Here you can see a Quantum Scientific Imaging (QSI) QSI 583WSG CCD imager. CCD chip in the camera is 8.3 megapixel Kodak KAF-8300 (3326 X 2594 pixels). KAF-8300 is a full-frame sensor. The sensor has diagonal of 22.5 mm and pixel size of 5.4 X 5.4 um. The camera provides temperature regulation for the chip via thermoelectric Peltier cooler that can cool the chip up to 45 C bellow the ambient temperature. On this picture you can see QSI 583WSG variant with integrated guider port. Guiding is done via Orion Starshoot or SBIG-STi autoguider (adapter on the guiding port can be changed).

QSI 583WSG is a monochrome camera. The camera is equipped with 5 position internal color filter wheel, which is used for taking color images. Filters that I have installed in the filter wheel are Astrodon E series Gen II 31 mm filter set for LRGB color imaging and 31 mm Astrodon H-alpha 5 nm filter for narrowband imaging. Change of the filters during the imaging session happens automatically, and is controlled by the imaging software.

The camera is quite light, compact and very precisely made. It is very easy to work with. It doesn't create much strain on the focuser and mount due to its low weight. There is also a variant of this camera with 8 position internal filter wheel which is somewhat bulkier. But, on the plus side, you can put a full complement of LRGB and narrowband filters in it.

On this photograph you can see QSI 583WS variant, without integrated guider port. It has much shorter back focus, which makes it possible to use it with various SLR camera lenses for wide field astroimaging. QSI offers adapters for Nikon and Canon SLR lenses.

Of course, in such case guiding must be done via the separate guidescope. As a guidescope I'm using AT65EDQ mounted on the ADM side-by-side saddle parallel to the camera/lens combination. By unscrewing of the front cover the camera can be easily transformed from WSG to WS variant, depending on the imaging configuration wanted.

QSI also offers an adapter for Pentax 67 medium format lenses. Pentax 67 lenses have flange-to-film distance of 85 mm. That makes it possible to use them with QSI 583WSG body, together with autoguider port. That allows for much simpler and more precise guiding setup. The adapter screws on the camera body instead of T or 2.156" adapter.

When you change your imaging setup with QSI camera, you may have to do lots of screwing and unscrewing. If you change your setup often, an Allen wrench will become your best friend. Luckily, set of them is delivered with the camera...

Update July, 2016:

I've decided to try some narrowband imaging, so I've got an additional 5 position filter wheel for my QSI 583 camera. That filter wheel is equipped with Baader 1.25" narrowband filter set - H-Alpha 7nm, H-Beta 8nm, O-III 8nm and S-II 8nm for imaging and with Baader 1.25" Luminance filter for object acquisition and focusing. It is quite simple to exchange filter wheels between wheel for LRGB and wheel for narrowband imaging. All that is needed is small effort with Allen wrenches to unscrew front cover of the camera and one screw on the wheel itself.