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FORUMS Photography Talk by Genre Bird Talk 
Thread started 25 Jan 2010 (Monday) 19:48
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7D - 100-400 + 1.4x Extender?

 
pleb1024
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Jan 25, 2010 19:48 |  #1

How does the 7D - 100-400L and a 1.4x extender fair, and does the 7D retain autofocus -either via taping pins, or a non reporting extender???

I'm looking to see if its going to be worth sinking the $$ into a either a canon or knock-off.

Thanks
Daniel


7DMkII | 7D | 450D | Canon 18-55 IS | Canon 55-250 | Canon 100-400L MkII | Canon 100-400L | Canon 24-105L | Canon 50mm 1.8 | Canon 1.4x TC II | Tokina 11-16
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Larry ­ Weinman
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Jan 26, 2010 15:45 |  #2

It doesn't work well. The auto focus will hunt and hunt some more and some of the time when you get the cameras in focus beep you will find that it really wasn't in focus after all. I tried this with taped pins and also with a non reporting teleconverter.


7D Mark II 6D 100mm f 2.8 macro 180mm f 3.5 macro, MP-E-65 300mm f 2.8 500mm f4 Tokina 10-17mm fisheye 10-22mm 17-55mm 24-105mm 70-300mm 70-200 f 2.8 Mk II 100-400mm Mk II 1.4 TCIII 2X TCIII 580EX II 430 EX II MT 24 EX Sigma 150-600

  
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pleb1024
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Jan 26, 2010 16:47 |  #3

Larry Weinman wrote in post #9476511 (external link)
It doesn't work well. The auto focus will hunt and hunt some more and some of the time when you get the cameras in focus beep you will find that it really wasn't in focus after all. I tried this with taped pins and also with a non reporting teleconverter.

Thanks. Guess I will put the money to yet another lens then.

Much Appreciated.

Daniel


7DMkII | 7D | 450D | Canon 18-55 IS | Canon 55-250 | Canon 100-400L MkII | Canon 100-400L | Canon 24-105L | Canon 50mm 1.8 | Canon 1.4x TC II | Tokina 11-16
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7D - 100-400 + 1.4x Extender?
FORUMS Photography Talk by Genre Bird Talk 
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