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Leica MTF Analysis / Summilux, Elmarit, Elmar 24mm

Examples on this page are with the three Leica 24mm lenses.

Measurement distance is infinity for Leica MTF charts (unless otherwise noted). Leica MTF charts are for 5/10/20/40 line pairs per millimeter, yielding a very useful overall signature . They can be compared with Zeiss charts using the 10/20/40 lines.

Leica 24mm f/1.4 Summilux-M ASPH

The 24/1.4 is a very modern design, but like all 24mm lenses, it has to make some serious design tradeoffs. Both field curvature and distortion had to “give” (per Leica priorities), and a strong wave-type field curvature is present (see f/2.8), which means it won’t deliver crisp images on planar subjects, even at f/5.6.

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  • Technique section discusses every aspect of making a sharp image handheld or on a tripod.
  • Depth of field and how to bypass depth of field limitations via focus stacking.
  • Optical aberrations: what they are, what they look like, and what to do about them.
  • MTF, field curvature, focus shift: insight into the limitations of lab tests and why imaging performance is far more complex than it appears.
  • Optical aberrations: what they are, what they look like, and what to do about them.
  • How to test a lens for a “bad sample”.

Intrigued? See Focusing Zeiss DSLR Lenses For Peak Performance, PART ONE: The Challenges, or (one topic of many) field curvature.

Aperture series 2.8, 5.6 available in full article
Leica 24mm f/2.8 Elmarit-M @ f/2.8
Mouse over to see f/5.6

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