[pure-silver] Re: looking for a 240-300mm enlarging lens
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Sat, 19 Feb 2005 17:44:07 -0800
----- 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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