With the advantages of low read noise and high-speed readout, CMOS technology has revolutionized astronomical imaging.
TheQHY533M/CIs a new generation of back-illuminated CMOS (BSI) cameras with 3.76um pixels.
QY533M/C cameras use sensors similar to those in the successful QY533M/C camerasQHY600YQHY268, with zero glare and low noise level.
BSI
One of the advantages of the back-illuminated CMOS (BSI) structure is the improved capabilityfull well,which is particularly useful for sensors with small pixels. In a typical front-illuminated sensor, photons from the target that reach the photosensitive layer of the sensor must first pass through the metal wiring that is embedded just above the photosensitive layer. Thus the wiring structure reflects some of the photons and reduces the efficiency of the sensor.
However, in the back-illuminated sensor, it is allowed thatlight enters the photosensitive surface from the reverse side. In this case, the sensor's integrated wiring structure is below the photosensitive layer, so more incoming photons hit the photosensitive layer and more electrons are generated and captured in each pixel. This ratio of photon to electron production is called thequantum efficiency. The higher the quantum efficiency, the more efficient the sensor is at converting photons into electrons and, therefore,the more sensitive the sensor will be for capturing an image of something dark.
No amplifier noise (Zero Amplify Glow)
This camera also has no amplifier noise (amp glow).
Anti-Dew Technology
With almost 20 years of experience in the design of refrigerated chambers, qHY has implemented total dew control solutions in its astroimaging chambers. The optical window has a built-in dew heater and the chamber is protected against internal humidity condensation: on the one hand, with aelectric heating plate on the visorTo prevent the formation of dew and on the other hand, the sensor itself is kept dry with the design ofsilicone gel tube bushing(included) to monitor the humidity inside the sensor chamber.
Cooling
In addition to the dual-stage TE cooling, QHYCCD implementspatented hardware technology to control dark current noise.
QHY533M
Design
Both versions QHY533M and 533C feature differentinterfacesDesigned to be more flexible for different uses in different scenarios.
QHY533C
QHY533CIncludes aadapter kitCOMBO E, which can be connected directly to the 55 mm BFL M48 MPCC interface or to the Nikon / M48 lensCanon DSLR(sold separately). It also includes ac-port threadAnd can directly mount a C-port lens.
As for theQHY533M, can be connected directly to thefilter wheel QHYCFW3 small. When the QHY533M + filter holder wheel combination is attached to a DSLR lens, only an additional DSLR lens adapter ring (sold separately) is required to complete focusing.
QHY533M/C comes with an additional tripod interface adapter. This makes it easier to shoot with a DSLR lens.
Adjusting the parallel position on the QHY533M
The QHY533M is connected by thread with thefilter holder wheel QHYCFW3S, the camera allows you to adjust the front of the 533M to the correct sensor angle, however, the sensor may not remain parallel to the wheel:
| Model |
QHY533M |
QHY533C |
| CMOS Sensor |
SONY IMX533 M |
SONY IMX533 C |
| FSI/BSI |
BSI |
| Pixel Size |
3.76um x 3.76um |
| Effective Pixel Area |
3080*3280 (includes the optically black area and overscan area) |
| Effective Pixels |
9MP |
| Sensor Size |
1 inch |
| A/D Sample Depth |
Native 14-bit A/D |
| Full Well Capacity (1×1, 2×2, 3×3) |
58ke- |
| Full Frame Rate |
USB3.0 Port:
Full Resolution 27FPS @8BIT 18FPS @16BIT |
| Readout Noise |
1.3 to 3.4e- |
| Dark Current |
-20C，0.0005e- /pixel/sec |
| Exposure Time Range |
30us-3600sec |
| Unity Gain |
|
| Amp Control |
Zero Amplifer Glow |
| Shutter Type |
Electronic Shutter |
| Computer Interface |
USB3.0 |
| Built-in Image Buffer |
1Gbyte DDR3 Memory |
| Cooling System |
Two-stage TEC coolerLess than 1S lower than ambient temperature -30C in continuous mode
More than 1S continuous mode or lower than ambient temperature -35C in single frame mode
（Test temperature +20°）
|
| Optic Window Type |
AR+AR High Quality Multi-Layer Anti-Reflection Coating |
| Anti-Dew Heater |
Yes |
| Telescope Interface |
- |
Support M48 (with adapter) |
| Back Focal Length |
Actual Back Focal Consumed: 14 mm (Combined with CFW)
Standard BFL: 17.5mm（±0.5）
|
17mm |
| Weight |
845g |
845g |
Mechanical dimensions
QHY 533M
QHY 533C
Accessories and adaptations
QHY533M
QHY533C
