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Best High Power EPs for Apos

Started by RobertHowe, 06/02/2018 07:00PM
Posted 06/02/2018 07:00PM Opening Post
Hey friends, after five years finishing a music degree, falling in love and remarrying, I am back into doing astronomy regularly.  Skies have gone to hell where I live with lots of new construction and streetlights.  Most of my observing is from a roll off with three refractors, these being a TEC 180 f/7, a AP 130 f/8.35 and an AP Traveler (105 f/5.8).  I've never been an EP hound, after recovering from a nearly-lethal case of aperture fever a few years ago I settled on TeleVues: Panoptic 35, Pan 24, Nagler 22, Ethos 21, Pan 19, Ethos 13, Nagler 13, Nagler 9, Ethos 8 and Nagler 7.

Due to the skies I am doing more and more planetary and moon observing.  Most of the high magnification work is with the Ethos 13, 8 and Nagler 7.  I am happy with the quality of my views but wonder if there is room for improvement.

My question, are there other EPs that will give crisper views than these?  I recall some lovely views with a friend's Pentax eyepieces a few years ago.

Thanks for your answers.

Robert Howe
Wilbraham MA

TeleVue 85 f/7 // Astro-Physics Traveler 105 f/6 // Astro-Physics 130 f/8.35 // TEC 180 f/7
Coronado 60 DS
"Scopes, Brains and Wisdom--but no Beauty"
Posted 06/02/2018 09:19PM #1
I'm not sure that you're going to find crisper views in other eyepieces versus the quality eyepieces that you already have in the focal lengths noted in your post. Pentax eyepieces are an excellent choice in shorter focal lengths and the 5mm smcxw  or the 3.5mm, if your seeing supports the latter, would be good choices. They offer outstanding eye relief and a wide 70mm AFOV for their focal lengths. Orthoscopic eyepieces offer excellent resolution in planetary viewing but have narrow soda straw fields of view and marginal eye relief in shorter focal lengths. A popular inexpensive widefield eyepiece with good reviews can be found here:
Posted 06/10/2018 01:14PM #2
Very happy with my Pentax XW 10 mm and 7 mm and would highly recommend them as additions to your nice range.  I have longed for the 5 mm and 3.5 mm Pentax eyepieces but am not sure that I’d have enough opportunity to use them based on my current limited frequency of good sky conditions 
Posted 06/14/2018 09:35PM | Edited 06/15/2018 01:38AM #3
Based on my own experience, i recommend the ZAO-1 eyepieces for high power lunar/planetary viewing.
Posted 11/21/2019 02:03PM #4
Problem with high dollar high power EPs they will spend the most time unused. Seeing being the limiting factor. Nice setup by the way. I suggest a cheaper alternative, maybe pick up a nice used UO 6mm ortho or Celestron Ultima 5mm. See how much use you get out of them first. They both give very good planet views. The Ultima having a slightly wider field but still narrow.