hi dheath,
i am no camera expert, but the answer to your question about how many pictures can a card hold is it depends on the quality of photos that you will take.
i copied this from the specs of a digital camera.
? 3072 x 2048 JPEG Fine: 3.1 MB
? 3072 x 2048 JPEG Normal: 1.8 MB
? 2048 x 1360 JPEG Fine: 1.8 MB
? 2048 x 1360 JPEG Normal: 1.2 MB
? 1536 x 1024 JPEG Fine: 1.4 MB
? 1536 x 1024 JPEG Normal: 0.9 MB
? 3072 x 2048 RAW: 6.0 MB
I take all photos in ''fine'' mode, which is the highest resolution, so I use a lot of space per picture. Most of my photos are around 1.8 mb each.
To be honest, I've never counted how many fit on a card. I bought 2 512 mb cards from ecost.com, because after rebates a while ago (december or november), they were $20 each.
I know that on xmas eve and xmas day I took over 175 pictures and they all fit on one 512 mb card.
If you also play to take video clips, a 256 mb card probably won't last you very long. That's why I bought 2 cards (smile).
Yes, you can delete the pictures once you have copied them to your computer or some other device. I keep mine on an external hard drive because I have a laptop and only have a 60 gb hard drive.
I hope this helps.
I hope you enjoy your elura 70. About a month ago, I purchased the optura 60. I put the sd card in, but have yet to take any pictures - LOL, only video.
Indera