2x III Extender on Canon 70-200 2.8 IS v1?

Started Sep 27, 2012 | Discussions thread
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wallybarthman Regular Member • Posts: 360
Re: 2x III Extender on Canon 70-200 2.8 IS v1?

What aperture are you using with the converter?

My rule of thumb in using converters is to stop down 1/3 to 1/2 of a stop for a 1.4x, a full stop for a 2x. So when I shoot a 70-200 f/2.8 + 2x converter I'm shooting at f8.0.

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