So you can go to any telephoto length (28mm-300mm) you want, as long as you are under 27 feet and get a decent shot. Once you cross over 27 ft ... all bets are off at 135mm or higher.
Here is an unaltered 80mm infinity shot (crop):
EXIF: A700 w/ T 28-300 f/3.5-6.3 @ 80mm - f/4.5 - 1/1000 sec - ISO-400 - SPot focus - Spot Metering - S Mode
It was pretty good, overall. I mean, what do you want from a utility lens?
A little post processing to sharpen it a bit ... and here you go!