Doug Brown
Lifetime Member
I photographed this Cassin's Finch in the Sandia Mountains last year. There is a water source up there at about 9,000 feet that all sorts of birds tend to flock to. The 500 with a doubler can give you excellent results.
Canon 1D Mark III, 1000mm, f/8, 1/1250, ISO 800, -1/3 EV, fill flash, monopod
Canon 1D Mark III, 1000mm, f/8, 1/1250, ISO 800, -1/3 EV, fill flash, monopod