Well, if each photo is around 2.5 MB you can hold 550 photos, you can always buy a couple extra 2 gigabyte memory cards, thier priced very inexpensivly
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It is recommended with a camera that is this sharp you have a minimum of a 1 gigabyte memory card. On this card you can fit approximately 56 pictures depending on the lighting and subject involved.
The data transfer rate of a Sandisk Compact Flash 8 GB memory card is 10/MB per second minimum. This memory card is geared towards serious photographers that take many pictures quickly.
The content of the picture and the "Quality" level you are using affects how many pictures a memory card will hold. A 1 GB card in a 6 MP camera will hold something like 450 pictures on medium quality and 225 pictures on high quality.
A camera with this pixel setting will have more room, but the images may not be as crisp as ones with a bigger pixel count. You can fit approximately 200 pictures of this kind on a 2 GB memory card.
The content of the picture and what "Quality" level you are using affects how many pictures a memory card will hold. A 2 GB card in a 7.2 MP camera will hold something like 800 pictures on medium quality and 400 pictures on high quality.
16,000
With an 8 gb card you generally can take around 2200 pictures depending on the quality of the pictures. Higher quality means bigger files and less pictures. Lower quality means smaller files and more pictures.
none, memory sticks don't produce images, cameras do.
There is no way to tell because you have not given any details about the camera. 8.1MP has nothing to do with how many pictures the camera can save, it all depends on the memory type and how much memory you have for the camera. It also depends on how you store - high or low res JPEGs, or RAW etc. The storage is in the memory device, SD card, CF card, Memory Stick etc, so its capacity, typically 1 or 2 gigabytes or more, has to be counted. In a 1 gigabyte card you could store from less than 100 to several thousand pics.
i think its about 4000
A lot ! As an example - My Fujifilm Finepix S2750 cam - at 12 Megapixels, will take 680 shots at max resolution to fill a 2GB card !