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Archive 2012 · 7D will focus at F8 with the Tamron-F 1.4X TC
  
 
abqnmusa
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p.1 #1 · 7D will focus at F8 with the Tamron-F 1.4X TC


This TC will autofocus using the 100-400 L on a 7D.
Note: This was at the 400mm setting on the zoom.

I was at the Rio Grande Nature center on saturday. A friend with a 7D used the Tamron-F TC on his 7D with the 100-400L. The autofocus was usable and his images look sharp on the dispaly.

Tamron-F AF 1.4x teleconverter (non-reporting)

http://www.bhphotovideo.com/c/product/53109-REG/Tamron_AF14C700_1_4x_Teleconverter_for_Canon.html



Aug 20, 2012 at 03:40 PM
Ian.Dobinson
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p.1 #2 · 7D will focus at F8 with the Tamron-F 1.4X TC


Yeah any non reporting or a reporting TC with the extra pins taped will work.
I use my 7D with a100-400 and TC sometimes.
However the are issues. I find the middle point does not want to know at all , so if I use zone AF in the centre zone I have to be aware of the missing middle one.

Also it can get a bit hunty at times.



Aug 20, 2012 at 03:46 PM
Imagemaster
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p.1 #3 · 7D will focus at F8 with the Tamron-F 1.4X TC


Ian.Dobinson wrote:
Yeah any non reporting or a reporting TC with the extra pins taped will work.
I use my 7D with a100-400 and TC sometimes.
However the are issues. I find the middle point does not want to know at all , so if I use zone AF in the centre zone I have to be aware of the missing middle one.

Also it can get a bit hunty at times.


+1



Aug 20, 2012 at 08:02 PM
abqnmusa
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p.1 #4 · 7D will focus at F8 with the Tamron-F 1.4X TC


The Tamron-F AF 1.4x teleconverter (non-reporting) does not require any taping of pins.


Sep 19, 2012 at 10:08 PM
RobDickinson
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p.1 #5 · 7D will focus at F8 with the Tamron-F 1.4X TC


The issue is not that it cant do it, it cant do it reliably under enough conditions that canon can sell/enable it as a feature.


Sep 19, 2012 at 10:10 PM
 

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Pixel Perfect
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p.1 #6 · 7D will focus at F8 with the Tamron-F 1.4X TC


What about with the Kenko Pro 300 DGX, which is found to work on 1DX/5D III + 100-400L?


Sep 19, 2012 at 11:00 PM
buggz2k
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p.1 #7 · 7D will focus at F8 with the Tamron-F 1.4X TC


I've used the Kenko taped somewhat successfully with my 40D and 100-400L
As said previously, it can become hunty, and depends what you are trying to do.



Sep 19, 2012 at 11:17 PM
msalvetti
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p.1 #8 · 7D will focus at F8 with the Tamron-F 1.4X TC


I've gotten my 7D/100-400/Tamron combo to AF in One Shot, as long as I don't use the center point. Even in very poor light, I can get focus lock.

I don't think it's a workable combo in AI Servo, even in bright light. It too often ends up hunting, and very slow hunting at that.

Mark



Sep 19, 2012 at 11:25 PM
Andrew J
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p.1 #9 · 7D will focus at F8 with the Tamron-F 1.4X TC


Yes and zone AF outperforms the others.


Sep 19, 2012 at 11:49 PM





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