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

[Jim Hemenway]

Hi Philip:

I hadn't thought of a tubular extension but that's a good idea. I think
that I can make a box which would fit into the present lensboard opening
and then mount the lens and lensboard on that.  I could then get enough
draw for infinity and a little closer.  Thanks for the idea!

A black hat shutter it is until I find that I have good enough coverage
to justify having SK Grimes mount it in a shutter.  Well that's assuming
that he has a big enough shutter... he mounted the 420mm in a Copal 3.

No one makes 11x14 transparency or color negative film any longer.  So I
use some Ektachrome 100 that's outdated by a year+.  I keep several
boxes that I was able to score on ebay in a freezer.  Each sheet cost me
$6.00 and processing is $15.00 each.  

For awhile B&H had some Fuji 11x14 film and I ordered some but then
received a message a month afterwards that they didn't have any after
all.

I have plenty now.
-- 

Jim - http://www.hemenway.com



"philip.lambert" wrote:
> 
> 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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