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BillP
Post Laureate
Reged: 11/26/06
Posts: 3928
Loc: Vienna, VA
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That's what I did also...generally hung back to view the planets most of the time, and only once in a while bothering to get the full AFOV. Even hanging back though could easily view obliquely and still watch the planet reach the field stop.
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Bill Paolini
XT10i Dob---TSA-102 S-APO---APM80/480 S-APO--- P.S.T.
TMB Supermonos---Meade UWAs---TV Panoptic---AT Titan II ED
To your own eyes be true...
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nyc_nurse
sage
Reged: 07/29/09
Posts: 253
Loc: nyc
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Quote:
I ended up meeting my wife at the party as she came as a guest of a friend of mine!
Great review Bill and awesome story of how you met your wife. Would make for a good anniversary gift - his and her XO oculars!
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Sam P.
www.agirlandaguy.blogspot.com
Pentax 7X50
TV-102 APO w/ (Starbeam - on backorder  )
Ash Gibraltar w/ SkyTour DSC
NZ3-6, N9T6, N13T6
TV 20 Plossl
Pan 24, 35
Pentax XW10, XW14
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7331Peg
professor emeritus
Reged: 09/01/08
Posts: 718
Loc: North coast of Oregon
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Quote:
That's what I did also...generally hung back to view the planets most of the time, and only once in a while bothering to get the full AFOV. Even hanging back though could easily view obliquely and still watch the planet reach the field stop.
It's amazing how well that works on planets. I've found you can usually get a bit sharper and crisper view that way. Have no idea why, but it works.
John
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Tamiji Homma
Pooh-Bah
Reged: 02/24/07
Posts: 1084
Loc: California, USA
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Hi Bill,
excellent review as usual. XO (and specially XP series) is also designed for projection photography use in mind, ie: flat image with little distortion (ex: field curvature).
However, I've not seen any photo taken by users.
Even though taking full view isn't so easy with this eyepiece, I see clean/flat/distortion free Moon surface pretty much to edge of (small) FOV 
It's a shame to hear that Pentax may discontinue XO... I wanted them to expand to 7.5, 10, 12.5, 15 focal length instead. It seems we have very little hope for that. *sigh*
Tammy
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BillP
Post Laureate
Reged: 11/26/06
Posts: 3928
Loc: Vienna, VA
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I agree. It's a shame. I've written to the general contacts at Pentax Japan (Hoya now) but no response...I expect because I could not write them in Japanese. It was a hit or miss attempt on my part, but I tried. From my interactions the Pentax USA group seems to have little to do with any decisions, and also seems to have little insight into information housed at corporate Japan either.
A better tact might be to try to voice concerns to Takahashi instead as they seem to be dedicated to the Astronomy market. If they approached a new planetary line using the same concepts as the XO with its computer simulation based baffling, very specialized coatings, aberration-minimized design (the 3 items which I believe make the XO difference), then perhaps they will hear the calling.
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Bill Paolini
XT10i Dob---TSA-102 S-APO---APM80/480 S-APO--- P.S.T.
TMB Supermonos---Meade UWAs---TV Panoptic---AT Titan II ED
To your own eyes be true...
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Sgt
sage
Reged: 12/17/05
Posts: 484
Loc: Under the southern horn of the...
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Quote:
Quote:
it would probably fog up rapidly in my area with that eyerelief. Even my ethos does this at times.
Dunno. I let my stuff reach ambient temperature last night, which was unseasonably low, mid-20's Fahrenheit. At some point I had to put a little heat back into the 13mm Ethos because of fogging, but the 5XO never fogged up. I generally don't try to see the full 44 degrees in this eyepiece, except momentarily. Instead, I hang back, I'd guess from around 8-10mm away.
Hmmm.. may be I should have given it a go, just that the cost of admission is so high for something that may not be usable for me. Anyway my attention is now on that new leica zoom (even more expensive...)
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NickG
professor emeritus
Reged: 11/06/06
Posts: 527
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Congratulations on a really fine and well written review Bill. And for the great story about the Mars party and meeting your wife there,
Clear skies
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spaceydee
Postmaster
Reged: 04/16/04
Posts: 16119
Loc: Where the Kittens Are
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I've used the Pentax 5mm XO before, it is a fine eyepiece.
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Dee
space-scientist
student violinist
Nexstar8i,SV80S,80/9D,FC100,94 Brandon,TMB92SS,GM8
8" f/7 Discovery,12.5" Portaball, PST
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Greg77
newbie
Reged: 05/02/09
Posts: 1
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...just ordered one! Orthos sure are "A Planetary Weapon of Choice"! 
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Meade 127 ED Triplet APO
Vixen GP2 & DX tripod
Nikon 12X50 CF bino
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BillP
Post Laureate
Reged: 11/26/06
Posts: 3928
Loc: Vienna, VA
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Hi Greg and welcome to CN
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Bill Paolini
XT10i Dob---TSA-102 S-APO---APM80/480 S-APO--- P.S.T.
TMB Supermonos---Meade UWAs---TV Panoptic---AT Titan II ED
To your own eyes be true...
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