At about US$10,900, you’ll be looking to solve a serious photographic challenge of some kind.
Caveat: I am not a long lens shooter. This review captures (mainly) my observations on approaching and using a huge super telephoto for the first time. The previous largest lens I had used (and owned) was the Nikon 200-400mm f/4, which feels only medium size by comparison. The 800/5.6L IS is substantially larger.
With two fluorite lens elements, one UD element and one Super-UD element, control of color fringing is outstanding— I observed no evidence of any.
The 800/5.6L is also weather resistant and light weight (relatively speaking). With the lens hood, I weighed it 10.5 pounds, a bit higher than the nominal 9.9 weight of the lens alone.
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