doccash,
I know what you mean about the difference in price from the F2.8 to the F5.6. About 95% of the time the F5.6 will work just fine, and the difference in price for the other 5% is not worth it. Now if you were making a living taking pictures and you shot a lot of low light subjects then it would be worth it maybe. Looking at the shot that you made, the optics are just as good as the F2.8, maybe a little better. The difference in price is just for the speed. Again, great shot!!!!!