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One benefit of the back-illuminated CMOS structure is improved full well capacity. This is particularly helpful for sensors with small pixels. When back-illumination is combined with somewhat larger pixels, the full well capacity and cynamic range are improved dramatically. The QHY410C has a full well capacity of 120k electrons! With its low read noise this produces a dynamic range greater than 17,000:1 or more than 14 STOPS. Moreover, the dynamic range remains fairly uniform even at higher gain settings.
The QHY410C is capable of only 1.1 electron of read noise at high gain and fast readout speed. One electron of read noise means the camera can achieve a SNR>3 at only 3 to 4 photons. This is perfect performance when conditions are photon limited, i.e., short exposures, narrow band imaging, etc., making this large area sensor ideal for sky surveys and time domain astronomy.
Sony's Exmor R back-illuminated technology produces sensors that Sony estimates are twice as sensitive as similar front illuminated sensors. QHYCCD tests have borne out this claim. Additionally, Sony sensors are well known for their low dark current. QHYCCD's proprietary thermal noise reduction technology and the QHY40C's dual-stage regulated thermoelectric cooling further reduce dark current to extremely low levels for clean, long duration exposures when required.
- QHYCCD COLDMOS QHY410C color camera
- 50,8mm adapter
- USB 3.0 cable
- 12V power cable with cigarette plug
- 12V power unit
In this table we have summarized main features of QHYCCD's cooled CMOS cameras to allow you to easily compare and choose the best one based on your telescope.
|Type:||Camera CMOS raffreddata|
|Resolution||6072 x 4044|
|Sensor dimensions (mm)||36 x 24mm|
|Sensor diagonal (mm)||43.5|
|Pixels dimensions (µm)||6|
|A/D converter||14 bit|
|Cooling||-35°C rispetto a T ambientale|
|Readout Noise (e-)||[email protected] gain. [email protected] gain|
|ST4 integrated autoguide port||No|
|Telescope interface||Filetto 54 femmina (54x0,75)|
|Connection to PC||USB 3.0|
|Power||External 12V 3A|