I've owned a couple of the very first 80-200 AF one-touch models--the pre-D model,both of them. The AF isn't super-fast on consumer bodies, but is faster on the D1 and D2 series bodies with their higher-torque motors. There was a D-capable one with one ring for zoom and focus as well, made beginning in 1992 I think.
This lens design is not quite as good as more recent lenses; the design is approaching 20 years old now, and there is some CA at the longer end of the focusing range, mostly noted when strong backlight meets silhouetted objects (tree branches, telephone wires) or really strong backlight,like outdoor lighting with an indoors person in front of it.
This lens has a couple things as pluses--it weighs almost a full POUND LESS than an 80-200 AF-S model...and it has no tripod ring on it...it was designed as a HAND-held telephoto zoom. Tripod mounts of the "sled" style are available from RRS and Kirk Enterprises. It has the fewest elements of any 80-200 or 70-200, plus ED glass, and it is pretty darned good when shooting right toward bright light sources; check the Pelican sign in this gallery. These images are going on eight years old now,and are pretty minimally processed.
80-200 AF-ED One-Touch samples Photo Gallery by Derrel at pbase.com
The one ring makes it a very fast,handy lens for manually focusing and zooming, but you must flip the AF/M switch to shift modes. For $400, it gives a lot of positives. I'm serious about the 15 and 3/4 ounce weight difference between this and the last 80-200 AF-S model. Consider that an 85mm f/1.8 AF-D is around four bills now--this has 80,105,135,150,200,all in one tube.
