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Aperture Series: Mosaic (Pentax K-1 SuperRes)
This finely detailed scene at far focus distance is an exceptionally demanding subject that makes mincemeat of most lenses, mercilessly revealing every weakness, lack of symmetry, etc. Most lenses require f/5.6 or f/8 to sharpen the whole mosaic.
The Pentax 43mm f/1.9 is a “pancake” lens with 7 elements in 6 groups. The expectations should be clear: the 43/1.9 is almost certainly designed for bokeh qualities and compactness. It almost certainly has field curvature and some measure of focus shift. Thus this target is going to be about as non-ideal as it gets for the 43mm f/1.9.
Here is what Pentax has to claim:
The ultra-compact smc PENTAX -FA 43mm F1.9 Limited lens offers exceptional high-contrast, high-resolution optics with minimal aberrations. It features the acclaimed smc multi-layer coating to lower surface reflection, reduce ultraviolet rays, and deliver clear, high-contrast images.
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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.
