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Archive 2012 · Anyone use a 5DM3 with at TC to AF at F8?
  
 
dswiger
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p.1 #1 · p.1 #1 · Anyone use a 5DM3 with at TC to AF at F8?


If you followed those acronyms you understand the scenario.
I presently have 5DMkII & 1DsMkII.
I have been hanging on the 1D series because I can use my 400/5/6 with a TC and get good AF, sharp images.

But the temptation to consolidate things has me looking at a 5DMk3 to replace both functionally.
I don't really need to bodies & don't do sports.
I occasionally do wildlife & some events.

I have heard folks talk about taping pins in the past
But I want a current experience with a 5DMk3, with a TC and the AF performance at f8

Too bad Magic Lantern hasn't offered a firmware package to make this a menu selection.
Why Canon limits this even now on the 1DX without at least the option is mystifying.....

Thanks
Dan



Jun 26, 2012 at 05:42 PM
cputeq
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p.1 #2 · p.1 #2 · Anyone use a 5DM3 with at TC to AF at F8?


Yes I think someone, maybe at DPR, had done tests with F8 AF. Try a search there, or even here, or maybe POTN...one of those three



Jun 26, 2012 at 05:49 PM
Ian.Dobinson
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p.1 #3 · p.1 #3 · Anyone use a 5DM3 with at TC to AF at F8?


this has been covered a fair bit in a few threads previous.

general consensus is taped pins works fine



Jun 26, 2012 at 05:58 PM
Scott Stoness
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p.1 #4 · p.1 #4 · Anyone use a 5DM3 with at TC to AF at F8?


[There are some 1.4x's that don't require taping. The downside is that they don't report the correct fstop in the exif.]

But in any event, I have used tamron 1.4x on 100-400L with 5diii (starts at f8 with 1.4x) and it works well. Better than the 7d in similar circumstances which also focuses with the same 1.4x on it.



Jun 26, 2012 at 06:55 PM
dswiger
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p.1 #5 · p.1 #5 · Anyone use a 5DM3 with at TC to AF at F8?


Scott,
Thanks for the info. I have Kenko ProTCs that I have been very satisfied with results.
Hoping to try them on a friends 5DMkIII soon.
So guess my next question for folks might be if the Kenko needs pins taped....

Ian,
I tried some searches, but the acroym was successful
Thanks
Dan



Jun 26, 2012 at 08:38 PM
Scott Stoness
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p.1 #6 · p.1 #6 · Anyone use a 5DM3 with at TC to AF at F8?


My understanding is that the kenko "pros" require taping. But the non "pros" don't.

If they report the fstop correctly they need taping.

I have tried my tamron 1.4 with canon 1.4xii on my 500f4 and it focuses fine. I am not vouching for quality. Here is a quick shot in low light. Uncropped and focussed on the middle flower. Focus happend fast despite the gloomy sky at 9PM. Unfortunately at this hour it was iso 6400 and 1/320s.




1.4x Tamron x 1.4x Canon III & 5d3 centre focussed

  Canon EOS 5D Mark III    EF500mm f/4L IS USM +1.4x lens    700mm    f/5.6    1/320s    6400 ISO    +0.3 EV  




Jun 27, 2012 at 03:01 AM
kevindar
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p.1 #7 · p.1 #7 · Anyone use a 5DM3 with at TC to AF at F8?


I have a post here on a sequence
http://www.fredmiranda.com/forum/topic/1101573/1
and another thread and sequence
http://photography-on-the.net/forum/showthread.php?t=1170611



Jun 27, 2012 at 06:17 AM
 

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Breitling65
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p.1 #8 · p.1 #8 · Anyone use a 5DM3 with at TC to AF at F8?


I taped my Canon 1.4III, attached to 100-400L and it does AF on 5d3. Performance is crappy, you need to press focus button couple of times until it will finally focus. I will probably crop my shots with better results.


Jun 27, 2012 at 10:17 AM
Ron Hew
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p.1 #9 · p.1 #9 · Anyone use a 5DM3 with at TC to AF at F8?


LV can focus at F8.0 without taping the pin but it is slow to accquire lock. I tested it on 400 F5.6L+1.4 III. YMMV


Jun 27, 2012 at 05:45 PM
scalesusa
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p.1 #10 · p.1 #10 · Anyone use a 5DM3 with at TC to AF at F8?


I tried taping the pins on mine, and it was hit and miss, mostly miss. It was a waste of time. Iy might AF fine on some lenses in very good light, but at best it will be slow, and will likely hunt a lot. I also found that it did not focus accurately with some lenses.


Jun 28, 2012 at 02:34 AM
AGeoJO
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p.1 #11 · p.1 #11 · Anyone use a 5DM3 with at TC to AF at F8?


scalesusa wrote:
I tried taping the pins on mine, and it was hit and miss, mostly miss. It was a waste of time. Iy might AF fine on some lenses in very good light, but at best it will be slow, and will likely hunt a lot. I also found that it did not focus accurately with some lenses.



Is this your own experience on a 5D Mark III? Or on a different camera, like the 5D Mark II?



Jun 28, 2012 at 02:41 AM
Imagemaster
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p.1 #12 · p.1 #12 · Anyone use a 5DM3 with at TC to AF at F8?


AGeoJO wrote:
Is this your own experience on a 5D Mark III? Or on a different camera, like the 5D Mark II?


ditto



Jun 28, 2012 at 04:05 AM
abqnmusa
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p.1 #13 · p.1 #13 · Anyone use a 5DM3 with at TC to AF at F8?


I found a 1.4X non-reporting TC's that auto-focus with 5D III nicely at F8 (no taping of pins)
works for BIF as focus is very usable.

Tamron-F AF 1.4x teleconverter (non-reporting)
http://www.bhphotovideo.com/c/product/53109-REG/Tamron_AF14C700_1_4x_Teleconverter_for_Canon.html










Tamron 1.4X TC







5D III / Canon 400mm F5.6 / Tamron 1.4X TC

  Canon EOS 5D Mark III    EF400mm f/5.6L USM lens    560mm    f/8.0    1/2000s    640 ISO    0.0 EV  







5D III / Canon 400mm F5.6 / Tamron 1.4X TC

  Canon EOS 5D Mark III    EF400mm f/5.6L USM lens    560mm    f/9.0    1/2500s    800 ISO    0.0 EV  



Edited on Jan 18, 2013 at 07:16 PM · View previous versions



Aug 15, 2012 at 08:03 PM
Don Clary
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p.1 #14 · p.1 #14 · Anyone use a 5DM3 with at TC to AF at F8?


dswiger: Why Canon limits this even now on the 1DX without at least the option is mystifying.....

No mystery at all; a Canon decision to widen the spacing of the AF sensors in the viewfinder, which helps a large number of users, while hurting a specialized few:

http://www.arihazeghiphotography.com/AH_CW_interview/

"The 61-point AF system not only has 16 more AF points than any of the 45-point systems, it is also 20% wider in coverage (19mm vs. 15mm), making it easier for photographers to keep their subjects within the active AF area.

AH: We understand due to the large number of cross-type and double-precision cross-type sensors there was not enough room to fit the f/8 line sensor in the new AF sensor. However for wildlife applications the 2X Tele-extender in combination with f/4 super-telephoto lenses offers great flexibility. Is it possible for Canon to address this issue?

CW: This request has been conveyed for consideration."




Aug 15, 2012 at 09:00 PM





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