background

Imaging

The modern imaging of DSO targets involves a digital CMOS or CCD sensor, which have a pixel array and a processor that effectively counts photons as they hit each pixel.

The earliest astrophotos are from around 1830, where they are able to attach some of the earliest cameras to telescopes and use plates to make exposures.

https://en.wikipedia.org/wiki/Comparison_of_Canon_EOS_digital_cameras
https://en.wikipedia.org/wiki/Image_sensor_format
http://www.astropix.com/HTML/I_ASTROP/COMPARE.HTM

Imaging Equipment

NAME format sensor size (mm) sensor pixel size (um) bit depth resolution notes
Canon 500D/T1i APS-C
CMOS
    4752x3168 backup
Canon 550D/T2i APS-C
CMOS
22.3x14.9   4.3 14 5184x3456 60fps crop mode video
Canon 600D/T3i APS-C
CMOS
22.3x14.9   4.3 14 5184x3456 swivel LCD, full spectrum modified
ZWO ASI1600MC-Cooled
https://astronomy-imaging-camera.com/products/asi-cooled-cameras/asi1600mc-cool/
4/3" CMOS 21.9 diag   3.8  (3.75?) 12 4656x3520  
Lodestar X2
http://www.sxccd.com/lodestar-x2-autoguider
Mono CCD 6.45x4.75 Sony ICX829AL 8.2x8.4 16 752x580 guider camera
Orion SSAG (StarShoot AutoGuider)
http://www.telescope.com/Orion-StarShoot-AutoGuider/p/52064.uts
1/2" CMOS 6.66x5.32   5.2 8 1280x1024 guider camera

 

ASI1600MC-C

Manual:  https://astronomy-imaging-camera.com/manuals/ASI1600%20Manual.pdf

Bayer Matrix format is GRBG   ( https://pixinsight.com/forum/index.php?topic=10402.msg65444#msg65444 )
When doing StarAlignment in PixInsight, if they do not align then try using "Detected Stars" mode.
In my usage, "Star Detection" parameters that worked well were:

 

PixInsight
http://www.cloudynights.com/topic/547362-asi1600mc-e-adu-values-for-pi-subframe-selector/

 

reminder: C0/c1/c2/c3 are GRBG order for this CMOS sensor.

 

Canon EOS DSLR

Attaching DSLR (Canon EOS) to Telescope:

2" UltraWide Prime Focus Telescope Adapter (Canon DSLR T-Ring with 2" extension)
http://www.telescopeadapters.com/index.htm?all_canon.htm

Canon EOS DSLR adapter for 1.25" telescopes:
https://www.amazon.com/Solomark-Camera-Adapter-1-25inch-Telescope/dp/B00T4IRJPI/ref=pd_lpo_421_lp_t_3?ie=UTF8&psc=1&refRID=29NY7GTWASC83QHCKAYG

Canon EOS Power Adapter:  (battery is not practical for long duration exposures)
https://www.amazon.com/gp/product/B0092F974E/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1

Processing Notes

BIAS
CMOS/DSLR not really intended for SuperBias (but if not enough Bias, like under 20, a SuperBias might help).

DARKS

FLATS
Histogram should be near 50%.

PixInsight Manual Image Calibration, Registration and Stacking
http://trappedphotons.com/blog/?p=693