Archived posting to the Leica Users Group, 1998/03/30

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Subject: Re: [Leica] slide vs. print film for PhotoCD
From: Five Senses Productions <fls@5senses.com>
Date: Mon, 30 Mar 1998 13:40:59 -0800

At 11:07 PM 3/29/98 -0500, Thomas Kachadurian wrote:
>Francesco:
>At 02:29 PM 3/29/98 -0800, you wrote:
>>Velvia is 160/80 lpmm, Super G 100 is 125/63 lpmm, and Kodak 
>>Royal Gold 25 is 200/80 lpmm.  Velvia is the slide film with the 
>>highest tested resolution, and Royal Gold 25 (AKA Ektar 25) is the
>>highest resolving print film. 
>
>Whoops, my mistake. I must have the wrong Fuji Neg film. Perhaps it is
>Reala that has higher lpmm. Also, I'm getting this resolution data from the
>Midwest Fuji Pro rep (not the sharpest guy). I can tell you that the neg
>film makes a much better scan than Velvia from both PhotoCD and my Nikon
>LS-1000. I know those from experience. 
>
>I'm still a Velvia man, though. I just love the color palate.
>
>I'm no expert on permanence, but I'll bet there's one lurking here.  As I
>understand it, the problem is not inherent, but negative lines tend to be
>less exact and more prone to contamination. Also, it seems that
>manufacturers have more emphasis on permanence with slide film. 
>
>Kodachrome is a different beast altogether. It is really a layered B&W film
>and doesn't use color dyes at all. It's as close as you can get to archival.
>
>Tom
> 
>>
>>I never knew this.....I always was taught that slide film would present the
>>better quality enlagement and scan.  For these reasons I put up with the
>>inconvenience of slides.  I would be head over heels if I found a print film
>>that scanned better and enlarged better than Velvia!  I think Royal Gold 
>>25 may do it.......I'll get my test PhotoCD of scanned RG 25 negs back
>>on Monday afternoon.
>>
>>If both are stored under optimum conditions, how much longer than 
>>negatives do slides last?
>>
>>
> 

Francesco Sanfilippo,
Five Senses Productions
webmaster@5senses.com


http://www.5senses.com/