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Re: [OM] A new toy.

Subject: Re: [OM] A new toy.
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Sun, 11 Oct 2009 12:02:27 -0400
Wow!  That's a pretty nice piece of gear.  I don't really need one but 
would L-O-V-E to have one.  It's really a depth guage calibrated in 
diopters for the depth of the curve necessary for a given radius and 
thus given focal length.

Chuck Norcutt

Moose wrote:
> One of our friends in New England uses me as the dumping ground for odd 
> bits of techie stuff she no longer wants, buts would prefer to give to 
> someone she imagines will use, or at least enjoy them.
> 
> A couple of years ago, it was two Oly cameras, a Stylus 35-70 and a 
> D-460. This year it is a lens diopter measuring gauge. 
> <http://galleries.moosemystic.net/MooseFoto/index.php?gallery=Tech/Misc&image=LensGauge.jpg>
> 
> She was at one time an optician, but no longer. And I suppose they 
> aren't much use nowadays in that job, anyway.
> 
> I have no practical need for it, but love having it. It helps keep the 
> old fashioned techie who keeps a mechanical stop watch on his desk and 
> plays with mechanical cameras happy. Another beautifully made mechanical 
> device. :-)
> 
> Fun to play with. I have, for reasons not clear to me*, a set of 37mm 
> close-up lenses. The front surface of the +1 is +5 diopters and the back 
> surface -4, for a net of +1 diopter.
> 
> Then the "No. 1" of a set of Vivitar C-U lenses is about +5.1 and -4.4. 
> for a net of +0.7 diopter and the "No. 3" is +2.6 diopter.
> 
> The brass mounted magnifying glass in my desk drawer is +2.6 on each 
> side, total +5.2, so a focal length of ~200 mm.
> 
> Moose
> 
> * Aha! For the video camera.
-- 
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