The thumbnail attracted me to this one in particular. The background is great, the setting is great and it has very good sharpness.
One suggestion would be a slight crop of the background to the right, just enough to get his head a little further away from horz center and put him closer to the sweet spot.
Although it contributed to this wonderful background, and I know it can be tough with macros, but a little more DOF next time or putting the hyperfocal point so his eye is in focus would have made this a killer shot. |