... Had the Canon 500mm f 4.0 super telephoto and was very satisfied with the superb quality but found I needed more reach without using the 1.4x and 2x teleconverters. Having to change converters in the field, with weather and huimidity being what it is here in south Florida, concerned me.
With the bare lens I can achieve the same result as I did without fumbling to attach the converters on the fly.
Just a note: Some may disagree, but I saw now discernable I.Q. degradation from the 1.4x converter when attached to the 500mm.
I use the 800mm with a Canon 50D and Canon 5d MarkII with wonderful results.
The drop-in 52mm circular polarizing filter[accessory] gives gorgeous color contrast and saturation during cloudless sunny daytime use.
Super fast auto-focus with two IS settings that help keep this large lens functioning in windy conditions.
Another note: This lens will auto-focus fast with the aforementioned camera bodies but will not auto-focus if a 1.4x converter is attached, although the IS will function. You would need to use a 1D or 1Ds series body to have auto-focus function with the 1.4x converter and then it would only utilize the center focus point. Auto-focus will not work with "any" camera body with the 2x converter attached to this lens....
Have taken some great wildlife shots down here in the Everglades and Florida Keys and hope to get to use this amazing lens in other locales soon ...
Check Amazon Price and Read More Reviews on Canon EF 800mm f/5.6L IS USM Super Telephoto Lens for Canon Digital SLR Cameras
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