gocku_74
journeyman
Reged: 11/23/09
Posts: 5
Loc: Italy Bologna
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Hello! I'm Mike , and I Ask if anyone tried the eyepiece baader Hyperion 24mm , strengths and weaknesses of this eyepiece. I have a Dobson 12" f/5 ...and I'm very interesting to tried it.....thanks all.
Edited by gocku_74 (11/26/09 09:47 AM)
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BillP
Post Laureate
Reged: 11/26/06
Posts: 4638
Loc: Vienna, VA
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Mike,
Welcome to CN !!! 
There are many threads here on CN regarding your question. Below are some reviews and threads that should answer your question fully.
Review on Hyperion
Review comparing Hyperion to other similar eyepieces
Thread on Hyperion in fast reflector
Thread on first impression of the Hyperion
Hope these help.
-Bill
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Bill
XT10i Dob---TSA-102 S-APO---APM80/480 S-APO--- P.S.T.
The moment you stop questioning is when you know you've probably got it all wrong.
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gocku_74
journeyman
Reged: 11/23/09
Posts: 5
Loc: Italy Bologna
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Quote:
Mike,
Welcome to CN !!!
There are many threads here on CN regarding your question. Below are some reviews and threads that should answer your question fully.
Review on Hyperion
Review comparing Hyperion to other similar eyepieces
Thread on Hyperion in fast reflector
Thread on first impression of the Hyperion
Hope these help.
-Bill
Many Thanks for your help ! Clear Sky! 
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hfjacinto
Almost got me
Reged: 01/12/09
Posts: 3057
Loc: Union,NJ
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Hi Mike
Welcome aboard. I have the 24 MM Hyperion and on an F5 scope I would be reluctant to recommend it. It has a nice FOV but the outer 25% has astigmatism. I personally like the 21MM more, it has almost the same FOV and a higher magnification. It also has less astigmatism. I think the reason the 24MM is different is that it is a different design compared to the 3.5-21 MM Hyperions. For a little more the 24 MM MEADE SWA or UWA are better deals.
Just my 
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Celestron 9.25 w/FeatherTouch Focuser, ASGT Mount
Meade SN6 w/Moonlite Focuser, LXD75 Mount
Orion EON 80 MM APO Refractor
5,6,9 MM Zhummel Planetary 17 MM Nagler T4
31,36 MM Hyperion 15,19,23 MM Axiom LX
6.7,8.8 MM Meade UWA & 11,13 MM Nagler T6
Planetary, OIII and Narrowband Filters
Thousand Oaks Dew Control w Kendrick Heaters
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gocku_74
journeyman
Reged: 11/23/09
Posts: 5
Loc: Italy Bologna
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Hello! Thanks for your experience ...I contact the Unitron Baader trade and they said the Eyepiece 24mm have a 7 lens new design for only this focal wide angle , but for me the only eyepiece with the 100% pinpoint star at this focal is a Panoptic 24mm at the double and over the price. However for the price of Hyperion the edge without distorsion is 60-65% , and is acceptable for 100$ .... 
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Rustie
super member
Reged: 04/07/05
Posts: 106
Loc: Southampton, UK
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I'm also another who would be reluctant to recommend the Hyperion 24mm for your scope. I have the Skywatcher 8" f5 and my experience is the same as Helder. Only sharp over 65% of the field, very disappointing for £108 eyepiece. I replaced it with a secondhand Vixen 22mm LVW.....huge improvement. Also used a friends Skywatcher 16mm Nirvana (same as the William Optics 16mm UWAN) and that was mighty impressive. I'm tempted with the Nirvana. It has the same true FOV as the 24mm Hyperion but higher powered and corrected to a superior level. And only £20 more and a lot less than anything TV.
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Russ Hawker
Meade LX50 8" f10 SCT
Skywatcher 250PX 10" f5 Dobsonian
Meade 10x50
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BillP
Post Laureate
Reged: 11/26/06
Posts: 4638
Loc: Vienna, VA
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Rusty,
I don't believe the 16 Nirvana/UWAN will have the same TFOV as the 24 Hyperion. The 24 Hyperion will have a much larger TFOV as it has a larger Field Stop (28.5mm for the 24 Hyperion vs 21.2mm for the 16 UWAN). While the manufacturer lists the field stop for the 16 UWAN as 28mm, it is a mistake, if it did then it's AFOV would need to be over 100 degrees! We ran a short thread on it - LINK. So in the OPs 12" f/5 scope he'll get .27 deg more TFOV out of the 24 Hyperion vs the 16 UWAN. If he doesn;t mind the smaller TFOV then definitely agree the Nirvana/UWAN's better corrected FOV would be a plus.
-Bill
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Bill
XT10i Dob---TSA-102 S-APO---APM80/480 S-APO--- P.S.T.
The moment you stop questioning is when you know you've probably got it all wrong.
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Mark N
member
Reged: 01/03/06
Posts: 95
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Is the astigmatism that you see from the eyepiece, or from your eyes? What's the exit pupil size with the 24mm in your scope? Perhaps a diopter would make your eyepiece a more pleasant experience. I'm told that TV's diopter will go on it.
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RalphK
member
Reged: 02/07/08
Posts: 67
Loc: Outside Philly
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Agree with Helder and Russ - 24mm Hyperion performs fairly well in slower scopes but it is not a good choice for an f/5. I second the 24mm Meade SWA for about half the price of the 24mm Pan.
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Celestron Omni XLT 120
Orion ST80
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Albie
Post Laureate
Reged: 02/22/05
Posts: 3930
Loc: Alberta,Canada
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Hello and welcome to CN.I had the 24mm Stratus which I understand is pretty much a clone of the 24mm Hyperion.In my f/5 reflector there was way too much astigmatism in the outer fov for my liking.In my search to maximize fov and get good performance with my scope and 1 1/4" ep's I found the 24mm Panoptic and the 24mm Meade 5000 SWA.Both ep's get good reviews.I've decided to save up for the Pan because I don't like the Meade's eyecup which is too bad because it's probably a fabulous ep.
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Orion Starblast6
Meade 5k SWA 24mm,20mm and 16mm,Antares Speers Waler Series2 9.4mm, 7.2mm and 4.9mm.Meade 5k 2x TeleXtender.
Celestron Skymaster 15x70,Celestron Regal LX 8x42,Celestron Noble 10x28 and Pentax Papilio 6.5x21
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dscarpa
professor emeritus
Reged: 03/15/08
Posts: 505
Loc: San Diego Ca.
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I have Hyperions 8, 17 and 24. All of them are very good in my WO ZS 110 F 7 refractor and cats. In my Lumicon 80mm F 3.75 Super Finder the 8 and 17 are still good but the 24 is seagull city in about a third of the FOV. I have some astigmatism in my eyes but what I see in the SF-24 combo is different. David`
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Lew Zealand
scholastic sledgehammer
Reged: 06/28/04
Posts: 858
Loc: Pasadena, CA
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I have the 24mm Hyperion and the 24mm Meade 5000 SWA and the edges are much better in the Meade. The Hyperion was the latest in a line of increasingly expensive EPs I went through looking for a max TFOV wide angle EP in a 1.25" barrel and unlike the rest of the series (which are of a different optical design) is doesn't perform well at slow focal ratios (it's good in the f/10 SCT).
I chose the 24mm Meade SWA over the 24 Pan as it has less pincushion aberration and it has more eye relief. I can use the Meade with glasses on and see the entire FOV (just barely), I cannot with the 24 Pan. I can also see the entire FOV in the 24 Hyperion very easily with glasses on but now that's only for SCT and long refractor use.
FYI, other EPs i this general range I've tried are:
20mm GSO Superview - not bad but not real good. Still, a decent inexpensive intro to WA EPs
25mm Antares SWA - horrible even in medium-slow scopes, not worth the $$. OK at f/12 and up or barlowed.
32mm Meade 4000 Plossl - very good, max 1.25" TFOV, only 50° AFOV, though. A great match for a very slow 1.25" scope (long refractor, Mak-Cass, etc.) to get a decent exit pupil.
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8" LX90, StarBlast 6", 100mm f/6 achro, 60mm f/5.8 achro, 60mm f/11.7 achro, 10x50s, 15x70s
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phil piburn
sage
Reged: 07/15/06
Posts: 329
Loc: Kansas City Mo
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From what I have read, the Sebiert 28mm with 60 Degree might
be good. I have a Titan 20mm 72 degree. It's so-so in a F6
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gocku_74
journeyman
Reged: 11/23/09
Posts: 5
Loc: Italy Bologna
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Ok ....off axis in the 65% field started a distortion and astigmatism ...but have tried in f/5?? f/5 focal is acceptable?? ...f/4 is much more coma but f/5 it's less of 50%....
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