[LargeFormat] Process lenses... which one should I get?

[philip.lambert]

I mounted a 300mm lens on a relatively short technical camera by using a
piece of rainwater downspout as a 4 inch tubular extension.  How long is
your bellows?  My briefly-owned 10x8 hardwood and leather camera had a
maximum stretch of one metre but rigid it wasn't.  If the 420mm ApoRonar
covers 11x14 at 1:1 it must be working at 840mm so on that basis an 890mm of
the same design should cover 11x14 at infinity. On the other hand the
diagonal of 11x14 looks like 450mm so the 600mm should suit but the ApoRonar
is very much a narrow lens. And dim. I suppose you will use a black hat as a
shutter.  I daren't ask what the cost per exposure is. Philip
----- Original Message -----
From: "Jim Hemenway" <jim@hemenway.com>
To: "Large Format Group" <largeformat@f32.net>
Sent: Friday, March 14, 2003 8:44 PM
Subject: [LargeFormat] Process lenses... which one should I get?


> Gents:
>
> I need your collective help/advice.
>
> I have a pick of one of two process lenses from the same man who gave me
> the Rodenstock APO-Ronar CL 420mm... the one with great coverage for the
> 8x10, but so-so for the 11x14 because of its small angle of view at
> infinity... it covers 11x14 well at 1:1.
>
> The lenses offered are 600mm and 890mm and are from the same process
> camera.  I haven't checked my bellows to see if it will extend to 890mm.
>
> He's offering me only one of them... which one will give me the best
> coverage?
>
> --
> Jim - http://www.hemenway.com
>
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