Time to upgrade 17-40/4 USM L

Started Sep 25, 2012 | Discussions thread
mvmv
Regular MemberPosts: 130
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Re: Time to upgrade 17-40/4 USM L
In reply to Steve Balcombe, Sep 25, 2012

Large apertures in wide angles still gives large DOF.

f 2.8, 17 mm, focus distance 4m, DOF 1,79m -> infinite

http://www.cambridgeincolour.com/tutorials/dof-calculator.htm

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