I have the number of pixels to dither set to 30 pixels in Guidemaster. The guidescope has a FL of 1250mm and the image train 300mm. So this is about 7 pixels at the image sensor. The bigger the dither range the better the smoothing.
Here is the full frame of the test area in Grus. I chose it because it was so nondescript only to find a planetary in the field. I wondered at first why a donut would be bright!
3MB. FoV is 7 X 4.6 degrees.
http://d1355990.i49.quadrahosting.co..._09/dithff.jpg
The planetary is IC 5148.
There are better images here
http://www.iceinspace.com.au/forum/s...ghlight=ic5148
and here
http://www.iceinspace.com.au/forum/s...ad.php?t=65658
I have been using dithering for some years but never really did a proper test. It is very useful to pause sometimes and work out if you could do it better.
You lose some time as you have to delay between images for the guiding to settle down to the new position. I use about 20s.
Bert