It may be a matter of confusion ... as that lens would not autofocus on the D40, D40x and D60, but should do well on the D80.
Just to be sure, it is this lens :shrug:
http://www.amazon.co.uk/Tamron-SP-9...3?ie=UTF8&s=electronics&qid=1222329182&sr=8-3
If so, then it sure will autofocus on your D80 unless there is something wrong with the lens itself.
On the matter of "does it matter" .. frankly, no it doesn't.
For any good macro / close-up work, you will need to use manual focus to get things spot on.
Glad that it came in such good condition.
I am not aware of the settings on the D80, may be someone with experience on that front can give you some feedback on the manual setting. Question, when you put the camera in to manual mode, are you able to change the setting (apperture and shutter speed), and does the lens work well that way?
adaptall mount was used in the 80s and early 90s so i'd say it's quite a bit older than 5 years, as stated have a good look through it before you store it with any of your other kit as fungus spreadsEdit : I,ve also discovered it uses the "Adaptall II interchangeable mount system", which may explain its lack of features.
Texy