Aperture question

Hi all.

Regarding aperture f/4 on eg 70-200 lenses, is the IQ exactly the same on a EF 70-200 f/2.8 @ f/4 as a EF 70-200 f/4 @ f/4 ?

I would die for a comparition

http://www.the-digital-picture.com …omp=0&FLIComp=4​&APIComp=2

One's IS one isn't in the example but you can choose your own...

Click HERE.

Dang, joyork beat me to it =)

Thank You. That was a difference. Did not expect that to be.

Easy answer is no, the results will be slightly different. They've got different optics (it's not just the aperture diaphram that's different). One has 16 elements, the other 18.

All 4 70-200 variants are excellent, and will produce stellar results. If you're concerned with the absolute peak sharpness and contrast, the f/4 IS is the sharpest version, even at f/4 on the f/2.8 versions. However, you'd likely not see it in most shooting.

Which is logical, as it's obviously easier to make an f/4 than an f/2.8 lens. So the one that's limited to f/4 is probably better there than the one that can open up to f/2.8.

are you dead yet...

I own both. The F4L IS is very sharp, one reason I am having a hard time letting go of it. However, the chart shown in the posted link is extremely misleading. The F2.8L IS looks awful compared to the F4L IS and that is just not the case, at least with mine. I will try to find a few minutes today to take a couple of shots with each.

Do I assume that, when you mouse over the image, it changes to the 'compare to' lens? If so, the f/4 is noticeably sharper.

Unless I read it incorrectly, OP was looking for this comparison.

shutterfiend wrote in post #5879322
Unless I read it incorrectly, OP was looking for this comparison.

This link has already been posted twice on this thread! (and it's the one to which I was referring in my last post).

Roy Mathers wrote in post #5879338
This link has already been posted twice on this thread! (and it's the one to which I was referring in my last post).

Actually, all three links are different charts if you look at the lenses. The last link is in the only one with the lenses the OP asked about.

But surely you can pick the lens you want on any of the charts, via the drop down list, which are basically on the same page - or am I missing something?

the f/4 has better IS as far as i know. newer and more advanced.