100mm f/2.8 Non-USM Macro Question

Started Sep 20, 2012 | Discussions thread
Lionswings
Junior MemberPosts: 33
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Re: 100mm f/2.8 Non-USM Macro Question
In reply to Le Kilt, Sep 20, 2012

Le Kilt wrote:

berze wrote:

You mean this one :

http://www.canon.com/camera-museum/camera/lens/ef/data/macro/ef_100_28macro.html ? That's pretty old.

My guess, "limited" limits AF to 0.3-0.5m, while "full" let's him hunt for focus in his entire reach (0.3 to infinity, which slows it down a lot).

For info, the equivalent switch on the USM version selects between 0.31m to infinity and 0.48m to infinity.

Thank you both for the info and link.
Rod

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