The proof is in the pictures. Screenshots taken straight from Lightroom. See the upper right hand corner for the data under the Histogram. These pictures were from my previous Field Test on the camera.
Just a summation:
– The iPhone 4’s max ISO seems to be 1000 and the minimum seems to be 80
– The iPhone 4’s max shutter speed seems to be 1/2000th
– The iPhone seems to shoot at a constant aperture of F2.4
Once again, thanks to Devindra Hardawar for loaning me him iPhone for the test.