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

[Les Newcomer]

Actually both cells are 23 1/4".  you should be able to remove the 
front lens and use the rear without a problem.


Les


On Monday, March 17, 2003, at 04:20  PM, Jim Hemenway wrote:

> Hi Folks:
>
> Thanks for the replies, I've decided on the 600mm.  It's free and a
> Symmar and/or Sironar are not.  I broke the bank when I bought the
> Symmar-S 360mm. It is clearly the best lens in my 11x14 kit.
>
> I spent some time the last several days making more 11x14 paper
> negatives with various lenses and developing them in the kitchen sink 
> at
> night with all lights out except the safe light. Did you know that just
> a little bit of moonlight will fog the paper?  I ended up taping
> newspapers over the kitchen windows above the sink for a few days... I
> wonder what my fancy suburban Winchester neighbors thought of that.
>
> The 210mm Apo-Gerogon and the 300mm APO Ronar will cover 8x10 well.  
> The
> 420mm APO Ronar covers 11x14 okay but the corners are blurry... it is
> marginally acceptable for 11x14 at tiny apertures.
>
> I also tried the Protarlinse 300mm which came with my 8x10 Kodak Master
> camera, clearly not enough coverage for 11x14.
>
> The other Protar, the shutter of which was fixed by SK Grimes, turns 
> out
> to have a lot of coverage for the 11x14.  This lens has two aperture
> scales, (23 1/4 and 13 inches) and is the one which gave me severe
> overexposure on the first try... I was probably using the wrong 
> aperture
> scale.  This afternoon, I'm now wondering if it isn't a convertible.
> The front element is marked 23 1/4 inches and the rear has no focal
> length marked on it at all. Together they appear to focus on infinity 
> at
> 300mm+ or about 13 inches. Would it make sense that the front element
> can be used alone as a 23 1/4 lens?
>
> I've scanned all of the 11x14 paper negatives and plan to put together 
> a
> web page of/with them this week.
> -- 
>
> Jim - http://www.hemenway.com
>
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