Quality of iPhone camera improves from generation to generation. The photo collage shows how much the iPhone camera has improved since 2007. The iPhone 4S is dramatically clearer and sharper than previous iPhone versions. Using separate focus and exposure in Camera+ on the iPhone 4 & 4S significantly helped create a more balanced exposure. The device steadily improved from 3-megapixels, to 5-megapixels, with the iPhone 4S serving up an 8-megapixel sensor and dramatically improved lens technology. To see the comparison in full, click here.