Phase One IQ4 + Schneider Kreuznach LS 40-80mm f/4-5.6 Aperture Series @ 80mm: Mosaic
2019-12-01 • SEND FEEDBACK | 
Related: focus skew, lens mount / sensor parallelism, lens skew, medium format, Phase One, Phase One 80mm f/2.8 AF, Phase One digital backs, Phase One IQ4 digital back, quality control, Schneider, Schneider Kreuznach, Schneider Kreuznach Lenses, Schneider Kreuznach LS, Schneider Kreuznach LS 120mm f/4 Macro
Related: focus skew, lens mount / sensor parallelism, lens skew, medium format, Phase One, Phase One 80mm f/2.8 AF, Phase One digital backs, Phase One IQ4 digital back, quality control, Schneider, Schneider Kreuznach, Schneider Kreuznach Lenses, Schneider Kreuznach LS, Schneider Kreuznach LS 120mm f/4 Macro
This aperture series look at performance of the Schneider Kreuznach LS 40-80mm f/4-5.6 at 80mm on a planar target at far distance. Key issues include sharpness across the frame and particularly peripheral forward field curvature and focus shift.
See also this same series shot with the Schneider Kreuznach LS 80mm f/2.8. Regrettably I did not shoot things as an A/B direct comparison, but conclusions about the relative performance can nonetheless be made.
One IQ4 + Schneider Kreuznach LS 40-80mm f/4-5.6 Aperture Series @ 80mm: Mosaic
Includes images up to full 150MP camera resolution (14204 X 10652) from f/5 through f/11 including 100 megapixel versions for perspective vs other medium format cameras, plus crops.
f8 @ 1/40 sec, ISO 64; 2019-11-29 08:54:27
Phase One IQ4 + Schneider Kreuznach LS 40-80mm f/4-5.6 @ 80mm
RAW: LACA corrected, USM {8,50,0}, SmartSharpen{120,0.7,0}
Phase One IQ4 + Schneider Kreuznach LS 40-80mm f/4-5.6 @ 80mm
RAW: LACA corrected, USM {8,50,0}, SmartSharpen{120,0.7,0}
[low-res image for bot] Bottom of frame cropped off
