9.0
10
9.3

Canon New FD 600mm f/4.5

Year 1981
Lens Groups 5
Lens Element 6
Aperature Blades 9
Minimum Aperture f/32
Closest Focusing 8. m
Max. Magnifcation 1:12.7 (0.079x)
Filter Size 48 mm
Diameter x Length 155 x 462 mm
Weight 3750 gr (8.27 lb)
Hood -
2011-04-04

Ontarian

IQ
9.0
Build
10.0
9.3
Focuses twice as close as the 800 and notably brighter
Much worse chromatic aberration (purple fringing) than the 800

I sold a 600 and 800 copy to a film production company. A year later they are selling one of them and they chose to keep the 600. I personally kept an 800 copy myself for the absolute best in far detail resolving power. That said I find when shooting little critters in my backyard they often venture closer to me than I can focus and I miss the 600. More info on these two lenses can be found in this set on my flickr photostream: http://www.flickr.com/photos/ontarian/sets/72157623884845990/