What kind of shooting are you doing that would require larger battery capacity? If you are constantly shooting high output flash shots for hours a day (like with a SB800), then perhaps another camera body would be more appropriate for your work. The standard battery life of the D70 is exceptional. However, your shooting requirements may be much more demanding than mine. I do keep a fully charged spare....just in case.
I used to work in a camera store and I called past the other day and ran into one of my accessory reps! He actually showed me a 3rd party battery grip for the D70! So, there are non genuine ones available! Buggered if I can remember the brand though!
If I remember correctly, the upper level D100 offers it, but I think since D50/70 are suppose to be entry level dSLR's they don't offer them to differentiate them from the D100. I think it's Nikons marketing strategy.
Harbor electronics and Hoodsman make third market grips but they require wires and use the IR sensor or the remote shutter release plug. Hence, no half sutter press to focus and recompose your shots.
If I remember correctly, the upper level D100 offers it, but I think since D50/70 are suppose to be entry level dSLR's they don't offer them to differentiate them from the D100. I think it's Nikons marketing strategy.
Harbor electronics and Hoodsman make third market grips but they require wires and use the IR sensor or the remote shutter release plug. Hence, no half sutter press to focus and recompose your shots.
Just a correction on the manufacture. It's "Harbortronics" :)
I agree with the man who asked what you would need the extra battery power for. One battery in and another for standby is more than enough unless you are using the flash on the camera body quite a bit....other than that I think I would consider the extra weight redundant