Canon 2X ext. on EF100-400

Splog

Splog

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Steve
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Has anyone any opinions / experience as to the image quality using the above combination? Would also be interested in knowing how the 1.4 compares :thinking:

Thanks
 
Mmmm...a bit dodgy I think, never worked for me. Try the 7D and up the iso to get a decent shutter/aperture combo, and crop!!
 
If you have good (very good) light, then you should get reasonable results if you could step the lens down a few extra f-stops, but manual focus only on all canon bodies as combo is f11
 
Thanks again for the help :thumbs:
 
I've used the 1.4X on a 1D MKIII so AF was maintained. Results were really very good at 400mm wide open but not everyone gets that result.
 
You'll lose AF with any extender/TC. Even if you tape the pins and fool the AF into attempting focus it's pretty useless frankly, and live view focus isn't much help for the kind of things you tend to shoot with a lens like that, eg action of some sort.

Image quality can be okay-ish, if you're stuck, but with a 50D you've got enough resolution to simply crop the image and get much the same result, while retaining good AF performance. Also not ideal, but maybe workable.

When you get to 400mm, you hit a brick wall in practical terms. Everything stacks up against you. The answer is big primes and big money.
 
HoppyUK said:
You'll lose AF with any extender/TC. Even if you tape the pins and fool the AF into attempting focus it's pretty useless frankly, and live view focus isn't much help for the kind of things you tend to shoot with a lens like that, eg action of some sort.

Image quality can be okay-ish, if you're stuck, but with a 50D you've got enough resolution to simply crop the image and get much the same result, while retaining good AF performance. Also not ideal, but maybe workable.

When you get to 400mm, you hit a brick wall in practical terms. Everything stacks up against you. The answer is big primes and big money.
Click to expand...
 
HoppyUK said:
You'll lose AF with any extender/TC. Even if you tape the pins and fool the AF into attempting focus it's pretty useless frankly, and live view focus isn't much help for the kind of things you tend to shoot with a lens like that, eg action of some sort.

Image quality can be okay-ish, if you're stuck, but with a 50D you've got enough resolution to simply crop the image and get much the same result, while retaining good AF performance. Also not ideal, but maybe workable.

When you get to 400mm, you hit a brick wall in practical terms. Everything stacks up against you. The answer is big primes and big money.
Click to expand...

Cheers Richard :thumbs:

I think I'll hire the TC and decide :thinking:
 
Splog said:
Cheers Richard :thumbs:

I think I'll hire the TC and decide :thinking:
Click to expand...

Good plan :thumbs: Give StewartR a call.

If you're up for a dare, I dare you to hire an Extender for your 100-400L, and compare it side by side with a 500L f/4 prime.

The 500/4 will just blow you away first of all with a wonderful viewfinder image, then crisp and instant AF, IS of course, and then last but not least, images with so much pop and sparkle they'll knock your eye out.

I haven't got a big fast prime. I try to stay away from them. Evil things ;) :D
 
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