So today I had a gig, where I had to shoot from across a soccer field. I used my Bigma with a 1.4x tele and manual focused the shot. I have a 120-300 f/2.8 and a 2x converter on order, but even with that setup I only get a 600mm f/5.6. I'm now lusting for even more reach. What are some cheap alternatives on the Nikon end of things? I'm lusting big glass now, I want the reach!