Canon EF 800mm f/5.6L IS Super Telephoto
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.
|Focal Length and maximum aperture||800 mm f/5.6|
|Lens Construction||18 elements in 14 groups|
|Angle of View diagonal||3° 5' on full-frame|
|Focus Adjustment||Ring type ultrasonic motor with internal focus|
|Closest Focusing Distance||19.7 ft / 6m|
|Filter size||52mm (Drop-in Gelatin Filter Holder)|
|Max Diameter and Length||6.4 in. x 18.1 in./ 162mm x 461mm|
Working weight with lens hood
With hood, rear cap, soft case
|9.9 pounds / 4500g
(10.5 pounds with lens hood)
The full review goes into alternatives, but this is the tripod head you’ll want.
This MTF chart shows outstanding contrast. While there is some astigmatism present, the overall MTF is so high that very crisp detail should result at every setting.
There is no sharpness advantage to stopping down— at all. Stop down only to improve depth of field. Stopping down past f/8 will only drop the contrast resulting in less crisp images (except for depth of field), due to diffraction.
An in-depth review of this lens is available in DAP.
At about $10,900, the Canon 800mm f/5.6L IS delivers the results serious pros need, with some attention given to focus, shutter speed, tripod stability, technique, etc.