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Thread started 26 Oct 2006 (Thursday) 11:42
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Extention Tubes and AF ?

 
dbiggs
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Oct 26, 2006 11:42 |  #1

if you use tubes do you lose auto focus?


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Billginthekeys
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Oct 26, 2006 11:46 |  #2

no. but it slows down, and hunts a lot in lower light. its a better idea to MF for macro shots anyway. but yes it will keep AF


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Jon
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Oct 26, 2006 11:48 |  #3

Depends on the tubes. Some cheap ones don't carry all the camera's signal lines forward to the lens. Kenko's will AF.


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Double ­ Negative
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Oct 26, 2006 12:05 |  #4

Nope. Not with the Kenko tubes I use, at least.


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JaGWiRE
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Oct 26, 2006 12:06 |  #5

Billginthekeys wrote in post #2172197 (external link)
no. but it slows down, and hunts a lot in lower light. its a better idea to MF for macro shots anyway. but yes it will keep AF

If you get a 1:1 dedicated macro like the 100mm f2.8 Canon, is it okay to use autofocus? I'm an AF junky (very very rarely use manual focus).


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Billginthekeys
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Oct 26, 2006 12:09 |  #6

JaGWiRE wrote in post #2172283 (external link)
If you get a 1:1 dedicated macro like the 100mm f2.8 Canon, is it okay to use autofocus? I'm an AF junky (very very rarely use manual focus).

well you see its just that the DoF is SO THIN at macro distances, that the slightest different in the focus means the target is in or out of focus, even stopped down. even on a dedicated lens its best to use MF. its just a different ballgame in macro world.


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Extention Tubes and AF ?
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