How long do the normal batteries last?

I use a 2500L for studio portraits and the E10 is on order. Invest in the remote release (the E10 is a huge improvement over the 2500L on that score), the ac adaptor - no need for extra batteries at all and if you wire the computer to the camera you will only need one (fairly large) memory card. The last facility I just mentioned will be an absolute boon in the studio - not so outside. I have an iBook with USB and the way I have had it explained to me is that the camera memory card physically mounts on the desktop of the computer just like another storage device. The thing I hate about compact flash cards is the adaptor that I need to use to download to my iMac and iBook makes things very fiddly but CF cards are much more robust than Smat Media. In a studio with the E10 you would never need to remove the card from the camera! The benefits are huge. Take a shot (or shots) copy them straight onto your hard disk, open them, manipulate them and print them. And take the money! One other thing. I always shoot at the highest resolution with no compression - ie TIFF files. On the E10 they are 12 megabytes each I guarantee that the moment you choose to shoot images at the lower