Dithering....

You might actually benefit from deliberately introducing a small error in your Polar Alignment, yes, your stack may have slight rotation in it, but you might also be able to address part of the rain effect in parts of your image. But I agree with the previous poster, I don't think Dithering in 1-axis guiding is going to be very effective.

It all began when I found those black patches on my images. Besides those patches walking noise was visible (tried to point it with those arrows)



www.cloudynights.com/topic/726700-does-t...-set-of-dslr-images/

This is also the result without even know what is dithering.



This is a result of Stellarmate and 5px dithering. I think it is an improvement. Then I've read that in fact with DSLR people go even further with 10-15px.


So the 1st M33 is with Stellarmate and 10px dithering, then I had all those issues with Astroberry and Internal Guider dithering and tried the M33 above with PHD2.

gilesco wrote: You might actually benefit from deliberately introducing a small error in your Polar Alignment, yes, your stack may have slight rotation in it, but you might also be able to address part of the rain effect in parts of your image. But I agree with the previous poster, I don't think Dithering in 1-axis guiding is going to be very effective.

Hmm this is an interesting idea! A small PA error combined with dithering, it could work.

If you use PHD2 for dithering, set the dithering method to spiral or random if it is available. I had the rainfall problem and has been eliminated

mswhin63 wrote: If you use PHD2 for dithering, set the dithering method to spiral or random if it is available. I had the rainfall problem and has been eliminated

I had the random method checked


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