EXCERPT page containing first few paragraphs. 2019-03-22 12:20:23
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In aperture/depth of field terms, it is like a 28mm f/2.8 a 35mm full-frame camera, so it is a relatively slow lens, even considering the sensor size. This keeps the lens reasonably compact and light weight and reasonably priced.
The optical formula makes significant efforts to raise image quality, including one glass-molded aspherical element, one hybrid aspherical element, and a high refractive index low dispersion element. These optical efforts show in the field results; it’s a shame that Pentax did not utilize similar efforts with the PENTAX D FA 645 55mm f/2.8 AL [IF] SDM A.
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These systems are hugely expensive, so make the right choice for your own needs (full frame vs medium format).
- In-depth lens evaluations covering behaviors not likely to be found anywhere else, based on real-world field shooting.
- How to configure menus and buttons and best operating practices, gotchas and how-to.
- Real world examples with insights found nowhere else. Make sharper images just by understanding lens and camera behaviors.
- Jaw-dropping image quality found nowhere else utilizing Retina-grade images up to 28 megapixels filling up to 5K display, plus large crops.
- 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.