The QSI 520 model camera employs a 2 megapixel Kodak interline transfer CCD image sensor with microlens technology. The high quantum efficiency, wide dynamic range and low noise performance make the QSI 520 ideally suited to a broad range of demanding astronomical, scientific and industrial imaging applications. Electronic Shutter All 520 models utilize the electronic shutter built into the KAI-2020M CCD image sensor to control exposures. Shutter timing is very precise and can range from as short as 100 microseconds up to 240 minutes.