Whats wrong here ?

[paul mc c]

Any ideas what is causing this with my image,it seems to be showing pixels,i am using a zwo 224mc,when i had a 120mc i didnt seem to get this on images.

Any ideas?

[vlaiv]

Can you be a bit more specific? I'm not seeing anything that would draw my attention to it as being "wrong".

[tooth_dr]

Nice image Paul. What do you think is the issue?

[paul mc c]

Its hard to explain,i seem to see very small squares on the images,you can see them on the peak,obviously when you zoom in on the image you, not surprisingly, can see them clearly,maybe its just me,but i never noticed this before.

[Zakalwe]

6 minutes ago, paul mc c said:

Its hard to explain,i seem to see very small squares on the images,you can see them on the peak,obviously when you zoom in on the image you, not surprisingly, can see them clearly,maybe its just me,but i never noticed this before.

If you zoom far enough into any picture you will see pixels.

The pixel size on the 224 and 120 are identical at 3.75 microns, so it's not that. Have you checked your de-Bayer matrix settings? To me, the picture looks OK though.

[paul mc c]

2 minutes ago, Zakalwe said:

If you zoom far enough into any picture you will see pixels.

The pixel size on the 224 and 120 are identical at 3.75 microns, so it's not that. Have you checked your de-Bayer matrix settings? To me, the picture looks OK though.

Funny that crossed my mind,how do i check this,and what should i see.

[vlaiv]

2 minutes ago, paul mc c said:

Funny that crossed my mind,how do i check this,and what should i see.

Take raw frame, any of them and zoom in so you can see pixels - look in the corner (top left). Out of 4 pixels in the corner (2x2), two should have same intensity and be at diagonal - these are green pixels. You can see which two by looking at the rest of the image - there will be distinct pattern of these forming X kind of mesh over the image.

You need to get green pixels right, what is left will be blue and red, and these two you can get "wrong" and fix it up in post processing - just swap red and blue channel.

If observed pattern is:

_X
X_

(x representing similar intensity and continuing over the image as distinct pattern). Then your bayer pattern is either RG or BG.

If pattern is

X_
_X

then your bayer pattern is GR or GB.

My guess is that your pattern should be RG (most asi cameras have that one).

Do you do flats? Maybe pixel pattern can appear if two conditions are met: a) you did not take flats, b) it was very still evening and frames did not "distort" too much and your tracking was spot on - no drift at all during imaging run.

It of course might be due to particular setting in processing that is causing this (not sure what I would recommend that you check or change).

[Zakalwe]

According to this page, the matrix for the 224 is RGGB

https://bbs.astronomy-imaging-camera.com/viewtopic.php?f=21&t=2077

 

This page says that the Bayer matrix for the 120 is GRBG

https://bbs.astronomy-imaging-camera.com/viewtopic.php?f=21&t=2193

 

Based on that, I reckon that we've found your problem. you need to change your Bayer matrix setting in your stacking program.

[paul mc c]

1 minute ago, Zakalwe said:

According to this page, the matrix for the 224 is RGGB

https://bbs.astronomy-imaging-camera.com/viewtopic.php?f=21&t=2077

 

This page says that the Bayer matrix for the 120 is GRBG

https://bbs.astronomy-imaging-camera.com/viewtopic.php?f=21&t=2193

 

Based on that, I reckon that we've found your problem. you need to change your Bayer matrix setting in your stacking program.

I love this site.....?