From the Manufacturer:
The IQ280 digital back offers some of the highest resolution captures of any commercially available cameras. The 80 megapixel captures, enormous dynamic range and unparalleled image quality makes it an ideal solution for a wide array of photographic disciplines. With it you can capture incredible details and reproduce your images in virtually any format and size with a minimum of post processing ISO 35. This is how low you can go with the IQ280. No other camera or digital back can do this better than the IQ280. With this low ISO setting you are sure to get silk-like smooth images. Moreover the low ISO gives away the fact that the IQ280 lets you successfully capture images with a huge dynamic range and still retain unparalleled image quality.
Image capture is a breeze with an IQ2 digital back. Whether you are shooting to a memory card or shooting tethered to a computer using USB3 or FireWire, we have designed the IQ2 backs to give you a fast and continuous capture experience. Using Capture Pilot on your iPad or iPhone, you can connect wirelessly to an IQ2 digital back and enhance your capture process and productivity.
IQ2 digital backs combine functional design with rugged and durable build quality. The backs are made of 100% aircraft grade aluminum and all electronic connectors and ports are protected with automatic retracting hatches or rubber covers to ensure they work continuously even in the toughest shooting environments.
This digital back includes Phase One's Classic Warranty, which offers 1-year coverage. Covers repair of manufacturing defects, product defects within the first month, unlimited shutter actuations, the Investment Protection Program, and 24/7 online access to the support forum and knowledge base articles.