EXCERPT page containing first few paragraphs. 2021-12-08 16:32:05
UA_SEARCH_BOT_null @ 18.104.22.168
This page shows two frames at f/1.4, shot 4 minutes apart. Using 100% Live View, I could not tell the difference in the center between the two—yet the results are significantly different. This is why I shoot and shoot and shoot, and publish only when I am sure of an issue.
Depending on a tiny fraction of a millimeter rotation of the focusing ring, either these two images could result. The core issue is that this sample is not symmetric, That, and there is virtually no focus “throw” available at infinity with autofocus lenses. Perhaps this lens sample is in spec, but those specifications need tightening: this sample is unacceptable compared to the first excellent sample I first used in September 2016, particularly on the 45-megapixel Nikon D850.
Article continues for subscribers...
Diglloyd Advanced DSLR is by yearly subscription. Subscribe now for about 16 cents a day ($60/year).
BEST DEAL: get full access to ALL 8 PUBLICATIONS for only 68 cents a day ($249.95)!
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.