Hopefully this is in the correct forum....so many to choose from!
So I have a 14 inch OO UK dobsonian on a TEPP equatorial platform. I need a better way of getting great polar alignment for astrophotography. Now I have a large aperture dob on an EQ platform, so I'm not expecting 300s exposures or anything and would be happy with 10s TBH.
I also have an OAG with ZWO ASI174MM mini, the platform has the ST4 guiding port, and I will be using a ZWO ASI2600MC with Antlia 5nm dual band filter with a view to using it for some DSOs. Oh and also a Nexus Coma/ 0.75x reducer.
So far I have been playing around with placing a laser in a TEPP laser holder that I attach to the RA axis at one of the ends. I just kinda guess using Stellarium etc where the actual celestial North is versus the North star. I've been using a ZWO ASI678MC and 2.5x powermate for some moon and planetary action. Realistically I'm getting about a minute at that mag before the image slowly moves enough that I re-centre and start again. Probably fine for planetary/moon but not DSO I expect. For visual on the moon I can have an Ethos 13mm in the eyepiece, wander off and 10 mins later there doesn't appear to be much movement.
I want the next level of polar alignment.
I was thinking of either the iOptron ipolar electronic polar scope or the QHY Pole Master. Both have a flat base that I can attach to my RA axis like I do my laser. I have no real idea how these devices work though and as mentioned, I'm not looking for massively long exposures as with 14 inches of F3.5 I don't think I need it. I've seen reviews where long exposures with the iOptron is problematic, but hat probably wouldn't be an issue.
Will my idea work? One better than the other? Any other options? I'm leaning towards the iOptron becase the setup of the polemaster talks about moving the mount 30 degrees then another 30 degrees to calibrate and I'm not sure this will be compatible with an EQ platform.
So my question (after all the waffle above), is will the iOptron ipolar work on an EQ platform?
Thanks you very much for your help. Polar alignment is such a pain!
Edited by Astro_Nic, 24 March 2023 - 03:48 PM.