Jump to content

740427863_Terminatorchallenge.jpg.2f4cb93182b2ce715fac5aa75b0503c8.jpg

polar scope calibration help....


Recommended Posts

Evening folks, is there a newbie's guide to polar scope calibration anywhere ? IV looked on here and google and YouTube and can't find what I'm looking for.

I just got my first eq mount, a second hand EQ3-2, and soon realised that the polar scope ncp reticule was in back to front so all the words where backwards etc. I took out the PS and removed the little etched reticule thing and put it in the correct way. But I guess now I need to calibrate the reticule in the scope for accurate polar alignment.

How do I do this?

Thanks (apologies if IV missed the obvious here)

Link to comment
Share on other sites

Cheers space boy.

You know its not the actual polar scope that was inserted wrong (is that even possible) but the little glass screen inside the PS was fliped round the wrong way. Heaven knows why, manufacturer assembly error? Previous owner not having a clue? .....

Link to comment
Share on other sites

Hi there...downloading the manual is only the first step....understanding them, well let's just say I found outlining the minor themes of Kafta's 'the trial' a little easier!

One think I hadn't picked up (and maybe I read it too quick and missed something) was the need to re-centre the 'distant target' between the 180deg flips.

Doing this really helped me and therefore my polar alignment.

I centred the crosshairs on the top left of a telegraph pole around 400metres away.

Rotate the mount 180deg in RA.

The pole has moved so I use the three grub screws to move the cross hair half way back to the target.

Then re-centre the target using the alt & azi screws.

Rotate the mount back 180deg in RA.

Pole has moved

Move crosshair half way towards target using grub screws.

Re-centre using alt-azi.

Rotate mount 180 deg in RA.

Repeat until the target doesn't move when mount is rotated in RA.

Simples....

Michael

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.