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Leica 16-18-21mm f/4 Tri-Elmar-M ASPH

16 vs 18 vs 21: 16-18-21/4 Tri-Elmar-M ASPH (Alpine Canyon)

This page shows the difference in field of view at 16mm, 18mm and 21mm, along with large crops taken from the same area of the sensor, to show relative quality differences.

When one needs a little more stretch (say an interior that just will not fit), the 18mm or 16mm setting might be just the ticket over a 21mm view.

Multi-focal or single focal length?

While the ability to choose 16/18/21mm focal lengths instantly in one lens is appealing, an alternative is to use dual prime lenses: the 18/3.8 Super-Elmar-M and the 21/3.4 Super-Elmar-M pair along with the M-18 and M-21 viewfinders. Two prime lenses yield high image quality and a little more lens speed, and also a smaller and lighter camera when shooting.

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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.

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.

Variants 16mm, 18mm, 21mm available in full article

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