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Photography Question 
Rob Warwick
BetterPhoto Member Since: 4/27/2009
robdoc75.com
 

Teleconverters


Is a teleconverter (e.g., 1.4x or 2x) compatible with a Canon EF 70-300 1/4.5-5.6 lens? I know I won't be able to use AF, but will work with MF?

Thanks,

Rob


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1/25/2010 12:46:14 PM

 
Gregory LaGrange
BetterPhoto Member Since: 11/11/2003
gregorylagrange.org
  It's not compatible with that zoom lens. It's compatible with the 70-200L f/2.8 and the 100-400L f/4.5-5.6 and the L series fixed telephotos of 135mm and above.
You can use autofocus as long as the lens that you put it on has a max aperture of at least f/4 with the 2x extender.
Manual focus will work as long as you can turn the focusing ring.


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1/25/2010 1:25:49 PM

 
Jon Close
BetterPhoto Member Since: 5/18/2000
  Canon's and Sigma's teleconverters will not fit that lens. Their TCs have an extended front element that nests into the rear of a select few compatible lenses.
Kenko and Tamron make teleconverters that will fit and do work with the EF 70-300. AF will be unreliable if it works at all, and the viewfinder gets dim which hinders manual focus, but it can be done.


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1/25/2010 2:49:28 PM

 
Rob Warwick
BetterPhoto Member Since: 4/27/2009
robdoc75.com
  Thank you all for your advice. Product descriptions many times don't tell you these things.

Regards,

Rob


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1/25/2010 6:18:48 PM

 
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