8
Extra small “XS” size wheel for 8 unmounted filters D31 mm or
filters in 1.25” threaded cells.
Extra small “XS” size wheel for 7 unmounted filters D36 mm.
Small “S” size wheel for 12 unmounted filters D31 mm or filters in
1.25” threaded cells.
Small “S” size wheel for 10 unmounted filters D36 mm.
Please note the camera head is designed to either accept Internal filter
wheel or to be able to connect to the External filter wheel, but not both. If
the Internal filter wheel variant is used, External filter wheel cannot be
attached.
C2 cameras are manufactured with a wide range of CMOS sensors.
Probably the most important differentiating factor, fundamentally
affecting camera operation, is an electronic shutter implemented in the
sensors. C2 cameras support sensors with:
Global shutter, allowing capturing of the whole frame in the very
same instance of time. This means all pixels are reset and start to
capture light simultaneously. Global shutter is particularly
suitable for capturing fast moving scenes, because they ensure
image does not suffer from motion distortion, caused by rolling
shutter sensors. On the other side, frame rate of global shutter
sensors is lower compared to rolling shutter ones, because each
frame must be fully digitized prior to start of next exposure.
Rolling shutter, which resets individual image rows in a
sequence. The exposure of each image row is delayed typically by
a few tens of microseconds. Depending on this delay and number
of rows, the first and last row exposure time may be shifted by up
to several tenths of a second. The inherent feature of rolling
shutter sensors is a distortion of fast-moving scenes, when image
moves within the time individual rows are exposed. Luckily such
fast moving scenes are very rare in astronomy. The plus side of
rolling shutter is much higher FPS, as each image is already
exposed while the previous image is digitized.
