Hello!! It's Joseph

ICX419AKL ( colour version ) and ICX419ALL (mono version) interlacedCCD   imaging sensor optical size: 8mm diagonal ( type 1/2") 752(H) x 582(V) effective pixels chip size: 7.40mm (H) x 5.95 mm (V) pixel size: 8.6 (H) x 8.3 um spec is a 1st gen SuperHAD CCD  commonly used in CCTV applications For inexpensive astrophotography, it is used in Orion StarShoot G3, and in Allied-Vision Guppy F-044 review here in cloudynights and here sensitivity: 1300mV typical @ 1/50 sec From Starizona: Full well capacity: 50000e- Read noise (RMS): 9e- Dark signal (at 0º C): 0.01e-/pixel/sec Gain: 0.79e- per ADU has a <1 FPS frame rate ( ?) stated on telescopes.net , selling at $399 astro-video on noise reduction

Lens Showing Under-corrected Spherical Aberration Ray Fan Plots, showing Spherical Aberration  Layout of lens with rays from an Off-axis Star  transverse ray fan plot from off-axis star Its axes are marked "EY" and "PY."  EY stands for transverse "error" along the y-axis; that is to say, how far from the z-axis a ray is when it passes by the focal position.  "PY" stands for "pupil" height along the y-axis; that is, how far from the z-axis a ray is when it enters the lens, or "entrance pupil." From Rohr's website and here  

1)  install java re 1.6 ( tested on java 1.8 v131, and working fine) take note of the installed pathname of java.exe 2) download from the binary package from Jan Kotek pixy2.zip. not from github ( the important pixy2.jar file is missing in github) ( instead of directly from yoshida) http://www.kotek.net/blog/pixy2_updated     3) setup  start the software by clicking the pixy2.exe file   when started, click the middle icon "Setup"         setup pathname for java.exe and pixy2.jar as it is on your computer         use > 200MB of memory, eg 400MB.

wikipedia

DeepSkyStacker is a very useful too you can download here . What is light frames, dark frames, flat frames, offset frames etc this is stacking settings i use here is my stack output of Ursa Major, Draco and Ursa Minor annotation using online astrometry upload