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EXCERPT page containing first few paragraphs. 2022-08-16 00:10:12

Leica 30-90mm f/3.5-5.6 Vario-Elmar-S ASPH

Aperture Series @ 30mm: Mossy Boulders in Pescadero Creek (S006)

This scene evaluates the Leica 30-90mm at 30mm. Autofocus was used on the green grass near center, and it did a find job deciding, delivering accurate focus.

Equivalent f-stop for depth of field

As compared to 35mm full frame, the Leica S sensor is 1.25X larger linearly (45 X 30 mm vs 36 X 24 mm), so the equivalent f-number factor for depth of field is 1.25X.

f/3.5 ~= f/2.8 on 35mm
f/5.6 ~= f/4.5 on 35mm
f/8 ~= f/6.4 on 35mm
f/11 ~= f/8.8 on 35mm
f/13.5 ~= f/10.8 on 35mm
f/16 ~= f/12.8 on 35mm

Note: the Leica S reports in EXIF data f/13.5 as f/13 (rounds it off). It also rounds f/9.5 to f/10. These are bugs. See the half-stop f-stop table.

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Diglloyd Medium Format covers medium format camera systems, including the Hasselblad X1D and Fujifilm GFX.

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.
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  • 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.
Aperture series 3.5,5.6,8,9.5,11,13.5,16 available in full article

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