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Re: [OM] Inexpensive way to macrophotography

Subject: Re: [OM] Inexpensive way to macrophotography
From: "Terry and Tracey" <foxcroft@xxxxxxxxxxxxxxxxxxxxxx>
Date: Sat, 17 Jan 1998 18:16:09 +1100
> Hmm.  Doesn't it go the other way?  50/135=.37  That's 1/3 magnification
> not 2.7x. If I put a 50mm reversed on a 50mm, I get 1:1 magnification.  If
> I put the 50mm on a 100mm I get a 1:2 magnification.  A 50 on a 200 would
> give you 1:4 magnification.  You will only get greater than life size by
> reversing a longer focal length on a shorter focal length.  For example, a
> 50mm reversed on a 35mm is 50/35=1.4x magnification.  A 200mm reversed on a
> 50mm will give you 4x magnification (and serious vigneting too).
> 
> ...when in doubt, reference John Shaw's books...

John Shaw's book says magnification is prime lens/reversed lens.
135/50=2.something.

Foxy

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