From: Sandy King (sanking@clemson.edu)
Date: 12/01/02-02:14:16 PM Z
Phillip wrote:
First, thanks for the information, and I have some follow-up
questions and comments.
>e you'll need to interpolate the data to scale up to 13x19, (I'm
>assuming the target is for a 2880dpi or 1440dpi inkjet printer)
>use the true optical resolution of the scanner. (2400spi)...
That is correct. Will be printing with either an Epson C80 at 2440dpi
or with a 2000P at 1440dpi.
> If I'm not
>mistaken, this scanner is capable of two pass scanning which you
>can use to extend the dynamic range.
If so I can't find anything about that in the manual. However, since
I am scanning negatives, would there be any advantage to extending
the dynamic range?
> I recommend Vuescan software over
>Epson's.
I am working with SilverFast, not the Epson Twain software. If
Vuescan better than SilverFast?
> When you res-up the image in Photoshop or livepicture,
>use a final ppi of 360 for the image. (this will give you slightly better
>printer software interpolation).
>
>Using plug-ins such as MrSid or Genuine Fractals Print Pro (both from
>LizardTech, Inc.) to res-up your image will give you a slight advantage
>over
>Photoshop's engine.
Is there a site for downloading these files?
>
>Needless to say, if your goal is transcribing the negative or transparency
>with accuracy, a film scanner will yield superior results hands down
>unless you're
>working with something on the order of a Heidelberg flat-bed scanner.
I have to say that the quality I am getting from the Epson 2450 with
the 5x7 negatives is really very good. Mark Nelson did a scan earlier
this year for me from a 5X7 B&W negative using his Imacon Flextight
scanner, at about 1600 dpi. I scanned the same negative with the
Epson 2450 at the same resolution and frankly if there is any
difference in image quality between the 13X19" comparison prints I
made from the two scans it is not visible to my eyes. Mind you I am
not saying that the 2450 is as good as an Flextight but for this
particular application it appears to be.
Best,
Sandy
>
>best regards,
>
>Phillip
>
>
>Sandy King wrote:
>
>> I have a scanning resolution question.
>>
>> Situation is this. I am scanning a 4 X 6.5" section of a 5X7" color
>> negative with the Epson 2450 flatbed scanner, which has optical
>> resolution of 2400 dpi, using SilverFast scanning software as a
>> plug-in to PhotoShop. The eventual purpose of the scans is to make
>> color prints approximately 13X19" in size, or to make negatives for
>> alternative printing. I understand that a maximum resolution of a
>> little over 300 dpi at the printing size is needed for either purpose.
>>
>> My question is this. What are the pros and cons of of the two
>> following scenarios: 1) scanning at 100% of the 4 X 6.5" negative
>> size at the maximum optical resolution of 2450 dpi, re-sizing later
>> in PhotoShop, or 2) scanning at the desired printing size of 13X19"
>> 300dpi?
>>
>> Sandy King
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