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by paulo on Thu Jul 30, 2009 1:00 pm
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paulo
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Location: Portugal
If I stacked 2 canon extension tubes of 25mm, but from diferent versions (the early EF25 and the new EF25 II), will I have any problems with autofocus on my 300mm f/4 IS lens. Do I need the 2 of the same version, so they work properly?

Need fast repply.

best regards,

paulo anjo
 

by Sidamo on Thu Jul 30, 2009 3:35 pm
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Sidamo
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You're fine. The latter version is for compatibility with EF-S lenses, that's the only difference.
 

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