The iPhone 4 features an additional front-facing VGA camera, and an improved (backslide-illuminated, big physical pixel size) 5 megapixel rear-facing camera integrated with an LED flash. The rear-facing camera is capable of recording HD video in 720p at 30 frames per second. Both cameras make use of the tap to focus feature, part of iOS 4, for photo and video recording.[34] The rear-facing camera has a 5× digital zoom.
Here is some information on the iPhone 3GS camera:
The iPhone 3GS features an improved 3 megapixel camera manufactured by OmniVision. In addition to the higher megapixel count, it also features auto-focus, auto white balance and auto macro and is capable of capturing 640-by-480 (VGA) video at 30 frames per second. The iPhone 3GS's Camera app features a slider which allows users to switch between capturing photos and recording videos and a tap-to-focus feature which allows users to tap on an area of the camera image to auto-focus on.
Here is some information on the iPhone 3GS camera:
The iPhone 3GS features an improved 3 megapixel camera manufactured by OmniVision. In addition to the higher megapixel count, it also features auto-focus, auto white balance and auto macro and is capable of capturing 640-by-480 (VGA) video at 30 frames per second. The iPhone 3GS's Camera app features a slider which allows users to switch between capturing photos and recording videos and a tap-to-focus feature which allows users to tap on an area of the camera image to auto-focus on.
