[pure-silver] Re: big lenses for big cameras
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Fri, 17 Sep 2004 10:40:32 -0700
----- Original Message -----
From: <Laurence.Cuffe@xxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Friday, September 17, 2004 4:10 AM
Subject: [pure-silver] Re: big lenses for big cameras
> On 15 Sep 2004 at 3:53, Richard Knoppow wrote:
>
>> On 14 Sep 2004 at 14:37, Curt Hagenlocher wrote:
>>
>> > > http://www.schneiderkreuznach.com/neuheiten/fine_art_xxl_e.htm
>> > An image circle that's nearly a meter across? That's
>> > sick!
>> > I'd wonder how much these "big boys" cost, if I had
>> > even a
>> > prayer of affording one...
>> > Curt Hagenlocher
>> > curt@xxxxxxxxxxxxxxx
>> Theres no harm in asking, though I don't think anything
>> which will come
>> with your name engraved on it is going to be cheap.
>> Probably better to
>> just spend the money on film.
>> All the best
>> Larry Cuffe
> Well I asked, and was told that production will begin
> early next year, and
> no price had been fixed.
> In the computer industry I think this is what is termed
> "vapour ware"
> They asked me to contact a UK agent after photokina, which
> is
> something which slightly annoys me as being in the euro
> zone I don't
> understand why I should take exchange rate risk when
> dealing with a
> european company.
> All the best folks
> Larry--
> Laurence Cuffe UCD Ireland
>
Perhaps they are feeling out the potential market. It
can't be very large. There are a lot of old process lenses
around which will cover this format. A lens like an
Apochromatic Artar will just about cover a circle equal to
its focal length at infinity focus although this is larger
than its specs indicate. While most process lenses were of
shorter focal length they were available in FLs up to about
1 meter. The most common focal length was 19", nearly 500mm.
The required image circle for a 20x24 film is around 800mm.
If a wide angle lens was desired a Dagor would do it. Dagors
were available in some focal lengths longer than 12" as
f/7.7 lenses. Without looking at my old catalogues I can't
be sure of the longest FL but it was certainly at least 15".
At f/45 a 17" Dagor would just cover the format. "Normal" FL
for 20x24 is 31" or 787mm. Again, process lenses wee made in
this sort of FL.
I can not imagine Schneider being able to build these
lenses in very small numbers for less than perhaps $5000 US
or more each. While the performance would probably be better
than the old lenses of similar focal length I wonder if it
would really be significant for the intended formats.
---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
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