Old 03-07-2019, 01:05 PM
warpsl (Jason)
Registered User

warpsl is offline
Join Date: Apr 2012
Location: toukley
Posts: 47
Pentax xf 8.5 opinions?

Hello. I am looking for info on this eyepiece, how does it compare to a ortho or tak le7.5.I like it's small size for binoscoping.thanks.
Reply With Quote
Old 03-07-2019, 04:49 PM
ab1963 (Andrew)
Refractors-Thatís It

ab1963 is offline
Join Date: Jan 2015
Location: sydney
Posts: 398
I have had both of these eyepieces and preferred the Pentax, Larger FOV and longer ER more suitable for myself with nice contrast and neutral stars a very nice ep but alas still not enough FOV for myself so parted with it.....
Reply With Quote
Old 03-07-2019, 08:36 PM
MortonH's Avatar
Deprived of starlight

MortonH is offline
Join Date: Nov 2006
Location: Sydney
Posts: 3,290
The XF 8.5mm is very sharp and lightweight. It's been suggested/confirmed that it doesn't have the very best coatings like the more expensive XW line. My own experience was that there's a little bit of reflection from bright objects like planets but I still regard it as an excellent eyepiece. Eye relief is 18mm from memory.
Reply With Quote
Old 13-07-2019, 04:28 AM
Don Pensack's Avatar
Don Pensack
Registered User

Don Pensack is offline
Join Date: Aug 2006
Location: Los Angeles
Posts: 402
Reply With Quote


Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT +10. The time is now 11:18 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Lunatico Astronomical
Astronomy and Electronics Centre