Hi All. I have looked at a few discussions about this, but I am looking for a few more comparisons between the two types. I have the ES 100° 9,14, and 20mm, but I only have tried the Lunt Eng. XWA 5mm (4.77mm) from that line.
The ES 100° 14mm does not have a Lunt/WO/Myriad alternative, so I will leave that one out of the discussion.
My ES 100° 20mm corrects very well with my HRCC, but I am wondering if the Lunt XWA is even better corrected at the edge for astigmatism? The 20mm is also not parfocal with the 14 and 9. Don't get me wrong, I love the views in the 20mm, but if it's possible to get more eye relief in a lighter package that is better corrected and closer to parfocal with my other three 100° eyepieces, I'll definitely consider a switch.
The 20mm is the one that I'd look into replacing, but does anyone have any opinions on the ES 9mm versus the Lunt/WO/Myriad XWA 9mm also? I am not too concerned about weight with this one; mainly sharpness, transmission, and eye relief.
Can anyone also chime in on the ES 5.5 versus the Lunt/WO/Myriad/etc. XWA 5? Those aren't the same focal length (5.5 vs. 4.77mm), but I am curious.
My ES 100° 9mm is the one that got me back into 100° eyepieces. I had an ES 100° 20mm prior, but sold it because if its lack of eye relief, but I have learned to use it better this go around. When I saw a great deal on a 9mm, I couldn't pass it up. When I compared it to my former favorite eyepiece, the ES 82° 8.8mm, I was surprised by the increased perceived sharpness. I ended up selling the 8.8, and reacquiring the ES 100° 20mm.
People seem to like the Lunt/WO/Myriad, etc. clones, but I am not sure why they haven't caught on better.
I look forward to your opinions on this.