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Old Nov 19, 2007, 2:16 PM   #1
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Hi,

I got a chance to use this lens for a couple of weeks. Wanted to know if the Sigma 2X will work on this lens and difference in image quality when using the sigma tele and the canon tele on this lens

any information would be great.

@NHL

today i got a chance to hold the 500 F4- i should say without the hood, its not as threatening as it sounds. But once the hood is fitter this feels like a bazooka. And the weight is somewhat hand holdable. Was able to take some hand held pictures, but the weight is something that will haunt the shoulder and back if prolonged hand holding. I was just taken back by the sheer size of that front element. I was taken aback by the 120-300 when i first saw it. But this one is a monstor.

Wish i can buy that one....love at first sight
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Old Nov 19, 2007, 10:20 PM   #2
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I use the Sigma 2xTC on the 500mm f/4L and it still focus @ f/8 on the 1D MrkII so it should do OK on the 300 f/2.8L as well. I don't have a Canon 2x to compare too, but definetly not as good as the 1.4x for example...

Yeah - The 500mm f/4 is the limit for me - anything heavier then you have to change your shooting style and be less mobile with a tripod/gymbal!
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Old Nov 20, 2007, 3:26 PM   #3
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i have the sigma 2x and the 1.4x which worked really well with the sigma 120-300.

I hope it works the same way...and as u said, 500f4 is just the borderline of handholding.

If one is comforable with the 120-300 i think 500 could be a stretch. this lens keeps growing on me.....atleast with the 300 2.8 i am sure i can carry it with my carry on...ot the 500 though
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Old Nov 21, 2007, 5:44 AM   #4
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The Canon 2x TC is where the problem is - It won't work on the Sigma lenses because it's slighly longer inside.
Actually the Canon 2x works on a very limited set of lenses even in the Canon line...
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