Old 01-09-2020, 09:18 AM
Stonius's Avatar
Stonius (Markus)
Registered User

Stonius is offline
Join Date: Mar 2015
Location: Melbourne
Posts: 1,081
Best focus method for Planetary?

Hey there,

I'm trying to streamline the process.

To really nail focus do you

  1. Slew to a star (in which case your go-to's must be spot on because the field is so small) then use a Bahtinov Mask and hope you can get back to the planet in question?
  2. Stay in place and use Bahtinov Mask on the moons (if visible)
  3. Use a v-curve autofocus routine? If so, in which software? Voyager would need to be specialy configured with a dragscript so it wont try and connect a guidescope, and SGP autofocus supposedly has issues (or have they addressed this?)
  4. Use contrast analysis like in Firecap?

Reply With Quote
Old 01-09-2020, 11:34 AM
multiweb's Avatar
multiweb (Marc)
ze frogginator

multiweb is offline
Join Date: Oct 2007
Location: Hinchinbrook
Posts: 19,854
Looking forward to the answer. Same problem.
Reply With Quote
Old 01-09-2020, 01:22 PM
Camelopardalis's Avatar
Camelopardalis (Dunk)
Drifting from the pole

Camelopardalis is offline
Join Date: Feb 2013
Location: Brisbane
Posts: 5,016
1 or 2

Depends on the target and what is nearby. Jupiter makes things easier as the Galilean moons are sufficiently bright. Otherwise you shouldn’t have to move too far for a sufficiently bright star...if you’ve already got the planet in the FOV, set the sync point and it should at least go back afterwards.

If you align the finder scope and main scope well enough, you should have a reasonable hit rate. I use a standard 50mm RACI on my C11 (+Barlow). Alternatively, you could employ a flip mirror.
Reply With Quote


Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT +10. The time is now 03:19 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Limpet Controller
NexDome Observatories
Astronomy and Electronics Centre