Hello!! It's Joseph

done on 29 Aug, 2017 ISO800 35 mm f/4.5 36 x 30 secs with dark frame light frame bias frame

13 Aug, 2017 02:14 AM meteor lying low in the picture, behind the trees   15mm f/4.5 ISO400, 15 sec Canon EOS760D background info: international meteor organisation

setup. pretty much same as GitHub set up group set up project(s) set up members. as Masters create access ( push and pull ) password create SSH key. I use PuTTYGen to generate the key pairs ( detailed instructions can be found in DigitalOcean ) open command prompt in the same directory you saved the public key type id_rsa.pub | clip Then, login to gitlab, the key should be in 1 line, starts with  keyword "ssh-rsa", and  ends with your email gitlab has a tutorial on this Then install git on your raspberry pi, by opening a command prompt: sudo apt-get install git-core git init dowload your git files by opening a command prompt, for example: git clone https://gitlab.com/PZT01/Digital_to_Analog_PZT_driving_program.git  git add . git status git commit -m 'changed line 13, add some comments' git push

download noobs extract to microSD card boot choose (recommended) raspberry pi debian Jesse lite ( 3.8 GB) takes ~ 21  minute for download from internet and install ( wired ethernet speed at 3 MB/s) from menu, go to Preferences>Raspberry Pi configuration, or run "sudo raspi-config" for: timezone keyboard interfaces support, eg I2C, SPI, 1 wire, etc /etc/default/keyboard pc104 us /etc/network/interfaces.d if ethernet is not working, try to change "iface eth0 inet manual" iface eth0 dhcp auto install p7zip for decompressing .7z files   eg   7z x your_archive.7z      

from webastro forum ( in french), with help google translate: Hi planetary imaging fans,;) I've long dreamed about it, ZWO did it! The very promising sensor Sony IMX224 MC 1.27 Mpixels Has finally found its place in an astro camera and I was lucky to be able to test in preview. Thanks Sam! Before these first tests I was still a little skeptical, the announcement made by Sony concerning the IMX224 was quite thundering. And between marketing and reality, there are disillusionment ... http://image-sensors-world.blogspot.fr/2014/10/sony-announces-high-sensitivity-sensor.html After my first tests, there I must recognize that they are very strong at Sony! The IMX224 is keeping its promises, as announced: it is very fast, ultra-sensitive and the noise is really of a very low level. But I would come back. The camera takes up the same aluminum case as the ZWO ASI 120/174. And Point Gray Blackfly is tiny to the side (and heats up too, the small boxes have ...

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