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Cameras, Lenses and Accessories: Discuss Sigma AF EX 2.0x APO converter Canon Fit...Can anyone tell me please if this, would be compatable with my 350D & Canon EF 70-300 F4/5.6 IS USM ...
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Old 28-03-2008, 23:37   #1 (permalink)
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Sigma AF EX 2.0x APO converter Canon Fit

Can anyone tell me please if this, would be compatable with my 350D & Canon EF 70-300 F4/5.6 IS USM here is the item thank you ...Ray

Sigma 2X EX DG APO TeleConverter AF for Canon EOS Cameras
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Old 29-03-2008, 02:39   #2 (permalink)
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Re: Sigma AF EX 2.0x APO converter Canon Fit

It's compatable yes, but you'll loose autofocus.
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Old 29-03-2008, 08:21   #3 (permalink)
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Re: Sigma AF EX 2.0x APO converter Canon Fit

You would be far better with the Kenko 1.4x pro DG teleconvertor. Its excellent quality and would allow you to retain autofocus. I used it on my 70-200L to get the first three shots in this thread. Obviously only you would be able to decide if the extra range of the 1.4x is enough for your shooting.
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Old 29-03-2008, 08:57   #4 (permalink)
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Re: Sigma AF EX 2.0x APO converter Canon Fit

Thank you the kenco does look better for me im sure it will fit my needs, and it will go in my bag better than the sigma...Ray
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Old 29-03-2008, 16:47   #5 (permalink)
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Re: Sigma AF EX 2.0x APO converter Canon Fit

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Originally Posted by Steve View Post
You would be far better with the Kenko 1.4x pro DG teleconvertor. Its excellent quality and would allow you to retain autofocus.
I don't think Ray would be able to retain autofocus with the lens he intends to use it with, even by just loosing 1-stop with a 1.4x t-con... can anyone confirm this please?
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Old 29-03-2008, 19:14   #6 (permalink)
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Re: Sigma AF EX 2.0x APO converter Canon Fit

If he uses it at f5.6 or below the autofocus will still function. If he tapes the contacts on the converter he will still retain AF at above f5.6 but its effectiveness will be subject to the light conditions at the time of shooting.
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Old 29-03-2008, 19:32   #7 (permalink)
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Re: Sigma AF EX 2.0x APO converter Canon Fit

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Originally Posted by Steve View Post
If he uses it at f5.6 or below the autofocus will still function. If he tapes the contacts on the converter he will still retain AF at above f5.6 but its effectiveness will be subject to the light conditions at the time of shooting.
Ah right thanks thats good to know
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Old 31-03-2008, 15:12   #8 (permalink)
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Re: Sigma AF EX 2.0x APO converter Canon Fit

Quote:
Originally Posted by Steve View Post
You would be far better with the Kenko 1.4x pro DG teleconvertor. Its excellent quality and would allow you to retain autofocus. I used it on my 70-200L to get the first three shots in this thread. Obviously only you would be able to decide if the extra range of the 1.4x is enough for your shooting.
Is there a big difference between the Kenco PRO and this one please thanks ...Ray

KENKO TELECONVERTOR 1.4X CANON FIT on eBay, also To Fit Canon, For 35mm SLR, Camera Lenses, Photography (end time 06-Apr-08 13:36:08 BST)
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Old 31-03-2008, 15:26   #9 (permalink)
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Re: Sigma AF EX 2.0x APO converter Canon Fit

I believe that the Pro version has more elements and better performance especially at the edges. I'd go for the PRO 300 DG as Steve suggested earlier. I have the earlier version of the 1.4x (without the 'DG') and that works on the 70-300 IS although it means that the max aperture at 300mm is f/8 and autofocus can be a bit hit-and-miss unless light levels are fairly good.
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Old 31-03-2008, 15:38   #10 (permalink)
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Re: Sigma AF EX 2.0x APO converter Canon Fit

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Originally Posted by silkstone View Post
I believe that the Pro version has more elements and better performance especially at the edges. I'd go for the PRO 300 DG as Steve suggested earlier. I have the earlier version of the 1.4x (without the 'DG') and that works on the 70-300 IS although it means that the max aperture at 300mm is f/8 and autofocus can be a bit hit-and-miss unless light levels are fairly good.
Great thanks for that i will get the PRO
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