This is a good topic. Always assumed if I couldn't afford Televue eyepieces ( I can't), I might be missing a lot. From a number of these posts by experienced observers like Dave Mitsky and Kenny, it seems the other brands have closed the gap considerably.
If your PM to Ed is in the general vein of the topic and not about something else, I love to get that perspective in posts here.
Here is what I shared via the PM.
I am 69 and sure that the exit pupil of my 38/70 exceeds my pupil in my f5 Dob at 7.6 mm. But the image is full and bright so I don't care.
My goal is to max out the field of view. That trumps exit pupil for me.
In my opinion the 27 and 24 are too close to add value unless you have a VERY long FL scope.
FL scope / FL eyepiece = mag
AFOV eyepiece / mag. =Approx true FOV.
So run the numbers for any eyepiece to get the Mag and the approximate FOV.
I have 5 scopes today, a 6th that I sold, and a 7th at an observatory where I have use privledges.
I have the same set of eyepieces that I use in all of them. So I have made a table like the ones below for each one.
As I was building out my eyepiece set I looked at each purchase to see where I wanted to fill a gap so that I had the magnifications I wanted. The OP focused on Panoptics. I focused on Explore Scientific 82s.
Below is my full active set. I have Plossls and Kellners sitting in the "unused" box in addition to these.
I suggest you should work up a table like this. Include all of the eyepieces you actively use and/or might use. Then run your numbers to see what your mags are, your field of view and, if you wish, your exit pupils. Then your next eyepiece purchase will become obvious. If you want set it up in a spreadsheet.
Then decide which ones you might retire due to duplication, because you want something better in that slot, or which gaps you just want to fill
Here are the tables for my two most actively used scopes. The bolded ones are the ones I use most often in this scope.
Astro Tech AT102ED Refractor 102 mm/714mm F7
Resolving power - 1.1 arc seconds
AA SWA 38 mm/70 19X and 3.7 degrees FOV EP 5.4 mm 2”
Meade 20 mm/82 36X and 2.2 degrees EP 2.8 2”
ES 14 mm/82 51X and 1.6 degrees
ES 11 mm/82 65x and 1.2 degrees
ES 8.8 mm/82 81X and 1.0 degrees
ES 6.7 mm/82 106X and .7 degrees
Meade 5.5 mm/82 129X and .6 degrees
ES 4.7 mm/82 152X and .5 degrees
ES 8.8+2.5XB 202X and .4 degrees
ES 6.7+2.5XB 265X and .3 degrees
Baader Hyperion 8-24 zoom 30X to 90X
Baader Hyperion 8-24+1.5XB 45C to 135X
Badder Hyperion 8-24+2XB 60X to 180X
Baader Hyperion 8-24+2.5XB 75X to 225X
Apertura AD12 12”/305 mm Dobsonian/Newtonian, 1520 mm FL F5 FR
Resolving power - .4 arc seconds
AA SWA 38 mm/70 40X and 1.75 degrees FOV EP 7.6 mm 2”
Meade UWA 20 mm/82 76X and 1.07 degrees EP 4.0 2”
ES 14 mm/82 108X and .75 degrees EP 2.8
ES 11 mm/82 138X and .59 degrees EP 2.2
ES 8.8 mm/82 172X and .47 degrees EP 1.7
ES 6.7 mm/82 226X and .36 degrees EP 1.3
Meade 5.5 mm/82 276X and .29 degrees EP 1.1
ES 4.7 mm/82 323x and .25 degrees EP .94
ES 8.8+2.5XB 430X and .18 degrees EP .74
ES 6.7+2.5XB 565X and .14 degrees EP .48
Baader Hyperion 8-24 zoom 63X to 190X and .79 to .35 degrees
Baader Hyperion 8-24+1.5XB 94X to 285X
Badder Hyperion 8-24+2XB 126X to 378X
Baader Hyperion 8-24+2.5XB 157X to 472X
Edited by aeajr, 30 January 2023 - 09:40 PM.