Terrible Banding/noise and haze

[Adam_Corbett]

Hi Guys,

This is my first post on here, I have done some reasearch to see if similar problems have occured but nothing found.

I have taken 50 light frames 120sec @ ISO 800
10 Darks
10 Flats
10 Bias

These were taken on a Full spectrum 6D Canon.

I have tried running the canon banding script to no difference, can someone help as to why there is such bad banding/haze over the image, and also why the dust motes etc are still visible?

I have checked flats are good so I am a touch confused. I am very new to the programme also.

Many thanks

Adam.

[MortenBalling]

Hi Adam

It's really difficult to see any banding at the image you've attached, but you might try to shoot more bias frames (like 100). It's quickly done, and you can even do it on a cloudy night. Basically, 10 calibration frames is too little.

Also try and blur your flatstack slightly. Or run TGVDenoise on the Flatstack and try to calibrate again using that.

Do you dither your mount? That can have tremendous results, especially with DSLR.

Best

Morten

[naavis]

Adam, are you maybe referring to the lens flare bands visible in the image? They are not caused by the sensor, but reflections in the optics caused by a bright star.

[Adam_Corbett]

Hi guys,

Thanks for the speedy replies. I originally tied more calibration frames (30 of each) maybe I need more? Morten I have not ventured into dithering just yet but I do plan on it.

The light from the near bright stars is not what I am talking about but it does upset me a touch also, the scope has just started producing these recently, is it normal? As I have taken numerous other images where this has not happened.

I am not sure how to show a bigger image as this one is close to the size limit.

I am also not sure if in the lower right corner you can see the dark spots from the dust on the optical train that have not been subtracted off, I can see these in the flat frames.

Adam