EXCERPT page containing first few paragraphs. 2017-10-22 17:42:39
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This series puts the Sigma 135mm f/1.8 DG HSM Art against the Nikon 70-200mm f/2.8E FL ED VR. As of mid 2017 these are two of the finest lenses available in the 135mm range. So how does a high-grade prime lens stack up against Nikon’s finest zoom?
A key expectation of a prime lens is a low level of field curvature. Similarly, a zoom can be expected to have more field curvature at least over much of its range. This comparison is an ideal showing of how a top-grade prime fares versus a top grade zoom in terms of field curvature, and why “quick tests” equate to ignorance of real lens performance: one has to understand what is actually going on with a lens, not shoot flat test targets. This scene shows just how tricky it is to compare lenses fairly.
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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 28 megapixels filling up to 5K display, 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.