Is there any point?

[highlandpiper]

I have the 100-400 IS and take a lot of bird shots. I like the 100-400 for the IS especially and would NOT get rid of it. Is there any point in ALSO owning the 400 5.6 I understand it the THE bird in flight lens to have. I have some luck with the 100-400 for BIF but am wondering if I should consider the 400.

Thanks for your input.

[angryhampster]

It's one of the quickest-focusing, most accurate-focusing lenses canon makes. Color rendition and resolution are superb, and it's not incredibly heavy.

[august23]

Sounds like a good reason to get it. :p

[tekkie]

the 400 is supposed to af slightly faster and the optics are probably slightly better to use with a TC

I think I will go with the 70-200 2.8 before the 400 if you already have the 100-400, thats the only thing I dont like is the fact that its 5.6

[Double Negative]

The prime will trump the zoom on AF speed and IQ. It's also lighter in weight. However it does lack IS.

[gasrocks]

Will you ever want longer than your 100-400? IF yes, save the $ you would have spent on the 400/5.6 and start saving for longer.