< and compressed air from a rather healthy air compressor (not damaging neg,
What PSI are you using as your threshold?
----- Original Message -----
From: "jimhayes" <firstname.lastname@example.org>
Sent: Wednesday, September 19, 2001 7:48 AM
Subject: Re: filmscanners: Dust in Sprintscan 4000?
> > On Sat, 15 Sep 2001 08:41:04 -0400 Barbara & Martin Greene
> > (email@example.com) wrote:
> > > I'd
> > > appreciate if users of the Sprintscan would tell me just how much
> > > shows up in their slide scans.
> In my SS 4000 35 mm frames, which are mainly Tmax 100, I did a rough count
> once. I chose moderately (one stop) underexposed negs or night shots, so
> dust specks/hairs would show up. I scanned with Vuescan at 16 bit straight
> through to photoshop and enlarged to 100% and went around the frame and
> dust specks. I live in a semi-arid area and humidity ranges from 20-50%RH.
> store the negs in mylar sleeves, thumb cut from the side from "Light
> Impressions" (and stored in their folder/ box system) to avoid insertion
> scratches. I shoot each neg with an anti-static gun, and compressed air
> rather healthy air compressor (not damaging neg, however), and I wear high
> quality cotton gloves. Then I examine negative at an angle under good
> and I almost never see any dust remaining on neg (keep reading tho). I
> air cleaner (HEPA) in the room 24/7, overated for the size of room, and I
> the door closed with a seal on the bottom, and all windows closed, except
> permanently window mounted air conditioner. Yada, yada...
> The count varies from 200-1000 spots per frame. I think a lot is due to
> climate and the increased resolution of scanner, or maybe I should
> the air more than I do. The highest numbers come from a processing lab in
> (dip and dunk). The lowest numbers come from rolls I have processed myself
> used a 2 micron water filter at one point) or even better, a little outfit
> New Mexico which actually still does roll tank processing, with fresh
> solutions, etc, specializing in B&W only. Since I am VERY low volume, I
> mind spotting away for two hours or more, as long as I can get up every
> hour to take a quick screaming break.
> Hopes that helps.
> Jim Hayes
> Digital Surrealism
> Images at http://www.jymis.com/~jimhayes