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I thought my eyepiece collection was complete until I bought my "last ever" telescope. This operates at a native F8 and is just over 3250mm fl.
I have the longer Naglers, 31, 26, 22, 17 etc and 35mm, 27mm Panoptics. I was always a little disappointed with the kidney-beaning in the Naglers in other telescopes, though they were overall better than any other eyepiece I have used, but in this one they seem to be affected less and even the 26mm is now a keeper. Before I got the Naglers (over many years all s/h) I had 35, 27 and 19 Panoptics. These were my favorite eyepieces until the Naglers came along. I kept the 35mm as stars seemed a little sharper in the inner 50 degrees than the Naglers, but trailed off in the outer regions and the 27mm as it really is an exceptional eyepiece. In any case I often wanted to darken the sky with higher magnification so the longest ones were primarily used for sweeping and finding. Given sky brightness is becoming more of an issue I thought I would never need a longer focal length. Now the Naglers seem sharper over the entire view and with the higher magnification of a longer scope the sky is darker and I hanker after the widest possible field.
The issue is that the 82 degree 31mm Nagler gives me a true fov of 0.78 degrees and the 35 mm Panoptic 0.73 degrees. There is noticeably more sky in the 31mm Nagler. A 41mm Panoptic will yield 0.85 degrees, an improvement of nearly 10% over the Nagler 31. As I can readily see the difference in the amount of sky covered by the 31mm Nagler and the 35mm Panoptic I believe the time to look at a 41mm Panoptic is here.
Before going into a debate on whether ES eyepieces could fill the slot all I can say is that having been able to compare my old Naglers with new 82 degree ES ones in my scopes I and convinced that, for me, there is a small improvement with the Naglers at the outer regions of the field and so I am minded to discount them. They are fantastic value and I won't deny they are very good eyepieces.
The 41mm Panoptic would seem fit the bill for this long fl scope though I suspect it would be a disaster in a fast Newtonian, which I also have.
My quest is to find someone willing to part with theirs and/or suggestions of an alternative that someone has used in practice.
Thankyou for reading
I present you the second image taken with my Moravian G4-16000 camera mounted on my modified TeleVue NP101is.
Images and technical information below.
M13 globular cluster and its galactic area :
Full Resolution image 4k x 4k here : www.poigetdigitalpics.com/G4-16000/M13.htm
Full Resolution image here : http://www.poigetdigitalpics.com/Fichiers_Divers/M13new_image_Annotated.jpg
This is the first image i post here.
It has been taken in August/September from my backyard. It is one of my first image taken with my new Moravian G4-16000 CCD camera.
Taken with my TeleVue NP101is modified with a new focuser :
Modifications can be viewed here : http://www.poigetdigitalpics.com/photo-equipment3.html
SH2-171 in LHa - R(ha)GB :
Full resolution image in 4k x 4k at this link : http://www.poigetdigitalpics.com/G4-16000/sh2-171 New Version.htm
For Sale: TeleVue Ethos 3.7mm SX eyepiece