[pure-silver] Re: Repurposing Enlargers
- From: Gerald Koch <gerald.koch@xxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Mon, 12 Dec 2011 15:09:59 -0800 (PST)
Camera lenses have a curved field of focus. So if your subject is in the
center
of the image the edges of the image will not be in focus at large apertures.
This can be used to isolate the subject from the background.
Lenses for BW enlargement need not be designed to focus all colors on the same
plane. Ctein had an article on this focus shift somewhere on the web.
For LF use you may not see any problems due to the small amount of enlargement.
Jerry
________________________________
From: Fred Rosenberg <fdr@xxxxxxxxxxx>
To: pure-silver@xxxxxxxxxxxxx
Sent: Mon, December 12, 2011 2:18:15 PM
Subject: [pure-silver] Re: Repurposing Enlargers
How do those flat field lens photos look that's distinguishable from camera
lens photos?
On 12/12/2011 11:10 AM, Tim Daneliuk wrote:
> On 12/12/2011 10:49 AM, Gerald Koch wrote:
>> Enlerger lenses are optinized to work at short distances and a flat field.
>> They
>>do not make very good camera lenses.
>> Jerry
>>
>
>
> I have a couple of Artar process lenses (a 14" Red Dot and a 19" APO)
> I had put into modern shutters that would argue this point with
> you. They are spectacularly sharp and work just fine at infinity.
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