Leica 16-18-21mm f/4 Tri-Elmar-M ASPH Aperture Series: Cattle Chute at Sunset (Leica M240)
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This aperture series was shot to explore general imaging characteristics.
In Guide to Leica:
Cattle Chute at Sunset (Leica M240 + Leica 16-18-21mm f/4 Tri-Elmar-M ASPH)
This f/4 - f/11 aperture series includes HD and UltraHD images as well as the usual crops.
Sharpness, field curvature and optimal aperture are explored here at the 16mm settings.