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| p.2 #16 · Official: Canon EF 200-400mm f/4L IS 1.4X released! |
Here's a quick comparison of dimensions, weight, and price for the EF 200-400/4(5.6) and some likely competitors, sorted in order of weight.
The EF 200-400/4(5.6) has two entries in the table, one without and one with the 1.4x Extender engaged; only the focal length and aperture values are different.
Weight, dimensions, and prices for the Sigma 120-300/2.8 OS include the 1.4x III and 2x III Extenders that are identified in the lens name column. I expect the Sigma with Extenders will have much less nimble AF and slightly degraded IQ in comparsion with the EF 200-400/4(5.6). I owned a Sigma 120-300 OS for a while last year.
I must admit I underpredicted its weight (2.4 kg vs. 3.6 kg) and cost ($9,650 vs. $11,800). Well, you get what you pay for.
weight prediction, http://www.fredmiranda.com/forum/topic/1117852/0#10674646
cost prediction, Lens$db-v24, http://tinyurl.com/jcolwell-lensdb