Re: What settings are needed to achieve maximum resolution from an Epson V850?
It's true that people often overestimate how much detail they really resolve on film, but a scan doesn't necessarily only deal with scene information. Grain rendition might also be important. On my Cezanne, for instance, scanning at higher spi's give's a much better rendition of film grain than scanning at lower resolutions. I scan 35mm film at 6000 spi, and I do so because I ran a bunch of comparison scans.
Re: What settings are needed to achieve maximum resolution from an Epson V850?
just liking the look of what comes out of a scanner is something completely different than resolution.
All flatbeds and I susepct all scanners create their own grain. Its a misguided impression that what you see from a scanner is "film grain". You scanner will fundamentally alter the film grain and there's nothing you can do about that. The grain you see ain't the same as the grain in the neg.
So all scans are a form of interpolation. I'm not saying that's bad, I'm just saying it happens as part of a scan and if scanning at 6000spi gives you scans you like the look of then fine. But it's scan grain you're seeing not actual film grain.
35mm film shot at say F5.6 has the potential for much higher film resolution but only with the right films and lighting. But a 200 cycles/m film could give you 160 cycles/m so in theory that would require a 4000 spi scan at a minimum. So yes 35mm film can sometimes require those high scan resolutions. But I rekon most of the time they won't Becasue it will be rare that you get as much 80 cycles/m. There just isn't the resolution in the film to extract.
Re: What settings are needed to achieve maximum resolution from an Epson V850?
so to answer the OPs question, shoot at f4 using a film with capability of 400lp/mm and in suitable lighting that gives very high local contrast in the fine detail of your subject.
Then you might approach getting your scanners max resolution and actually be able to see it and NOT be lead into the false opnion that the scanner is not capable just because unwittingly you have not taken into consideration the fact that the resolution didn't exist in your film to extract in the first place.
Re: What settings are needed to achieve maximum resolution from an Epson V850?
Re: What settings are needed to achieve maximum resolution from an Epson V850?
By "film grain" I mean the coarse pattern seen in an enlargement, following the very common colloquial use, and not the much smaller grains of silver.
Re: What settings are needed to achieve maximum resolution from an Epson V850?
"My guess is that the scanning lens and/or sensor is optimized for the frequency of green light."
I'm only 6 1/2 years late to the party! Anyway, this would imply - but I could be wrong - that Bayer filtering is involved, since there are more green pixels than red or blue. (Note: I'm not an expert.)
Dave
Quote:
Originally Posted by
Ken Lee
See this
resolution test of an Epson V750 by
Nathan Potter.
The test shows that once we get past 1500 dpi the contrast drops below 50% - a sort of practical cutoff point for
usable resolution.
I routinely scan at 2400 dpi (because the menu gives either 1200 or 2400 and I'm reluctant to type in an intermediate number) knowing that there's no usable resloution beyond that point. I tested the higher settings and found no discernible advantage.
One way to get slightly better data is to scan in 48-bit color, discard the Blue and Red channels and use only the Green channel. See
http://www.kennethleegallery.com/htm...nningGreen.php.
My guess is that the scanning lens and/or sensor is optimized for the frequency of green light.