Photos on iPhone taking up a lot of space?

I recently purchased an iPhone 5 and have taken a total of 22 photos. The problem is this takes up 2.1GB of memory. Is that normal? Is there a way in which the memory usage for photos can be decreased?

The only way to do that is if you buy more memory for your iPhone 5. Otherwise no unless you want delete some pictures.

You might have shoot a long video which is taking up the space. Photos don't take so much space.

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