Canon DSLRs and Lenses 101 - Canon Digital Photography Forums

26th of January 2012 (Thu)

#14

Wilt

Cream of the Crop

Join Date: Aug 2005

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Re: Canon DSLRs and Lenses 101

Quote:

Originally Posted by AntonLargiader

By commonly accepted standards, a Macro lens needs a 1:1 magnification ratio, and I don't think there are any zooms that do this. .

Tamron is well known for its 90mm f/2.5 macro lens, and without its accompanying lifesize adapter tube (1:1) the lens only manages 1:2 with its own internal focusing mechanism. 'Macro' more generally is often added to a lens designation if it manages 1:4, as macro truly refers to 1:5 and larger (up to about 16X) according to past well established macrophotography reknown vendors like Olympus.

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Last edited by Wilt : 26th of January 2012 (Thu) at 09:25.

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