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Blog Articles Medium Format Mirrorless L-Mount DSLR Zeiss Leica Making Sharp Images BW+IR

focus accuracy

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2023-10-22 Commentary on Fujifilm GFX100 II

2013-07-25 MTF vs Field Curvature and Tips for Optimizing Focus

2013-04-24 Reader Comment: Autofocus Accuracy

2013-02-17 Sigma 35mm f/1.4 DG HSM: Autofocus Portraits After Fine Focus Adjust

2013-02-17 Focus Accuracy: Focusing Screens for f/1.4 Lenses in Canon, Nikon

2013-02-10 Sigma 35mm f/1.4 DG HSM: Autofocus Portraits

2013-02-10 Autofocus Accuracy: Sigma 35mm f/1.4 and Nikon AF-S 35/1.4G using Lens Align and Fine Focus Adjust

Fujifilm GFX100S

100 megapixels in a body the size of a 35mm DSLR!.

1. Fujifilm GFX100S: Field Examples of Autofocus Errors
2. Fujifilm GFX100S: Focus Precision and Accuracy with Fujifilm GF 35-70/4.5-5.6 @ 58mm
3. Fujifilm GFX100S: Focus Precision and Accuracy with Fujifilm GF 50mm f/3.5

Fujifilm GFX 50R Operational Aspects

Experience, reader insights, etc..

1. Focusing Protocol for Aperture Series

Fujifilm GF 32-64mm f/4 R LM WR

Mid-range zoom lens equivalent to 26-53mm f/3.3..

1. Aperture Series @ 32mm: 9050 Pine Creek Rd (GFX 50S)
2. Aperture Series @32mm: Cerro Gordo Museum (Focus Variability + Right-Side Blur) (GFX 50S)

Nikon Z7 Overview, Setup, General

Setup, IBIS performance, focusing..

1. Nikon Z7 Aperture/Lens Diaphragm Behavior While Viewing/Focusing

Nikon Z7 IBIS and Focusing

Setup, IBIS performance, focusing..

1. Validating Focus Accuracy of the Nikon Z7, Extensive Field Shooting
2. Autofocus Accuracy: Zone of Focus Error, Example and Mitigation
3. Autofocus Accuracy: Pinpoint AF vs Magnified Live View Reference

Blog posts, reverse chronological

2023

2023-10-22 Commentary on Fujifilm GFX100 II

2013

2013-07-25 MTF vs Field Curvature and Tips for Optimizing Focus

2013-04-24 Reader Comment: Autofocus Accuracy

2013-02-17 Sigma 35mm f/1.4 DG HSM: Autofocus Portraits After Fine Focus Adjust

2013-02-17 Focus Accuracy: Focusing Screens for f/1.4 Lenses in Canon, Nikon

2013-02-10 Sigma 35mm f/1.4 DG HSM: Autofocus Portraits

2013-02-10 Autofocus Accuracy: Sigma 35mm f/1.4 and Nikon AF-S 35/1.4G using Lens Align and Fine Focus Adjust