Approve the Cookies
This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and our Privacy Policy.
Index  •   • New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Register to forums    Log in

FORUMS Photography Talk by Genre Astronomy & Celestial Talk 
Thread started 30 Oct 2017 (Monday) 15:48
Search threadPrev/next
sponsored links
(this ad will go away when you log in as a registered member)

polar alignment in Southern Hemisphere

37 posts
Likes: 1
Joined Apr 2014
Oct 30, 2017 15:48 |  #1

Hi all,

I just bought a tracker (iOptron) and iOptron app as well, currently I am struggling with polar alignment since I am in Southern Hemisphere, the Polaris Australis is very dim, I could see the Southern Cross. I wanted to do 2-3 min long exposure.
Any tip/ help would be appreciated.

Cream of the Crop
11,652 posts
Gallery: 215 photos
Best ofs: 24
Likes: 4235
Joined Aug 2007
Nov 17, 2017 11:34 |  #2

I have no experience with the iOptron but make sure you have it set for Southern Hemisphere. The switch marked N/S should be set to "S".

This might be helpful:​m/watch?v=iXVVBlvlhbE (external link)

Canon Gear: 1D Mark IV | 1D Mark II | 5D | 20D | 500L IS (f/4) | 100-400L
SteveEllwoodPhotograph​ (external link)

82 posts
Likes: 10
Joined Jan 2011
Dec 19, 2017 23:43 |  #3

I'm not familiar with the southern sky at all (alas), but from what I've read and what I'm seeing on Stellarium, you can use the Southern Cross as a rough pointer, to get you in the vicinity. It'll kind of point to Chameleon, then you can move anti-clockwise to Octans, which looks like an almost-right triangle. South of Octans (toward the true pole) you'll find four stars in sort of a trapezoid shape; the pole star is the top left star of the trapezoid, if the wider end opens down toward the horizon.

You could also try just pointing it due south (make sure to account for your local magnetic declination) and set the angle to the local latitude (tripod level, of course), and you'll probably be close enough for round stars and 2-3 minute exposures at reasonable focal lengths. At this point, you may be able to pick out the star in the polar alignment scope; not sure how it behaves optically though.

I know your post was quite a while ago; if you haven't gotten it working to your satisfaction yet, I hope it's helpful.

Some clicking occurred, a few lenses were involved, that's about all I know ...

37 posts
Likes: 1
Joined Apr 2014
Mar 11, 2018 17:13 as a reply to  @ andyjensen's post |  #4

Hi All,
Thanks for taking time to respond to my post. I have been trying other different methods from different forums, Facebook groups, etc. it is quite challenging to find the Sigma Octantis since it is so faint.
To my understanding, if I really wanted to spot on the Polaris Australis, I would need to have software (sharpcape,etc) and hardware (polemaster, telescope, etc) which I think it is one or two level up (deep sky, stars etc). At the moment I focus on the Milky way and widefield, imaging in the field, dark sky, sometimes you need to hike for a few Kms, and carry small laptop, I am not up to there yet.
once again really appreciated your posts you both.


Senior Member
300 posts
Likes: 43
Joined Nov 2009
Location: Sydney
Apr 22, 2018 19:30 as a reply to  @ ctvu's post |  #5

Any luck with this? What's the longest exposure you can take before drifting? Also might help if you can share a pic of a non-aligned image?

(Though I'm not familiar with the ioptron, so won't be able to help too much)

2x 50d: with 17-85mm f4-5.6, 100mm Macro USM, 50mm f1.8, 2x Sigma 30mm f1.4, 55-250mm (kit lens), Canon 100-400mm L, Tamron 200-400mm f5.6, Samyang 8mm. 480mm refactor with HEQ5. Home made beamsplitter stereo rig.

sponsored links
(this ad will go away when you log in as a registered member)

943 views & 3 likes for this thread
polar alignment in Southern Hemisphere
FORUMS Photography Talk by Genre Astronomy & Celestial Talk 
x 1600
y 1600

Jump to forum...   •  Rules   •  Index   •  New posts   •  RTAT   •  'Best of'   •  Gallery   •  Gear   •  Reviews   •  Member list   •  Polls   •  Image rules   •  Search   •  Password reset

Not a member yet?
Register to forums
Registered members may log in to forums and access all the features: full search, image upload, follow forums, own gear list and ratings, likes, more forums, private messaging, thread follow, notifications, own gallery, all settings, view hosted photos, own reviews, see more and do more... and all is free. Don't be a stranger - register now and start posting!

COOKIES DISCLAIMER: This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and to our privacy policy.
Privacy policy and cookie usage info.

POWERED BY AMASS forum software 2.1forum software
version 2.1 /
code and design
by Pekka Saarinen ©

Latest registered member is mycreditfocus1
747 guests, 231 members online
Simultaneous users record so far is 6430, that happened on Dec 03, 2017 Digital Photography Forums is the website for photographers and all who love great photos, camera and post processing techniques, gear talk, discussion and sharing. Professionals, hobbyists, newbies and those who don't even own a camera -- all are welcome regardless of skill, favourite brand, gear, gender or age. Registering and usage is free.