Engadget spent the weekend comparing the cameras of the iPhone 4S, iPhone 4, Galaxy S II, Nokia N8 and Amaze 4G. The iPhone 4S camera is a marquee feature of the device with its 8 MP sensor and an f/2.4 aperture lens. The 4S also shoots in full 1080p HD video.
With regards to the iPhone 4S, Engadget generally praised the quality of the photos and video the device took, saying, "The iPhone 4S is a pleasure to shoot with. The camera is ready to capture its first image within a second of launch, and tapping to focus after recomposing is painless and speedy...Its image quality rivals many point and shoot cameras in most conditions...Overall, we were most often pleased with photos we shot with the iPhone 4S."
Of course, Engadget found reason to praise the other phones as well. The Amaze 4G took sharper photos in Engadget's testing, for example. Engadget also noted that Apple's competitors offer more advanced manual controls over exposure, white balance and ISO sensitivity. Of course, there are a number of iPhone apps that provide similar features.
The iPhone 4S lost out big on battery life. Engadget noted that "After about two hours of wandering around town, shooting several dozen photos and about 10 minutes of HD video with each device, the iPhone 4S had just 30% of battery left." The iPhone 4, on the other hand, had 53% of its battery remaining, and that's with Engadget sending some emails and making some phone calls too. The worse battery life while using the camera can mainly be chalked up the fact that the iPhone 4S has to process much larger files due to its 8 MP sensor and 1080p video recording capabilities.
It's a good comparison, and we encourage you to read the whole thing.