Jump to content

Recommended Posts

Posted (edited)

Meade Polaris 80mm f11.3 achromat.

Just picked one up like new in box for very little.

Looking at tree branches at 150x the chromatic aberration does seem that bad at all to be fair.

Just wondering how it might do for planets?

Hopefully star test this evening and check Jupiter.

Even the mount seems very sturdy, better then some I've seen coming with scopes.

Thanks Gary 

PXL_20230207_123859302.jpg

PXL_20230207_123915105.jpg

PXL_20230207_130950744.jpg

Edited by stafford_stargazer
  • Like 2
Posted

Looks a great find. 80mm aperture and the long focal length (what does the label say on the telescope) makes for a forgiving Focal ratio (maybe f10) so reduced CA. Should give pleasing planet views. Observe patiently and you'll hopefully catch moments of good seeing.

  • Like 1
Posted

Should be fine at f11.3, certainly the right side of any chromatic aberration as per the attached chart. You’ll probably see some colour fringing the brightest objects but it shouldn’t be too intrusive.

A4031C54-5289-40D4-8B8F-8064E7F28609.jpeg

  • Like 1
Posted
6 hours ago, happy-kat said:

Looks a great find. 80mm aperture and the long focal length (what does the label say on the telescope) makes for a forgiving Focal ratio (maybe f10) so reduced CA. Should give pleasing planet views. Observe patiently and you'll hopefully catch moments of good seeing.

Thanks for reply.

Tried on Jupiter this evening, the views were very good to be honest, I didn't see any trace of CA even at 150x although seeing wasn't very good.

F11.3 so seems quite a nice scope.

Thanks again Gary 

Posted
1 hour ago, IB20 said:

Should be fine at f11.3, certainly the right side of any chromatic aberration as per the attached chart. You’ll probably see some colour fringing the brightest objects but it shouldn’t be too intrusive.

A4031C54-5289-40D4-8B8F-8064E7F28609.jpeg

That's a great chart, thanks, I saw no evidence of CA this evening on Jupiter.

Crisp views.. very nice to be honest.

Thanks for reply.

Gary 👍

  • Like 1

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
  • 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.