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Re: [OM] ( OM ) substitute for Sigma 14mm rectilinial

Subject: Re: [OM] ( OM ) substitute for Sigma 14mm rectilinial
From: "Brian Swale" <bj@xxxxxxxxxxxxxxx>
Date: Sat, 22 Aug 2009 07:27:52 +1200
Chuck wrote

> Maybe 35mm equivalents will make it easier to visualize.
> 
> A 110mm lens on 6x17 gives a 75 degree horizontal angle of view or 
> approximately the same as a 24mm lens on 35mm.
> 
> A 90mm lens on 6x17 give an 86 degree horizontal angle of view or 
> approximately the same as a 19mm lens.
> 
> Of course, the angular height of the 6x17 would not be like the 35mm
> equivalents.  It would be about like cropping the top half off a 35mm
> image.
> 
> ps:  The handiest calculator I've found for doing these kinds of 
> calculations for all kinds of different formats is here:
> <http://www.mhohner.de/formulas.php>  Scroll to near the bottom of the
> page to skip all the math and get to the calculator.

Thanks very much for this link and info. I have bookmarked his site.

Actually, "my" Rodenstock Granadon is 115mm, and using his calculator the 
FOV is 72.29° which is close to a 35mm lens of 24.5mm     72.61° - putting 
a finer point on it.

24mm on a 35mm camera is pretty wide by my usage, so at the very least 
the 155mm Granadon will be an excellent starting point for me with 6 x 17

Thanks for putting my concerns at rest!

Brian Swale. 
-- 
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