[pure-silver] Re: looking for a 240-300mm enlarging lens
- From: "Gene Johnson" <genej2@xxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Sat, 19 Feb 2005 19:35:40 -0800
What size neg and how big a print. I'm guessing 35mm and 8x10 or bigger.
Mag ratio too big.
----- Original Message -----
From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Saturday, February 19, 2005 5:44 PM
Subject: [pure-silver] Re: looking for a 240-300mm enlarging lens
>
> ----- Original Message -----
> From: "Jim Brick" <jim@xxxxxxxxx>
> To: <pure-silver@xxxxxxxxxxxxx>
> Sent: Saturday, February 19, 2005 5:31 PM
> Subject: [pure-silver] Re: looking for a 240-300mm enlarging
> lens
>
>
> > At 06:50 PM 2/18/2005, Graham Hughes wrote:
> >
> >>Shannon Stoney wrote:
> >> > What is a process lens, as opposed to an enlarging
> >> > lens?
> >>My understanding is that most process lenses are optimized
> >>for 1:1, and
> >>that an enlarging lens is designed to make little things
> >>big (as opposed
> >>to normal lenses, which make big things little).
> >>Functionally both
> >>types are mounted essentially in a barrel.
> >>
> >>Graham
> >
> >
> >
> > I have an APO Rodenstock copy lens that I use on my
> > Beseler slide copier. I
> > tried it in my enlarger once. Yuck! Could not make a sharp
> > print.
> >
> > Jim
> >
> These are special lenses that are meant for use at a
> fixed distance or magnification ratio. They are not
> compromised to make them work over a wide range. Many
> process lenses will work very well at infinity focus of you
> stop down a but. Probably this lens is very sharp in its
> intended application.
> ---
> Richard Knoppow
> Los Angeles, CA, USA
> dickburk@xxxxxxxxxxxxx
>
>
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