Sharpness loss by camera or support or technique..
Focusing is more complicated than it first appears..
Sharpness issues related to camera and lens tolerances and build quality..
How to verify a good sample and assess all aspects of lens performance..
The best becomes better..
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..
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..
Sigma’s fast an flexible moderate super telephoto..
A review of Canon’s new 70-200mm zoom, along with comparisons to other models and the 200mm f/2L IS. Extensive comparisons at multiple focal lengths..
Comparing the Canon 17-40mm f/4L and 16-35mm f/2.L II..
Adapting lenses delivers degraded results in most cases..
Normal lens equivqlent to 53mm..
Sharpness and rendering..
Rendering style, bokeh and beauty..
Rendering style, bokeh and 'transparency' without peer..
Articles written for Lenspire.ZEISS.com..
Tripods and items for technical excellence..
Focus accuracy and focus shift..
Good stuff and not so good stuff..
Photography Hints and Tips..
Canon’s first full-frame mirrorless..
4th Generation standard-setting camera..
Vibration from the shutter highly damaging to image sharpness..
Shutter vibration (or not)..
Compact ultra-wide angle lens..
High performance mild wide-angle..
High-grade manual focus wide-normal lens..
Fast extreme wide angle zoom..
Premiere mid-range zoom for Sony full frame mirrorless.
Eliminating the camera body barrier— any kind of lens with Live View EVF and LCD.
24 or 16 megapixels in a compact body with APS-C sensor..
Autofocus wide angle for Sony full-frame mirrorless..
Mirrorless Sigma Quattro larger APS-H sensor with interchangeable lenses..
How good is Leica quality control?.
ARCHIVAL MATERIAL. Eliminating the camera body barrier— any kind of lens with Live View EVF and LCD, and especially Leica M-mount.
HISTORICAL, please see Guide to Mirrorless..
Blog posts, reverse chronological
2020-10-18 Swing and Tilt: Subject Distance vs Lens Focusing Offset
2020-10-18 Analyzing Swing and Tilt of Sony A7R IV with Two Samples of Sony FE 12-24mm f/2.8 GM
2020-10-16 Update on Sony A7R IV Lens Mount / Sensor Parallelism, Lens Skew of Sony FE 12-24mm f/2.8 GM, Coming Field Shooting
2020-10-12 Lens Mount / Sensor Parallelism Inaccuracies Afflict All Brands
2020-10-08 Is It Even POSSIBLE to get a properly aligned Sony A7R IV?
2020-10-07 Sony A7R IV in for Repair of Lens Mount / Sensor Parallelism Problem
2020-06-15 Hasselblad XCD 65mm f/2.8 Aperture Series: View Over Alabama Hills Formations, Last Light on High Peaks
2020-02-19 Why I am Dragging my Feet with the Voigtlander 50mm f/2 APO-Lanthar: Possible Issue with Sony A7R IV Lens Mount Flange/Sensor Planarity
2019-02-26 Reader Comment: Panasonic S1R and its L-Mount Lens Choices Including Sigma DG HSM Art Lenses
2018-09-26 The Leica/Panasonic/Sigma Alliance L-Mount Alliance
2018-09-06 Implications of Flange Focal Distance for Adapting Sony Mirrorless Lenses for the Canon Mirrorless RF-Mount and Nikon Mirrorless Z-Mount
2018-09-01 Sigma DG HSM Art Lenses on Sony Mirrorless, and Implications for Nikon Z7 + Nikon FTZ lens Adapter
2018-08-30 Nikon Z7: Optical Design vs the Large-Diameter Z-Mount and Short 16mm Flange Focal Distance
2017-12-18 Update on Nikon D850 Flange Focal Distance
2017-11-29 Nikon D850: Back from Nikon for Checkup on Flange Focal Distance Issue
2017-11-13 Nikon D850: Flange Focal Distance Problem Means that my Zeiss Milvus 18/2.8 reaches End of Its Focusing Range at around 28°F and is Hosed when it goes colder.
2017-11-01 Nikon D850: Flange Focal Distance is WAY Off (2nd Sample)
2017-10-28 Nikon D850: the 2nd Sample is Off Also, both Skewed and Bad Flange Focal Distance
2017-10-17 Nikon D850, Priorities
2017-10-14 Nikon D850 Experience Report: Adjusting Autofocus Accuracy with the Nikon 105mm f/1.4E
2017-10-12 Nikon D850: Mine Also Has a Problematic Flange Focal Distance (way past infinity mark).
2017-10-01 Nikon D850: the Focusing Distance Issues Stem from a Sensor that is not Parallel to the Lens Mount (Nikon quality control issue)
2017-09-29 Nikon D850: Apparent Build Tolerance Error in Flange Focal Distance vs Optical Viewfinder, Causes Major Focus Error with Manual Focus Lenses and Focus Confirmation
2016-02-29 Sigma SD Quattro Mirrorless Cameras
2015-07-16 Left/Right Zone of Focus Skew: Not Always the Lens, the Sensor and Lens Mount Might not be Plane-Parallel
2015-07-06 Sony A7R II, Sony A7R III, Sony A7R IV with Zeiss Otus and other Lenses
2013-12-21 Sony A7R vs Sony A7
2013-12-01 Sony A7R: Lens Support and Lens Mount Torque with Adapted Lenses (Sag, Warp Potential, Shutter Vibration)
2013-09-15 Thoughts on a Full-Frame Sony NEX
2013-07-26 Making Sharp Images new page: Flange to Sensor Alignment, Fantasy Land MTF
2013-04-19 A Camera Plate for the Leica M Typ 240
2013-03-09 What Happens if the Sensor is not Exactly Plane Parallel to the Lens Mount? (UPDATE)
2013-03-01 What Happens if the Sensor is not Exactly Plane Parallel to the Lens Mount?
2012-12-12 Nikon 70-200/4: Torque on the Lens Mount vs 70-200/2.8
2012-01-12 Fuji X-Pro1 — Fujinon XF Lenses on X Mount
2012-01-02 Sony NEX-7: Avoid Subtle Damage to the Lens Mount
2010-03-06 Canon EF 200m f/2L IS
2009-10-08 Where is infinity focus?
2009-08-02 Ultra wide angle lenses and sensor/lens-mount alignment
2006-01-29 Nikon D2X lens mount and/or sensor misalignment