All my Astronomy mods and stuffs. All this blog is protected by the Attribution Non-Commercial Share Alike Creative Commons License. See creativecommons.org for more details.
This page follows this one : How to reduce the QHY5's noise (step 1)
Choose the right software ;-)
Another way to reduce the noise is to use a software filter. Qastrocam-g2 (link) now offers a noise reduction filter for the QHY5. This fitler uses the sensor's black pixels on each line to adjuste the black levels on these lines. Have look on these two samples :
One second dark frame at full gain, without filter...
... and with the filter :
One second light frame at full gain, without filter...
... and with the filter :
Sure, we loose some dynamic, but the SNR is much better ;-)
/https%3A%2F%2Fassets.over-blog.com%2Ft%2Fcedistic%2Fcamera.png)
/idata%2F3926033%2Fqastrocam-g2%2Fversion_5%2FScreenshot-from-2013-04-29-22-14-31.png)
/idata%2F3926033%2Fqastrocam-g2%2FScreenshot-from-2013-03-28-10-19-05.png)