RE: Dpi and line screen
RE: Dpi and line screen
- Subject: RE: Dpi and line screen
- From: "Mark Rice" <email@hidden>
- Date: Sun, 1 Jan 2006 11:38:36 -0500
- Organization: Zero One
I think we are not on the same wavelength here. My point is this: when I
used to scan 35mm film for LVT output, I found that I had to scan it at 6000
x 9000 pixels, to maintain the grain image of the film. This left us with
"original sharpness of the film". I recorded this on the LVT at the same
resolution. I assumed when I first started using a digital camera that I
would need the same number of pixels. Turns out that is not true. By using
some sharpness enhancement (which can be pushed further than it can on
film, because there is no grain to over-enhance), I could achieve nearly
equivalent results with 2000x 3000 pixels.
Something similar is true with screened images. When scanning film, I
found the 300dpi >150 lpi line screen to be a valid rule. But with a digital
camera image, I found that I could get very good results with 200 dpi > 150
lpi screen.
Mark Rice
-----Original Message-----
From: jc castronovo [mailto:email@hidden]
Sent: Sunday, January 01, 2006 10:43 AM
To: Mark Rice; email@hidden
Subject: Re: Dpi and line screen
----- Original Message -----
From: "Mark Rice" <
> Yes, I understand what you are saying, but in my experience,
> photographic printers, such as the Lambda and the LVT, require much
> more detail than screened devices. If I want to achieve good quality
> on the Lambda or LVT, I must scan at higher resolution than output
> resolution in order to hold all the detail that the grain of the film
> captures.
Why? In my experience I can't see the advantage to giving the LVT more
resolution than it can print on the film. The software would have to res it
down anyway, so why not just give it exactly what it wants in the first
place? It will print it 1:1 without any loss. Same with the Lambda. The
files can still be huge, but there's no need to go beyond final resolution
on account of the output device alone.
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