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How many pictures can you take with a Memory Stick PRO Duo 512 MB?

with a 7.2 megapixel and how many pictures can you take with 1 gb memory stick pro duo? i'm planning to buy a camera and i need to knwo approximately how many pictures can i take... i think i might buy
Sony Cybershot DSCS650 7.2MP Digital Still


around 150 pictures
there is a chart in the manual

Sony Ericsson W810i Unlocked Cell Phone with 2 MP Camera- MP3/Video Player- Memory Stick Duo--Inter

www.amazon.com W810 WalkmanВ® is a stylish music player with everything you need for a mobile music lifestyle. An easy-to-use WalkmanВ® digital ...