Why I can't see any photos folder when I connect apple iphone to pc?

I wanna sync photos from iphone to computer but i can't see any folder of photos in the iphone when i connect it to computer, the only thing I see is My Music folder. Can anyone tell me what the problem is?

There are instructions for copying photos off a device to a computer on this page:
http://support.apple.com/.../kb/HT4083
it's done outside of iTunes e.g. By the camera wizard on a Windows pc