iPhone 4 Only iOS 4.1 HDR Photography Feature Coming Soon to Jailbroken iPhone 3GS and 3G
One of the new features in iOS 4.1 in the introduction of HDR (High Dynamic Range) photography for iPhone 4 users. With HDR option enabled in Camera app, you can take more detailed photos than what a normal photograph can show or capture. This feature basically takes three photos in quick succession, one properly exposed, one overexposed and one underexposed, and then combines all three to produce one single detailed photograph.
Made a Cydia tweak to allow HDR photos on 4.1 for the iPhone 3G and 3G[s]