The 560/4 is not noted for its light weight ;-) 560/5.6 is a bit better... john -----Original Message----- Hello Doug, While not quite as good discerning color as you I was only a point or so below you. The Canon 500 is probably your best bet unless you spend into the Leica APO modular lenses which cost as much as your truck. -- Don don.dory at gmail.com