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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 05 Dec 2012 (Wednesday) 00:16
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Teleconverter?

 
Photo123abc
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Dec 05, 2012 00:16 |  #1

Hello! I have decided to buy a teleconverter for my Canon EF 70-200mm f/4 USM lens. I have Canon EOS 1100D, but would Sigma teleconverter 1.4X EX DG APO fit to that combination? Will the af work and is there a noticeable diffrence in image quality?

Thank you and sorry my bad english... :D


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1Tanker
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Dec 05, 2012 00:57 |  #2

Hi, welcome to POTN!

Yes, the Sigma will work well with the 70-200/4. I use this combo ( except mine is the IS version), and am very happy with it.

AF works fine.. a touch slower than without, but still very good. IQ is also very good; any TC will cost you some IQ on any lens, but the loss is low with this combo.

Your English is fine. ;)


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wayne.robbins
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Dec 05, 2012 04:54 |  #3

If you have the TC already- great.. If not, I tend to think - use a Canon TC with the Canon- or a third party as a second resort... For a non-sigma lens- if I went third party- I'd be thinking Kenko...

Not knocking it if it works though.. Most of the time though- IQ is derived from both the lens IQ and the TC- both factor in. If you do notice some IQ loss- try stopping down...

Personal experience- the Canon mark III series are very good but very expensive.. The Sigma's with Sigma's- are pretty close...


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phreeky
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Dec 05, 2012 05:02 |  #4

Personally I'd get a Kenko Pro DGX. I would consider the Canon TC for weather-sealed combos and/or the superteles.

I agree, your English is fine. What is your nationality?




  
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rick_reno
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Dec 05, 2012 09:24 |  #5

Your English is fine, better than mine. Yes, that TC will work, Kenko and Canon are very popular TC's here.




  
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gabebalazs
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Dec 05, 2012 11:03 |  #6

Kenko, Canon, Sigma either of these will be fine.

I had the popular Kenko 300 Pro DG and recently and the Sigma 1.4x APO EX DG. To my surprise the Sigma is visibly sharper than the Kenko was, granted I use them on 2 Sigma lenses.


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Mark-B
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Dec 05, 2012 11:07 |  #7

I use the base model Tamron 1.4x TC with my 70-200 f/4. Works great with no problems. Focus speed may be just a touch slower depending on the subject. Image quality is great.


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Mark-B
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Dec 05, 2012 11:10 |  #8

wayne.robbins wrote in post #15328528 (external link)
If you have the TC already- great.. If not, I tend to think - use a Canon TC with the Canon- or a third party as a second resort... For a non-sigma lens- if I went third party- I'd be thinking Kenko...

Third party teleconverters work great. I think the only real advantage of using a Canon teleconverter is that it records the adjusted focal length and aperture into the exif data and the others don't.


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Dec 05, 2012 12:00 |  #9

Mark-B wrote in post #15329492 (external link)
Third party teleconverters work great. I think the only real advantage of using a Canon teleconverter is that it records the adjusted focal length and aperture into the exif data and the others don't.

Really? That must be with Canon lenses only then as my Sig lens/Sig converter/7D combo records all data in the exif. No tele converter it states 200mm at full zoom, TC fitted the exif states 400mm. I'll add that I'm seeing this in Lightroom 4 and I only shoot RAW.

I assume the OP is aware that his f4 lens will become a max aperture of f5.6 with a 1.4 TC added? (add yet another stop for a 2x).

Happy with my setup as an f2.8 400mm lens is a WHOLE bunch more money than a TC.


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LV ­ Moose
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Dec 05, 2012 12:05 as a reply to  @ Spuddyd's post |  #10

I use a Kenko 1.4X TC with my 70-200 f/4L IS. Works fine. It's my understanding that you'll notice some IQ loss with a 2X TC, but not anything noticable with a 1.4X. (or maybe if you're a pixel peeper)


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Kronie
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Dec 05, 2012 12:23 |  #11

I use a Kenko teleplus Pro DGX now but had the Sigma before. The Sigma might have some issues with newer lenses. I know that my Sigma TC didn't AF with my newish Canon 100L but worked perfectly with my 70-200, which was a few years older. I have never had any issues with sigma or kenko tc's not reporting the correct exif data though...




  
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airbutchie
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Dec 05, 2012 12:27 |  #12

<---- TC user here... Kenko Pro DGx 1.4x and 2x models... Happy with both... Minimal IQ loss when stopped down...

:D


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1Tanker
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Dec 05, 2012 12:28 |  #13

Spuddyd wrote in post #15329647 (external link)
Really? That must be with Canon lenses only then as my Sig lens/Sig converter/7D combo records all data in the exif. No tele converter it states 200mm at full zoom, TC fitted the exif states 400mm. I'll add that I'm seeing this in Lightroom 4 and I only shoot RAW.

I assume the OP is aware that his f4 lens will become a max aperture of f5.6 with a 1.4 TC added? (add yet another stop for a 2x).

Happy with my setup as an f2.8 400mm lens is a WHOLE bunch more money than a TC.

Yeah, both of my Sigma's 1.4x and 2x show properly in the EXIF, on my EF70-200/4L and EF300/4L. They don't show on my EF 100/2.8 macro USM, but Canon TC's won't even work on this lens. :)


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Dec 05, 2012 15:11 |  #14

Yep, same here, Kenko Pro 300 1.4 DGX user with a 70-200 f/4 IS lens. Works great.


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Photo123abc
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Dec 06, 2012 23:35 |  #15

Thank you all for your comments. I think I go for sigma's version of the teleconverter. :)

---------

Forgot to ask, that will it also work on largest aperture (5.6 with TC)?


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Teleconverter?
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