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Nikon SB-600
A review of this flash by Ken Rockwell
How to use this flash as a remote slave
This seems like a good flash for my purposes. It is far more powerful than the built in flash. Using it with my macro lens, I don't see a shadow as I would with the built in flash. When paired with a camera capable of "Commander Mode", like my D70 it can be controlled off camera by using the built in flash. This can be fun if you want to get the light coming from a different angle. This feature can also be useful for macro photography.
