Hi all, A year after buying my first camera (D70), I am taking the next baby step. I bought a Nikon SB600 . (It was either the flash or a tripod - and after much debate, I decided to go with the Flash for now). I just returned from the store and am planning to go through the manual to learn the basics. Also, I had previously arranged a practice session at my friends place - I will be taking pictures of her 2 month old at their home tomorrow. I usually take pictures in day light/direct light. I am not yet certain if I will mess around using the SB600 tomorrow - depends on how much I learn today. Meanwhile here are a few questions that I thought I could get your help on. 1. Batteries: The manual for the SB600 provides different options for batteries. One of them is the NiMH 2000 mA. I have a Sanyo eneloop rechargable batteries which have the following spec "AA HR6 1.2V Typ 2000mAh Min 1900mAh". My question is on the specs. The camera store owner specifically asked me to use 2500 mAh batteries. What is the difference between 2500mAh and 2000mAh? Should I go out an buy a 2500mAh rechargable system? If it is not significant, I will live with what I have. Just want to be certain before I start using it. 2. Please share any recommendations that you may have or good tutorials on the webs on learning to use the flash. Thanks in advance. cheers.