Scanning the weakest link

[Zorki>Leica]

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Flatbed scans are not up to the required resolution. Today the best choice for 35 mm is the Reflecta RPS 7200 professional, which practically tops at about 4000 LW/PH, 30% more than the theoretical limit of a D3X. I have in and an older Minolta 5400 II, both with a Vuescan driver.

 

Excellent optics (as most of Leica M, Zeiss ZF/ZM, Voigtlander aspherical and some Nikon and Canon) can drive the Minolta to the promised 5400 dpi (it has still 30% MTF left at 103 lp/mm, completely recoverable by good deblur) and the RPS 7200, with its smaller lens aperture, over 4000 dpi.

 

In practice, the Minolta attains slightly better results up to 40 x 60 cm 254 dpi prints with slides, while the Reflecta has an edge on negatives (less grain aliasing) and on prints over 50 x 75 cm (no software interpolation). Very fine details are slightly better with the Minolta, while the Reflecta has a less noisy CCD.

 

The Plustek does not have the important autofocus.

 

Elio

 

I wouldnt go over 4000dpi with the Minolta (I have one myself). The problem is, the Minolta has diff. peak resolutions on the two axes. On the horizontal axis the max resolution ist somwehere around 4500dpi, on the vertical around 3700dpi. This means, that when scanning with 5400dpi, the vertical axis is interpolated ("inflated" information rather than real information) by a fair amount, while the horizontal is still almost all real info.

[Kyler.]

Thought you guys might find this interesting.

 

http://www.rangefinderforum.com/forums/showthread.php?t=89032