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47MP Panasonic S1R
Leica 28mm f/2 Summicron-M ASPH

Aperture Series: Mosaic (Panasonic S1R)

This page evaluates performance of the Leica 28mm f/2 Summicron-M ASPH on the 47-megaixel Panasonic S1R from f/2.8 through f/8*. Aperture f/2.8 looks bad enough as it is so f/2 is not included and focusing difficulties with the S1R* rendered it dubious.

* The Panasonic S1R ultra high-res EVF is terrific but the Panasonic S1R magnified Live View implementation is fatally flawed when attempting precise focus, leading to focusing errors. Focus at f/2 was off too much; focus at f/2.8 was OK and at f/4 was perfect, due to rearward focus shift.

With each new mirrorless camera system, hope springs eternal even as basic physical facts are ignored. Optical design of Leica M lenses was for film (no sensor cover glass) or presumably for 0.8mm sensor cover class for newer lenses designed at the time of Leica M digital cameras—Leica does not indicate what the design parameters are with regards to digital

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Diglloyd Guide to LEICA contains in-depth coverage of Leica M system cameras and lenses, with additional coverage of Leica M Monochrom, Leica Q, Leica SL.

Special emphasis is placed on Leica M lenses and certain Zeiss ZM lenses.

  • 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 the Summilux/Summicron/Elmarit choice and/or Zeiss ZM.
  • Make better images, a sort of “cheat sheet” saving yourself months or years of ad-hoc learning. Processing parameters are discussed and shown.
  • 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 Leica.

Aperture series 2.8,4,5.6,8 available in full article

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