Celestron xcel

[Connorbrad98]

I got a Celestron xcel eyepiece and it seems to be showing astigmatism in my scopes I know it's only at the edges but I find it distracting me scopes are f5 and I got a f6 dob anyway would the 18.2mm Delite be worth buying replacing my 18mm Celestron xcel?

[Louis D]

Is this another Celestron Xcell eyepiece giving you problems or the same one you posted about below:

If so, why the duplicate post?  Why not continue the original thread with your current question?

[Connorbrad98]

3 hours ago, Louis D said:

Is this another Celestron Xcell eyepiece giving you problems or the same one you posted about below:

If so, why the duplicate post?  Why not continue the original thread with your current question?

It's the one with bits of orange around it would the 18mm Delite be a good upgrade from this eyepiece?

[Louis D]

1 hour ago, Connorbrad98 said:

It's the one with bits of orange around it would the 18mm Delite be a good upgrade from this eyepiece?

A very good upgrade, but it still can't correct for field curvature of the primary, so check that first by refocusing for the edge.

In my tests of the Meade 5000 HD-60, generally considered optically similar to the Celestron X-Cel LX, the 18mm does have some edge astigmatism at f/6 in my field flattened 72ED refractor as revealed by blurriness below:

However, it's pretty minor compared to a Konig or even the Paradigm/Starguider BST.  The Delite should be at least as sharp to the edge as the Nagler T4.