At 11:24 21/09/2000 +1000, you wrote:
>Murphy, Bob H <[EMAIL PROTECTED]> wrote:
> > Why won't a piece of white paper under exposed by 2-1/3rd stops produce
>the
> > same exposure as an 18% gray card?
>
>Because a grey card photographed with a 28mm lens at 2 metres won't be full
>frame? The main t
Message-
> From: Roman Kielich® [SMTP:[EMAIL PROTECTED]]
> Sent: Thursday, September 21, 2000 6:55 AM
> To: [EMAIL PROTECTED]
> Subject: Re: Nikon Apparent Grain (was Re: Nikon
> LS-30/Vuescanquestions)
>
> At 11:24 21/09/2000 +1000, you wrote:
> >Murphy, Bob H &
Roman Kielich <[EMAIL PROTECTED]> wrote:
> All modern films have a multilayer construction, each R, G, B - sensitive
> layer consists of 2 or 3 layers of different speed (grain size). The
bigger
> the grain, the bigger the speed. If you underexpose a film, you record an
> image in more sensitive l
Murphy, Bob H <[EMAIL PROTECTED]> wrote:
> Another option (that would yield the same exposure) is to
> use a spot meter on the white paper and expose normally.
> This will yield the same number of photons reaching the
> film as spot metering on a gray card.
As it happens, I already used spot mete
