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    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...

 

dark-1s-full-gain-no-filter.png

 

dark-nofilter.png

 

     ... and with the filter :

 

dark-1s-full-gain-filter.png

 

dark-filter.png

 

 

     One second light frame at full gain, without filter...

 

light-1s-full-gain-no-filter.png

 

light-nofilter.png

 

     ... and with the filter :

 

light-1s-full-gain-filter.png

 

light-filter.png

 

 

    Sure, we loose some dynamic, but the SNR is much better ;-)

 

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