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Bokeh and Blur

How a lens blurs when out of focus is a Big Deal..

Sharpness and Zone of Focus

Sharpness loss by focusing or zone of sharp focus..

Blur from Camera or Support

Sharpness loss by camera or support or technique..

How To Get Peak Sharpness With Perfect Focus

Focusing is more complicated than it first appears..

Focusing Accuracy (Case Studies)

Focusing accuracy and errors..

How To Banish Blur Whether Handheld or Tripod

Using your camera’s mirror lockup, self timer, and Live View features..

Depth of Field

Controlling the zone of sharp detail..

Focus Stacking Shooting Tips

Best practices for shooting stacking frames..


Getting peak performance from your lens.

How to Test A Lens

How to verify a good sample and assess all aspects of lens performance..

Research — Tripods and Camera Technique

Stability of tripods and ballheads, controlling camera vibration, selecting equipment..

Blog posts, reverse chronological


2023-03-14 Lens Sharpness, and Why Optical Focus Shift is the #1 Suckiest Lens Compromise

2023-01-30 Sony Pixel Shift: Why Sony 16-shot pixel shift is a Can’t-Lose Proposition


2022-09-10 Fujifilm GFX100S vs Hasselblad X2D 100C: Which is Better?


2019-11-22 Making Sharp Images: Case Study: Major Sharpness Gains via Ideal Focus with Lenses having Peripheral Forward Field Curvature (Pine Creek High Peaks)


2015-02-27 Sharper Images by Technique and Shot Discipline

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