ASI533MC-P Horizontal Banding

ASI's Range of Specialised CMOS camera's

Moderator: Sam

Post Reply
mAnKiNd
Posts: 18
Joined: Tue Feb 20, 2018 3:29 am

ASI533MC-P Horizontal Banding

Post by mAnKiNd » Wed May 06, 2020 1:46 am

Hi,

I just opened up my new ASI533 today, did some indoor tests and wanted to ask and confirm whether random horizontal banding is normal for this sensor, as I read anecdotal reports elsewhere that it was clean and structureless.

Below are 3 sets of 3 continuous bias exposures showing random horizontal banding at default unity gain settings (Gain 100, Offset 70, USB Limit 40), with NINA native driver, NINA ASCOM driver and ASIImg at -5C. Power supply was a celestron powertank pro, USB cable was the one included in the box and laptop was plugged into an imuto 19V output power bank that I've been using with my laptop in the field for a couple of years now.

Here are 3 continuous BIAS frames with NINA Native Driver:
NINA_Native_1.png
NINA_Native_2.png
NINA_Native_3.png
Continued next post.
Last edited by mAnKiNd on Wed May 06, 2020 7:37 pm, edited 3 times in total.

mAnKiNd
Posts: 18
Joined: Tue Feb 20, 2018 3:29 am

Re: ASI533MC-P Horizontal Banding

Post by mAnKiNd » Wed May 06, 2020 1:47 am

Here are 3 BIAS frames with NINA ASCOM driver:
NINA_ASCOM_1.png
NINA_ASCOM_2.png
NINA_ASCOM_3.png
Continued next post.

mAnKiNd
Posts: 18
Joined: Tue Feb 20, 2018 3:29 am

Re: ASI533MC-P Horizontal Banding

Post by mAnKiNd » Wed May 06, 2020 1:50 am

Here are 3 BIAS frames with ASIImg:
ASIimg1.png
ASIimg2.png
ASIimg3.png
The banding is not very pronounced, though it does change structure and pattern with each frame. It will probably average out well in a master bias.

At Gain 0, the banding is much more pronounced and at Gain 360, minimal. It is also present in longer Dark exposures - I can provide screenshots and/or FITS files on request.

I'm not making a fuss or a complaint, simply asking if this is normal behavior for this sensor.

Many thanks,
Minos

Moson
Posts: 205
Joined: Wed Apr 01, 2020 8:28 am

Re: ASI533MC-P Horizontal Banding

Post by Moson » Thu May 07, 2020 10:16 am

Yes, this is normal behavior for this sensor. And it can be calibrate in post processing software

mAnKiNd
Posts: 18
Joined: Tue Feb 20, 2018 3:29 am

Re: ASI533MC-P Horizontal Banding

Post by mAnKiNd » Thu May 07, 2020 10:44 am

Thanks for confirming that, good to know it's not something wrong with my unit, power supplies or anything to do with indoor electromagnetic interference. It does indeed calibrate out well.

Post Reply