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Experience Report: Adjusting Autofocus Accuracy with the Nikon 105/1.4E
See Sensor Resolution: Technical Challenges in Exploiting It.
This page walks through the process of getting a lens to focus accurately on the Nikon D850, in the field and in a way that can be applied most anywhere without needing special targets. It shows before (“out of the box”) and what a huge difference it can make to use the AF fine-tune feature, that is, an unusable blurred image to a beautifully crisp one.
Two samples of the 45-megapixel Nikon D850 have shown a flange focal distance error with my Zeiss lenses that might be related to two Nikon AF lenses being so far off as to deliver unusable images out of the box—the 105/1.4E and the 14-24/2.8G.
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Diglloyd DAP is DSLR-oriented, but also contains workflow and other topics. Much of the focus is on Canon and Nikon but also Pentax and Pentax medium format.
Special emphasis is placed on lens evaluation, focusing on Canon and Nikon and Sigma lenses, but with a few others like Rokinon/Samyang.
- Make better images by learning how to get the best results right away.
- Save money by choosing the right lens for your needs the first time, particularly some of the new Sigma Art lenses vs Nikon and Canon.
- Workflow discusses image organization, raw conversion and post processing. Many examples show processing parameters for direct insight into how the image was converted.
- Jaw-dropping image quality found nowhere else utilizing Retina-grade images up to full camera resolution, plus large crops [past 2 years or so].
- Real world examples with insights found nowhere else. Make sharper images just by understanding lens behavior you won’t read about elsewhere.
- Aperture series from wide open through stopped down, showing the full range of lens performance and bokeh.
- Optical quality analysis of field curvature, focus shift, sharpness, flare, distortion, and performance in the field.
Want a preview? Click on any page below to see an excerpt as well as extensive blog coverage, for example on Nikon or on Canon or on Pentax.
