Re: Does MF color slides scanning in 24 bit still make sense
Re: Does MF color slides scanning in 24 bit still make sense
- Subject: Re: Does MF color slides scanning in 24 bit still make sense
- From: Mike Strickler <email@hidden>
- Date: Tue, 19 Jan 2016 17:11:15 -0800
Hi Martin. You know t's a funny thing, but grain does also get smoothed out quite a bit by the scanning oil. The effect is obvious when you look at the image inside an air bell (usually caused by some tiny particle lifting up the film around it. That part, which has no fluid on it, is definitely grainier looking, even when it's color negative film, which has no light-scattering silver grains and thus no Callier effect. I concluded that the minute swellings of the emulsion surface where silver grains had been before being bleached out are sufficient to scatter a bit of light, much as scratches do. Another good reason to wet-mount the film.
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> Message: 1
> Date: Mon, 18 Jan 2016 20:15:10 +0000
> From: Martin Orpen <email@hidden>
> To: "'colorsync-users?lists.apple.com' List"
> <email@hidden>
> Subject: Re: Does MF color slides scanning in 24 bit still make sense
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>
>> On 18 Jan 2016, at 18:47, Paul Schilliger <email@hidden> wrote:
>>
>> I did once some comparison scans when I worked with a drum scanner (a mid range one), wet and dry, and as far as super fine grain films are concerned, the gain was there when peeping at pixels, but at sight distance it was anecdotal. But the trouble of wet mounting is considerable. I thought it was better to scan dry, not to soak my precious slides into gels and solvents that might alter their life span. So, yes the process needs to be mastered and I am just supposing, but I'm expecting results that will please.
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> Oil mounting isn’t about reducing grain — you do that on a drum by opening the aperture manually and/or adjusting the focus point :)
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> You oil mount to stop light scattering when it hits the uneven (and scratched) surfaces of the film.
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> Reducing scatter as light passes through the film means you get more contrast and more detail.
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> It also gives you a very clean scan with no clean up required.
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> Also, oil and film cleaner don’t “soak” film — water is far more penetrating.
>
> --
> Martin Orpen
> Idea Digital Imaging Ltd
>
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