Ascom Dithering Aggressiveness

[cuivenion]

Hi, I'm wanting to use ASCOM dithering for unguided imaging. I understand that the dithering aggressiveness in BYE acts as a kind of multiplier for the PHD dithering settings, but I'm unsure what it means for ASCOM dithering. What does the 1-5 Dithering Aggressiveness setting mean in terms of pixels, (or arcseconds) when dithering in ASCOM without guiding? Thanks for your help.

[admin]

It's a bit of a hit and miss.  Try with the lowest setting and go up from there.

[cuivenion]

Hi, it's just that I've read that a 10-15 pixels is a good dither amount for dslrs. Woud the lowest setting be in that range?

[astroman133]

You should read this thread about dithering:

 

[admin]

15 minutes ago, cuivenion said:

Hi, it's just that I've read that a 10-15 pixels is a good dither amount for dslrs. Woud the lowest setting be in that range?

I don't know as this is all relative to your imaging train + guide scope/camera.

Try with the lowest setting and go from there.  This is a trial and error process for each individual setup.

[astroman133]

With unguided dithering there is no guide scope/camera, but the best setting would be dependent on the focal length of the imaging scope. With a longer focal length, the same guide pulse duration would move further from the start point. I would say that there is little benefit from moving more than 5-6 pixels. I like Guylain's suggestion of trial and error with the suggestion that if you are using a short focal length scope you may want to start with an aggressiveness of 3, and go up from there.

[cuivenion]

Hi, it'll be a 135mm camera lens, thanks for the replies I'll have a read.