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EXCERPT page containing first few paragraphs. 2021-09-28 04:30:25

Mandatory Lens Correction
Leica 24-90mm f/2.8-4 Vario-Elmarit-SL ASPH

Distortion @ 24mm and 90mm, Uncorrected and Corrected (Cerro Gordo Museum Interior)

These examples show the uncorrected versus corrected distortion. Since Adobe Camera Raw enforces lens corrections for Leica SL DNG files (for native lenses and for M lenses), these images were converted using Iridient Developer.

The Leica SL corrects distortion during Live View so that the recorded image can capture significantly more than the Live View image shows.

Toggle to compare the uncorrected versus corrected image.

Distortion @ 24mm

Distortion is extreme to the point of looking like a fisheye lens, so correction is mandatory to avoid a fun-house-mirror effect. Measuring the imaging area in Photoshop, about 5600 pixels of the 6014-wide sensor are used for the corrected image, or 86% of the sensor area. In effect, the Leica SL is 20.8 megapixel camera when the 24-90mm is zoomed to 24mm.

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Variants Uncorrected,Corrected available in full article
f8 @ 6.0 sec, ISO 100; 2016-06-09 19:14:12
LEICA SL (Typ 601) + Leica 24-90mm f/2.8-4 Vario-Elmarit-SL ASPH OIS @ 24mm

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