Camera 268C Color

QHY268 is a back-side illuminated cooled CMOS camera with 26 megapixels, true 16-bit A/D conversion and 3.76 µm pixels. The sensor size is 23.5 mm x 15.7 mm (diagonal 28.3 mm).

The QHY268 has extremely low dark current and uses Sony's Exmor BSI CMOS technology. In addition, the camera uses QHYCCD's patented technology to reduce thermal noise and a 2-stage thermoelectric cooling system to reduce dark current noise to extremely low levels.

BSI, back-illuminated CMOS structure:

One benefit of the back-illuminated CMOS structure is improved sensitivity. In a typical front-illuminated sensor, photons from the target entering the photosensitive layer of the sensor must first pass through the metal wiring that is embedded just above the photosensitive layer. The wiring structure reflects some of the photons and reduces the efficiency of the sensor.

In the back- illuminated sensor the light is allowed to enter the photosensitive surface from the reverse side. In this case the sensor’s embedded wiring structure is below the photosensitive layer. As a result, more incoming photons strike the photosensitive layer and more electrons are generated and captured in the pixel well. This ratio of photon to electron production is called quantum efficiency. The higher the quantum efficiency the more efficient the sensor is at converting photons to electrons and hence the more sensitive the sensor is to capturing an image of something dim.

Scope of delivery:

• camera
• Adaptor Ringschwalbe to M54
• Adaptor M54 to 2" plug
• USB 3.0 cable (1.5 m)
• Storage box
• Software (EZCap) and drivers (Windows system drivers and ASCOM) on CD