[pure-silver] Re: grain and focus
- From: Eric Nelson <emanmb@xxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Wed, 16 Apr 2008 15:50:07 -0700 (PDT)
I used to wish my skies weren't so grainy but once I
started using PMK I noticed that disappeared, esp.
with 120.
I can't speak to 35 so much, but with 120 I found that
PMK definitely made a difference.
Eric
--- Richard Knoppow <dickburk@xxxxxxxxxxxxx> wrote:
>
> ----- Original Message -----
> From: "Shannon Stoney"
> <shannonstoney@xxxxxxxxxxxxxxx>
> To: <pure-silver@xxxxxxxxxxxxx>
> Sent: Wednesday, April 16, 2008 12:48 PM
> Subject: [pure-silver] grain and focus
>
>
> >
> > I made some 35mm pictures last winter using an
> ancient
> > Leica and mostly HP5+. Some of the negatives are
> pretty
> > grainy, even when they're only enlarged to 4x6.
> The
> > graininess seems to happen in the out of focus
> areas, of
> > which there are a lot because the aperture was
> wide open
> > and many of the pictures were taken inside without
> a
> > flash. When I use this camera outside and
> everything's in
> > focus, there is usually no grain to speak of. Why
> is
> > there this relationship between apparent
> graininess and
> > out of focus areas?
> >
> > --shannon
> >
> >
> I think this is an optical illusion, the details
> of the
> image tend to suppress the visibility of the grain.
> Examining the negative through a strong magnifier or
> using a
> grain focuser on your enlarger should demonstrate
> this.
> Now also grain varies somewhat with the density
> of the
> image being greater for higher density. This is one
> reason
> for the old recommendation to make negatives as thin
> as
> possible while retaining good shadow detail.
> I have not used any HP 5 for a long time and
> don't
> rememeber what its like but, if grain is an issue
> you might
> try either Tri-X (ISO-400) or 400T-Max both of which
> are
> quite fine grain for film of this speed. Xtol is a
> good
> developer for both for minimizing grain without
> loosing
> speed.
>
> ---
> Richard Knoppow
> Los Angeles, CA, USA
> dickburk@xxxxxxxxxxxxx
>
>
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