Yah, agree with all of the above LOL...
Shooting with an Oly 4040, limited to 128mb in Hi-quality averaged 46 shots per card.
Battery (1600mh now 2300mh) would give out in 2nd dive so just got in the habit of swapping out card and battery after EACH dive. Can be a problem on a day boat, but got the routine done as doable. (battery will probably last longer, just not worth the chance)
Just got the D200, plan on shooting RAW + jpg and have several 2gig cards. That and with the newer batteries Li-ion I'm thinking I might be able to last 3 dives a day without going into the housing (way bigger and bulkier etc) and for me that would be ideal.
When done for the day, get back and either download (have the old wallet - and found a guy that repairs them eh??) or swap a new card in for the day. Prefer doing both for backups, but will take a while to build up the card numbers to do that.
As stated so many times, it bears repeating, as I've had it happen to me several times.
- I Don't want the largest card as that will tempt me to keep all photos on one card. If the card goes Ka-putt... lost all.
- I don't want the smallest cards as I don't want to swap out (assuming batter will last all day 3-dives) after each dive for the reasons stated above.
- Leave it alone, until you get home...
All that to say, I believe there's a "Sweet Spot" in there somewhere. Thinking the 2gig card would be the ticket, but maybe the 1 gig would do it to. Probably not much less than that... don't know what a raw + jpg pic size would be. when I Photo shop my current Hi-quality from my Oly 4040 they average around 9-11mb in .psd format...
So doing the math will help.. Anyway, the point I'm trying to make is that they is a "Sweet Spot" for me. 1 day = 1 setup and then leave it alone.
Hope that helps...
Now, off to the zoo to play with the new D200.. heheh..have plenty of time till I can get the housing eh???
Hope that helps..
ps. You might look around for a Memory card recovery program too... they're great. When a full card comes back, unreadable, just run the software and you just "MIGHT??" be able to recover them, except the 1 or 2 photos that corrupted the card for whatever reason. I've saved several full cards that way.
Looks like a 4gig card is the ticket. 40+pics per gig (RAW + jpg Fine) Should cover 3 dives comfortably