Lee Jay said:Khalai said:Lee Jay said:rrcphoto said:you're really not comparing this to the 200-400/4 are you?![]()
Why not? It's only one stop of difference. The 100-400 has the 100-200 range while the 200-400 has the built-in TC. I'd bet the optics are similar and that it would be really hard to tell the difference between them at the same focal length.
I'd say "it's a WHOLE stop of difference". Night and day in those focal lengths. Compare 300/2.8 and 300/4 or 200/2 and 200/2.8 - there is also "only" one stop difference, yet there is quite surprising PRICE difference![]()
Yes, and that's one reason I find Canon superteles so hugely overpriced.
Compare a 70-200/4L IS and a 70-200/2.8L IS and you'll see a difference that I think is much more justified than the difference between a 300/4L IS and a 300/2.8L IS or a 100-400L IS and a 200-400/4L IS.
Of course what seems good value is subjective, but you mustn't forget the superteles have better ruggedness and weather sealing, better IS, better AF speed and accuracy, and are sharper wide open than their little siblings. It's not just about the aperture.
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