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Another experiment in DSLR scanning with the Pentax K-1 and Pixel Shift.
This is a half-frame (18x24mm) crop of a 35mm frame. But I see higher quality versus a full frame scanned on an Epson. For this picture, it really needed such a tight crop as most of the image was distracting and unnecessary. It's great that the 4X resolution boost of this digitization method makes that possible, at least when a fine-grained film is used. There was also an increase in both highlight and shadow detail. In testing, the ideal aperture for detail was f/10, but anything from f/8-f/11 gives extremely good resolution. -1/3 exposure compensation was used so as not to clip shadows or highlights on this contrasty film - it filled 95% of the histogram.
The Peak District, Derbyshire.
Linhof Technikardan S45
Schneider-Kreuznach Super-Symmar 5.6/110 XL
LEE ProGlass 0.6 hard GND
10mm front fall
f27
1/8th second
Fuji Velvia 50
Lab development
Digitised using 16-shot pixel-shift capture with a 99 CRI light source and an IT8-calibrated custom profile.
Best viewed fullscreen in the lightbox (Press L + F11)
Photo taken with the new Pentax K-1. Testing the PIxel Shift feature with the moon... Finale image cropped to 1:2. See next image for comparison with the K-3II
This shot is wide open and focused on the center of the image, the base of the rightmost group of branches. The actual focus is about 4-6 cm towards the camera. This lens design experiences focus shift, with a close image like this focusing about 2 cm toward infinity for each f-stop closed. That implies that it will focus accurately somewhere around f/2.8 to f/4. Which may be pretty good, as the lens should be sharp there. However, when using it wide open I'll need to remember to step forward a couple inches after focusing. Further testing is required, I didn't use f/2-f/4 on this roll. Everything is great at f/5.6.
Pentax K-1, SMC A* 200mm macro, 15 stacked images.
First experiments using pixel shift mode to enhance detail.
MCCP0176-MCCP0191 PMax_tu8
This boulder marks the intersection of two fault lines; a small one, running diagonally from top-right to bottom-left, and the Highland Boundary Fault, running front to back.
The zoom lens has compressed perspective, but for a sense of scale, the foreground rock in the right is maybe 15-20' away.
Linhof Technikardan S45
Schneider-Kreuznach Apo-Symmar L 5.6/210
15mm front fall
f45
1/2 second
Fuji Provia 100F
Gitzo GT3532LS
Arca-Swiss Z1
Lab development
Digitised using 16-shot pixel-shift capture
Note: my images are processed to appear correct on a calibrated, professional grade colour-accurate monitor set to Adobe RGB output / 6500 K temperature / gamma 2.2. Many consumer grade screens (particularly mobile phone screens) at default settings will display these images with too much saturation and contrast, so please bear this in mind when viewing on such devices.
(Best viewed fullscreen in the lightbox)