How a lens blurs when out of focus is a Big Deal..
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Sharpness loss by focusing or zone of sharp focus..
Sharpness loss by camera or support or technique..
- Blur by Camera Movement
- Blur by Mirror Slap
- Shutter Vibration / Shutter Shake vs Electronic First Curtain / EFC Shutter
- Examples of Blur by Shutter Vibration / Shutter Shake
- Blur Caused by System Alignment
- Blur Caused by Image Stabilization
- Resolving to Sensor Resolution
- Blur Caused by Anti-Aliasing Filter
- Blur Caused by Digital Capture
- Blur Caused by Demosaicing
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
- Case Study: Major Sharpness Gains via Ideal Focus with Lenses having Peripheral Forward Field Curvature (Pine Creek High Peaks)
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
- Focus Assist Error (Electronic Rangefinder), Nikon D3x
- 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..
- How to Hold a Camera Steady (Mass Coupling)
- How to Press the Shutter Release
- Mirror Lockup and Remote Release for Sharper Photos
- Self Timer and Mirror Delay
- Enabling and Testing for Electronic First Curtain Shutter (EFC Shutter)
- Key Aspects of Tripod Stability
- Live View Overview
- Alternatives to Live View
- Using Mirror Lockup With Canon DSLRs
- Live View Settings With Canon DSLRs
- Step-by-step Live View for Canon
- Canon Silent Shoot Mode for Zero Vibration
- Mirror Lockup and Self Timer on Nikon
- Using Live View With Nikon DSLRs
- Step-by-step Live View for Nikon
- Mirror Slap in Live View Mode on Nikon
- Seven Things Nikon Could Fix or Improve for Sharper Images
Controlling the zone of sharp detail..
- Depth of Field As a Creative Tool
- Circle Of Confusion
- What are F-stop and T-stop?
- Format-Equivalent Depth of Field and F-Stop
- Case Study: Format-Equivalent F-Stop: Micro Four Thirds vs 35mm Full Frame (Pellegrino)
- Case Study: Format-Equivalent F-Stop: APS-C vs 35mm Full Frame (Pellegrino)
- Depth of Field at the Periphery
- Delay in Depth of Field by Double-Image Bokeh
- Delay in Depth of Field by Color Divergence
- What is Acceptably Sharp?
- Practical Tips
- Example: Sensor Size and Focal Length (Bottles)
- Depth of Field (Photo Techniques Nov/Dec 2009 PDF)
Best practices for shooting stacking frames..
Getting peak performance from your lens.
- Diffraction—Resolution Taxed to Its Limits
- Influence of Pixel Size
- Example—Resolution Chart
- Field Example (San Francisco, Canon 1Ds Mark III)
- Diffraction Limits for High Resolution DSLR (Dolls, Nikon D7100)
- Diffraction Flare with Stopping Down (Barn Interior)
- Diffraction: Resolution Taxed to Its Limits (P.T. Jan/Feb 2009 PDF)
How to verify a good sample and assess all aspects of lens performance..
- My Approach to Testing a New Lens
- Know Your Goals
- General Issues
- Choosing a Test Scene for Evaluating Sharpness
- Focus Targets
- Focusing Accuracy When Testing
- Testing and Adjusting Autofocus Accuracy
- Eliminating Camera Movement when Testing
- Ruling Out Camera/Sensor Alignment
- Checking for a Good Sample
- Comparing Lenses
- Testing for Focus Shift and Secondary Color
- Testing for Field Curvature
- Testing for Lateral Chromatic Aberration
- Testing for Longitudinal Chromatic Aberration (LOCA)
- Testing for Bokeh
- Testing for Autofocus Accuracy
- Testing for distortion
- Testing for Flare
- Downloadable High-Res Ruler Target
Stability of tripods and ballheads, controlling camera vibration, selecting equipment..
- Overview of Tripod Stability
- Tripod vibration and resonance
- Mirror lockup vs Exposure Delay, focal length
- Shutter Speed and Critical Sharpness on a Tripod
- Sharpness on Light/Medium/Heavy Tripods
- Sharpness with Mirror Lockup, Exposure Delay, VR
- Shooting Technique: Steadying the Lens
- Tripod Performance for Burst Shooting
- Tripod Collars: Wimpy or Strong
- General Conclusions on Tripods/Shooting
Articles written for MediumFormat.com..
- Exploring Medium Format, an Outdoor Perspective
- Maximize Image Quality with Shot Discipline, Part 1: Introduction, Focusing (November 2018)
- Maximize Image Quality with Shot Discipline, Part 2: Depth of Field and Diffraction, Focus Stacking (December 2018)
- Maximize Image Quality with Shot Discipline, Part 3: Eliminating Camera Vibration, Handheld Shooting (January 2019)
- Maximize Image Quality with Shot Discipline, Overview with Key Tips
- Maximize Image Quality with Shot Discipline, Part 4: Optimal Exposure (February 2019)
- 100 Megapixel Medium Format: Perspectives from Field Use of the Hasselblad H6D-100C (April 2019)
4th Generation standard-setting camera..
Blog posts, reverse chronological
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