When I was looking at photo management software, one of the primary features I wanted was that the original image NEVER be modified. From my point of view it is extremely important that no matter what I do, I should always be able to go back to the original jpeg or raw image captured by the camera. probably the best solution is to store the original image, store in a database all the metadata and modification data and an image file made by taking the original and applying all the changes.

   

I use 4 AA NiMH batteries in my camera (a Canon S1). I have some 2500 mAh energizer batteries that I will not use in it and I have some 1800 mAh sanyo ones that I use regularly. Why? because of variances in the batteries and their self discharge rate.

When my wife wants to take a picture of the kids doing something cute we need the either the batteries in the camera to not be discharged, or for there to be a charged set of batteries ready to go.

So I bought a bunch of 2500mAh batteries thinking these would be a good thing. but they didn't seem to last as long when shooting and they were often discharged after sitting for a while. I found out a couple of things, the first is that after using these batteries for a while I would end up with one cell that was discharged more than the others. This was enough for the camera to say that I had low batteries. The other thing was that if I charged up a set of these batteries, a week later the wouldn't have enough charge to run the camera. These batteries had a very high self discharge rate.

So at the end of it, its no good to have high advertised capacity if its not going to be there you

I have had good luck with sanyo batteries. The new sanyo eneloops have a low enough self discharge rate that out of the package they have a usable charge