35mm f/1.4 Summilux-M ASPH: Glacial Erratics and Focus Placement (Leica M Typ 240)
2013-04-09 Close Range Performance with Leica 50mm f/2 APO-Summicron-M ASPH
2013-01-11 Canon EF 40mm f/2.8 STM: Aperture Series with Focus Shift Analysis
2012-12-30 Compared: Canon EF 35mm f/2 IS vs 35mm f/1.4L vs 24-70mm f/2.8L II (Dolls) + Focus Shift Assessment
2012-10-20 Mitigating Focus Shift in the Field (Nikon D800E + Nikon 14-24)
2012-07-30 Focus Shift — Zeiss 50mm f/2 Makro-Planar and Zeiss 50mm f/1.4 Planar
2012-07-30 Focus Shift — Why So Much Coverage?
2012-07-29 Focus Shift — Canon 50mm f/1.2L, Canon 50mm f/1.4, Canon 50mm f/1.8 II
2012-07-29 Canon 50mm f/1.2L Focus Shift — Extensive Study
2012-07-07 Focus Shift with the Nikon AF-S 14-24mm f/2.8G on D800E
2012-06-21 Why Don’t Nikon and Canon Compensate for Focus Shift? (Hasselblad Does!)
2012-06-19 Nikon AF-S 85mm f/1.4G on D800E, Focus Shift Study
2012-06-14 Focus Shift Study for Nikon AF-S 35/1.4G and 35/1.4 AI-S on D800E
2012-06-12 Focus Shift Study for Nikon AF-S 24mm f/1.4G on D800E
2012-06-11 Focus Shift with Nikon 14-24mm f/2.8G @ 24mm on D800E (with 24-70 f/2.8G as reference lens)
2012-06-10 A Study of Focus Shift With Six 28mm Lenses
2012-06-08 Nikon AF-S 28mm f/1.8G Focus Shift
2010-05-11 Nikon 24mm f/1.4G focus shift and color bokeh page
2009-04-30 Focus shift article
2008-11-11 Focus shift on a resolution chart
2008-11-10 More focus shift: 35mm, 100mm, 135mm, more
2008-11-10 Focus shift in fast 50mm lenses
2008-11-10 Focus shift in 85mm lenses
2008-11-10 A brief introduction to focus shift
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