Περιγραφή
QHY183M is a model designed for astrophotography
beginners. It exhibits excellent sensitivity and low noise, with the
back illuminated 183 having higher sensitivity and somewhat higher
resolution. It is well suited to planetary and deep-space imaging
particularly when mated with the CFW3 filter wheel. This model has
two-stage thermal electric cooling of the sensor to about minus 40
degrees C below ambient for maximum reduction of dark current noise in
long exposures.
QHY183M incorporates QHY’s Anti-Amp Glow technology to significantly
reduce typical CMOS amplifier glow to a minimum, allowing excellent
calibration by subtracting a dark frame.
QHY183M utilizes the Anti-Dew features common to the QHY COLDMOS
cameras. Dew is moisture that condenses from the air onto the outside of
the chamber window. Frost is water vapor that freezes when it comes
into contact with the inside of the chamber window or the surface of the
sensor. QHY has nearly 20 years of experience designing cooled cameras
and these models benefit from those years of anti-dew and anti-frost
design experience. To help prevent dew from forming on the chamber
window heating elements are built into the light shield just above the
chamber. To avoid frost from forming inside the chamber a desiccant tube
is provided that can easily be attached by the user to the outside of
the camera when needed to dry the internal atmosphere of the chamber and
remove any built-up moisture.
QHY183 models can be used as guiding devices, too. The opto-isolated
guiding port is a standard ST-4 configuration using an RJ11 style
Jack. A guiding cable is included with each camera.
The 183 with its smaller higher resolution sensor is a good match to
short focal length telescopes or for imaging smaller dim objects through
a large scope. The larger 163 gives a greater field of view and would
be a good choice for imaging larger areas of the sky such as nebula or
when coupled to a longer focal length telescope to take greater
advantage of the scopes full field.
The QHY183M is a one-inch, 20 Megapixel back-illuminated monochrome
CMOS camera with a peak QE of 84%. The pixel size is 2.4um, yielding
high-resolution with modest size telescopes. The camera is capable of
producing 15FPS@20 Megapixels. It has a two-stage TEC that cools the
sensor to -40C to -45C below ambient. The ADC is 12-bit / 16-bit with
1e- read noise! The computer interface is USB 3.0 and exposure times
can be set from 50us to 3600sec.
