Jump to content

sgl_imaging_challenge_2021_annual.thumb.jpg.3fc34f695a81b16210333189a3162ac7.jpg

SW 127 MAk star diagonal


PRG
 Share

Recommended Posts

Managed to smash the star diagonal on my SkyWatcher SkyMax 127 supatrak auto :), so need to get a new one. Should I just replace it with the standard 1.25 inch star diagonal for around £35? Iv'e seen some posts that some versions of this scope have a 2 inch. Can this be done, and would it need a different adaptor on the back plate of the scpoe? Also, is it worth getting the Deluxe Di-electric coated version for around twice the price?

If anyone has changed the star diagonal on this scope I'd appreciate your help and advice.

Thanks

Link to comment
Share on other sites

Mine has a 2" diagonal, but I bought it that way so I'm not entirely sure what's original and what isn't. However, I think you need an adapter that fits on the back of the Mak to take the threaded ring on the diagonal.

James

Link to comment
Share on other sites

I've always replaced the standard diagonal with a higher spec one. My current "upgrade" model is the Astrotech 1.25" 99% dielectric coated one. It cost me about £50 a few years ago. I think (maybe incorrectly) that it's worth paying a little extra to get a good diagonal if there's even a chance it's going to improve the view on an otherwise good optical system. The quality of the view depends on the quality of the weakest link in the optical chain, after all, so why risk a weak link (cheap diagonal)?

There's a TeleVue 1.25 on AB&S at the moment for £50...

Ant

Link to comment
Share on other sites

Thanks for the advice, yes, I think I will go for a better quality one.

Also having unscrewed the back, the aperture on the rear of the scope is only 1 inch wide, so a 2 inch star diagonal will probably not help.

Will, It happened when I put my scope outside to cool. I'm not quite sure what happened, except as I was walking away there was a loud crash! :( I can't have put all three legs of the tripod on the ground, so the whole thing fell over. The star diagonal was the first thing to hit the ground. Luckily the OTA is fine.

I did manage to put the diagonal back together with the help of some superglue, and have had a couple of night observing with no apparent difference. I think I will still upgrade it though.

It does seem that in some scope positions the centre of gravity is quite near to the legs of the tripod, rather than the middle i.e. quite easy to overbalance.

So now when I move my scope outside I am very careful to make sure all three legs are down! :)

Link to comment
Share on other sites

Yes the SW127 does seem a little top heavy and when you have to re-level the scope I am always aware that the legs need to be re-tightened. My biggest worry are my three children, who don't seem to be able to look where they are going:-( I'm also worried that the mount only has a single screw into plastic to hold the scope onto the mount, I could see that give out at some point as well if you store the scope away from the mount.

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.