ChrisM:
Lenses - Da bomb lens is the 12-24, then the 10.5 (both beaucoup $$$). For Macro you want the 105, although it will be difficult to shoot with. mid range is the 60. That setup gives you all options
Check out the forums at digitaldiver.net. Lots of D70 info there.
Chris
Chris is right on here - even though the heretic followed up his magnificent decision to shoot Olympus for years with an unfortunate decision to go to Canon - the advice above is sound.
You'll likely be using your camera on the surface much more that you use it below. I did when I was shooting Oly, and I will with my D70 (at about 1300 images and counting after about 3 weeks.)
I got the kit and the 12-24 W/A. I'm constantly shooing indoors - family stuff, bunny stuff (don't ask) and all manner of corporate events, etc. So the W/A was a no brainer first lens.
I've rented the 105. I've rented the 60. I liked the 60 better, honestly. The 105 was just too tough to shoot. I'll probably rent it again for a few days to give it another try, but the 60 worked great for me.
Next up for me is either the 80 - 400 VR (rented it over Tgiving week - loved it) or the 80 - 200 2.8.... dunno.
I spent my Bday weekend a couple of weeks ago in Monterey - so I spent an inordinate amount of time at Backscatter photo drooling over their D70 housings and ports. Maybe one day I'll start shooting wet again. For now, I'm dryboy.
The 12-24 would be my recommendation as your next lens. It really does rule. I've seen amazing UW shots with it, there are ports available for most housings for this lens, and you'll use it all the time on land. Its on my cam much more than the kit lens is.
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Ken