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Equipment Discussions >> Eyepieces

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Darren Drake
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17mm Hyperion VS 17.3mm Delos
      #5182871 - 04/21/12 09:07 AM

I have a bit a a gap in this focal length area and being the owner of a 10mm Delos I've been thinking of the 17.3 Delos but can't help but wonder if there might be a much more affordable alternative. Has anyone done a side by side comparison of the 17.3 Delos with a 17mm Hyperion? If I can get 90 % the performance for 1/3 the price that's hard to ignore here. I'm mostly using it with an f/4.4 dob and paracorr. Thanks

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howard929
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: Darren Drake]
      #5182962 - 04/21/12 10:27 AM

Have you ruled out the 68 degree FOV 16mm ES for $119?

Howard


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Darren Drake
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: howard929]
      #5183014 - 04/21/12 11:01 AM

Yes I want the 20mm of er.

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Jeff Morgan
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: Darren Drake]
      #5183164 - 04/21/12 12:34 PM

I loaned my 17.3 to an observing buddy to compare against his Hyperion in his 10 f/5 Newtonian. He used M35 as the target and after some time said the Delos was sharper. Tighter stars, better at the edges, better resolution on the nearby NGC cluster whose designation escapes me at the moment.

I took a quick look and agreed. Not having an interest in buying Hyperions, I did not do extensive A/B comparison. It will be interesting to see if he goes out to buys a Delos.

As far as "90% at 1/3 the cost" - probably. I really don't think that way though. For me it is a binary result - better or not.

Edited by Jeff Morgan (04/21/12 12:40 PM)


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Scanning4Comets
Markus
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: Jeff Morgan]
      #5183210 - 04/21/12 01:13 PM

No doubt that the 17.3mmm Delos will be really sharp right out to the edges. The Hyperion will have soft edges and if you like edge sharpness get the Delos!

Another alternative is the Orion / Vixen 17mm LVW!

Cheers,


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whirlpoolm51
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: Scanning4Comets]
      #5183752 - 04/21/12 07:18 PM

jeff i think you are talking about ngc 2185??? or it might 2815??? now it slipped my mind hahahah!!!!

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Scanning4Comets
Markus
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: whirlpoolm51]
      #5183790 - 04/21/12 07:56 PM

Wrong cluster there dude, it is NGC-2158. Pretty faint from the city.

NGC-2158

Cheers,


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GeneT
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: Darren Drake]
      #5183905 - 04/21/12 09:16 PM

Not always, but like that old saying, you get what you pay for. Many have posted that the Hyperions are great value for the money. However, the Delos are excellent performers. I own the six and plan to add the 8. I am going to do an A B comparison with my Nagler 12 and the Delos 12. Expensive eyepieces are just that--expensive. In my opinion, if they yield sharper views, then the extra money is well spent.

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SeattleScott
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: GeneT]
      #5184035 - 04/21/12 11:52 PM

The Paracorr would help, but I have heard the Paracorr works better with expensive eyepieces. Not having a Paracorr or a Hyperion I cannot say how much it would help. From what I have heard, one doesn't even need a Paracorr at F4.5 with a Delos or LVW. I do have some LVW's and they are sharp to the edge in my F4.8. And they are considerably cheaper than a Delos, although they are considerably more expensive than a Hyperion. Happy medium?

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eklf
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: SeattleScott]
      #5184476 - 04/22/12 10:37 AM

Consider the hyperion roundup by Daniel Mounsey - he compares the hyperion and ethos at 17mm - which might give a clue about Hyperion vs delos.

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DaveJ
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: eklf]
      #5184668 - 04/22/12 12:28 PM

Quote:

Consider the hyperion roundup by Daniel Mounsey - he compares the hyperion and ethos at 17mm - which might give a clue about Hyperion vs delos.




For the review by Daniel Mounsey that eklf mentioned, it's here


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Scanning4Comets
Markus
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: DaveJ]
      #5200973 - 05/01/12 10:42 PM

So it looks as if the 17mm Hyperion has a sharp field stop, whereas the others have fuzzy field stops. I like having sharp field stops in my eyepieces, so the 17mm would be nice to use.

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Jon Isaacs
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: SeattleScott]
      #5201297 - 05/02/12 06:33 AM

Quote:

From what I have heard, one doesn't even need a Paracorr at F4.5 with a Delos or LVW. I do have some LVW's and they are sharp to the edge in my F4.8.




An eyepiece does not reduce the coma so the coma has to be there and observable. A bright star taken to the edge is a good test.

Jon


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Scanning4Comets
Markus
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: Jon Isaacs]
      #5202389 - 05/02/12 05:48 PM

The 7mm XW and 6mm Delos shows stars sharp to the edges in my 10" f/4.72. If you don't believe me John, Fly down here and look into my scope yourself.

Bring a 6mm Delos though, because I no longer have it! Ask Hernando, he has it now,

Cheers,


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Darren Drake
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: Scanning4Comets]
      #5202493 - 05/02/12 06:40 PM

Since the Delos is to rich for my blood right now I found a 17mm Hyperion on the mart and sent out the check today. Will report back....

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simpleisbetter
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: Darren Drake]
      #5202525 - 05/02/12 06:58 PM

Congrats, I don't believe you'll be disappointed.

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Scanning4Comets
Markus
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: simpleisbetter]
      #5202539 - 05/02/12 07:05 PM

Darren,

Let us all know if the field stop in the 17mm Hyperion is sharp like others have stated...I am going to be shopping for one soon!


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dscarpa
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: Darren Drake]
      #5202540 - 05/02/12 07:05 PM

As the owner of a 17.3 Delos and former owner of a 17 Hyperion I have to say 90%? No way! The main issue I had with the Hyperion in my cats and refractor was the outer third of the FOV was quite a bit lighter giving DSOs a washed out look. Other than that it was a pretty good eyepiece with very good edge correction in my 80mm Lumicon Super Finder F3.75. However the Delos as I'm sure you're aware is a excellent eyepiece and it blows the Hyperion out of the water as far as image quality is concerned. I think a 17 Vixen LVW would be a good choice to use with the 10 Delos. David

Edited by dscarpa (05/02/12 07:09 PM)


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kkokkolis
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: dscarpa]
      #5203008 - 05/03/12 12:50 AM

The field stop of 17H is sharp. I don't get that outer FOV brightening. Nagler 17 is more spectacular (I don't know about Delos) but I couldn't let 17H go. Even if the TVs are better the 17H does its job effectively. If someone gets a better 17, there still is the option to change the focal length and continue to use it.

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drollere
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: kkokkolis]
      #5203030 - 05/03/12 01:16 AM

i am currently using the 31mm hyperion in place of the 30mm pentax XW, simply because it is lighter and the apparent field is just a bit wider. (i believe it is marketed as 68º AFOV but my drift timings gave 73º.)

there is noticeable astigmatism above a field angle of about 25º -- more than in either the 30mm XW or the 30mm meade 5000 "plossl" -- but i am not bothered by it. the eyepiece delivers a dark, scintillating field and vivid, natural star color. it's especially enjoyable with star and globular clusters and to put double stars in their natural habitat. the eye rest and eye relief are very nice.


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Clay Gilliland
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: Darren Drake]
      #5203125 - 05/03/12 05:41 AM

Good choice. I've been very pleased with mine. Blowing wads of cash to buy bragging rights just isn't that high on my list right now.

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ibase
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: Scanning4Comets]
      #5203433 - 05/03/12 10:08 AM

Quote:

Bring a 6mm Delos though, because I no longer have it! Ask Hernando, he has it now,




Mark, I wish that were so, but it's still with my buddy in Canada! He said he is scheduled to arrive here May 12 with the Delos 6mm, I'm counting the days! Until then, I can't comment on Delos threads.

I do have a sibling of the Hyperion 17mm, the Hyp 21mm, and it's a good EP, I like the big big eye lens and the comfort in using it owing to the generous eye relief.

Best,


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russell23
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: ibase]
      #5203456 - 05/03/12 10:20 AM

I have a 17.3mm Delos on the way. Skies Unlimited got them in stock yesterday. Mine should arrive tomorrow so I can expect clear skies in June to test it. Sorry people in upstate NY.

Dave


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dscarpa
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: Darren Drake]
      #5203515 - 05/03/12 10:50 AM

I have a 31 Hyperion Aspheric and Hyperion Zoom 2 both of which have better image quality and don't have the light outer FOV issue my regular Hyperions did. I bought the regulars about 4 years ago. Maybe the lighter outer FOV problem of the older ones has been addressed in newer runs. David

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Darren Drake
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: dscarpa]
      #5215480 - 05/10/12 01:06 PM

I should get the Hyperion 17 today and hope to get a chance to use it briefly in the 12 inch after I get back home tonight....

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Scanning4Comets
Markus
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: Darren Drake]
      #5215933 - 05/10/12 05:01 PM

Good stuff Darren!

I am re-vamping my eyepieces! I may pick up a 10mm XW and 17mm Hyperion. I need the 17mm to fill a gap I have been missing for a while!

The 17mm Hyperion + O-III and Ultrablock will do well for M-42 when it comes around again, and the 10mm XW will be a workhorse for a lot of things!

As long as the 17mm Hyperion has a sharp field stop, I would be willing to put up with less than perfect edges.

Let me know how it comes along!

Cheers,


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Darren Drake
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: Scanning4Comets]
      #5216788 - 05/11/12 09:47 AM

I had a chance to briefly use the 17mm Hyperion last night with the 12 inch f/4.9 with a paracorr 2 and saw very nice on axis images and the images towards the edge did degrade somewhat but not to much. I will have to compare with more detail with other eyepieces in a faster scope next week but considering the cost I'm very happy with the eyepiece.

I also noticed that the field stop is pretty sharp and with the comfortable eye relief the observing experience is quite pleasant. I look forward to more views with it soon.


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desertlens
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: Darren Drake]
      #5216887 - 05/11/12 10:49 AM

The 17mm Hyperion works very well for me in an ƒ10 SCT. Using a 2" diagonal, the Hyperions sit deep and actually shorten the ƒ-ratio a bit. With this diagonal the SCT is probably operating closer to ƒ11 with most EPs. At ƒ6, the edge performance falls off somewhat. I have no direct experience but I'd guess that the Delos would be better in faster scopes.

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Darren Drake
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: desertlens]
      #5221536 - 05/14/12 09:40 AM

I had a chance to use the 17mm last night with my f/4.4 with paracorr and was happy with the off axis performance. Stars stayed pretty sharp to the edge but I didn't do any deep sky viewing with my limited time I had. I suspect it is a good alternative to the Delos but still wanna do more comparisons soon.

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george tatsis
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: Darren Drake]
      #5841136 - 05/05/13 04:12 AM

Quote:

I had a chance to use the 17mm last night with my f/4.4 with paracorr and was happy with the off axis performance. Stars stayed pretty sharp to the edge but I didn't do any deep sky viewing with my limited time I had. I suspect it is a good alternative to the Delos but still wanna do more comparisons soon.




Darren,

Any update on this one since then?

George


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Jon Isaacs
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: Darren Drake]
      #5841193 - 05/05/13 06:52 AM

Quote:

I had a chance to use the 17mm last night with my f/4.4 with paracorr and was happy with the off axis performance. Stars stayed pretty sharp to the edge but I didn't do any deep sky viewing with my limited time I had. I suspect it is a good alternative to the Delos but still wanna do more comparisons soon.




If it's like the other Hyperion/Stratus eyepieces, look for the edge sharpness as well as a "bright edge." In my experience the Hyperion/Stratus's are not evenly illuminated across the field and are pretty messy off-axis in a fast scope.

Jon


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george tatsis
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: Jon Isaacs]
      #5841474 - 05/05/13 11:23 AM

Quote:

Quote:

I had a chance to use the 17mm last night with my f/4.4 with paracorr and was happy with the off axis performance. Stars stayed pretty sharp to the edge but I didn't do any deep sky viewing with my limited time I had. I suspect it is a good alternative to the Delos but still wanna do more comparisons soon.




If it's like the other Hyperion/Stratus eyepieces, look for the edge sharpness as well as a "bright edge." In my experience the Hyperion/Stratus's are not evenly illuminated across the field and are pretty messy off-axis in a fast scope.

Jon




The fast scope tolerance is a notorious minefield when it comes to non-premium wide field eyepieces. However, at f/6.3, my 8mm,10mm,13mm and 21mm Hyps work beautifully without any visible edge aberrations.Premium performance at a down to earth price

I addition, unlike some comments I've heard over the years regarding their field stop, my Hyperions have a sharp field stop and an evenly illuminated field.It must be the F/6.3 which happens to be more forgiving than the f/5 and f/4 scopes IMO.

Edited by george tatsis (05/05/13 01:17 PM)


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Scanning4Comets
Markus
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Reged: 12/26/04

Re: 17mm Hyperion VS 17.3mm Delos new [Re: george tatsis]
      #5841636 - 05/05/13 01:01 PM

Bottom line in a fast scope for both, (I have tried both):

17.3mm Delos: Needs a Paracorr, has the best transmission out of all.
17mm Hyperion: Not suitable in a fast scope and has edge of field brightening.

Alternative which I am getting soon myself: 17mm Vixen LVW: Excellent in a fast scope with only very minor edge coma and good transmission.

Cheers,


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george tatsis
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Re: 17mm Hyperion VS 17.3mm Delos *DELETED* new [Re: Scanning4Comets]
      #5841694 - 05/05/13 01:30 PM

Post deleted by george tatsis

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ohioalfa64
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: george tatsis]
      #5846706 - 05/07/13 09:49 PM

Let us know how the 17mm Vixen LVW compares here Markus.

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GeneT
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: Darren Drake]
      #5846761 - 05/07/13 10:21 PM

Quote:

I had a chance to use the 17mm last night with my f/4.4 with paracorr and was happy with the off axis performance. Stars stayed pretty sharp to the edge but I didn't do any deep sky viewing with my limited time I had. I suspect it is a good alternative to the Delos but still wanna do more comparisons soon.




If you get the chance, also compare it to a 17 Nagler. I owned one for years, but recently sold it because a 17 did not match up that well with a 12.5 inch, F5 Dob. The 17 Nagler often shows up on people's favorite eyepiece lists. It has 17mm of eye relief, enough for viewing with glasses. A 14 Delos fits in better for my viewing preferences on my telescope.


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Scanning4Comets
Markus
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: GeneT]
      #5846971 - 05/08/13 12:44 AM

Quote:

Markus

Excellent choice! Make sure you keep us posted though!
However, I get the feeling that you should have posted it on the Radian 18mm thread,right?

George




I was all set on trading my 22mm LVW for a 17mm LVW or an 18mm Radian. I was convinced by a few people, (Erik Wilcox), Jason, (Chopin), and (Mike B). to keep the 22mm LVW and not trade it off !!! Jason actually said he would drive up to my house and slap me if I did...LOL! Figuratively speaking of course!!!

So I decided to keep the 22mm LVW as I would regret trading it off for a 17mm Vixen LVW, so I am now saving up to get the 17mm LVW instead and have both the 22mm LVW and 17mm LVW in my aresenal !!! I bet the 18mm Radian is a really nice EP tho ! I still want to try one out anyways for fun!

Quote:

Let us know how the 17mm Vixen LVW compares here Markus.




Will do, when I get one, LOL!

Cheers,


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george tatsis
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: Scanning4Comets]
      #5847008 - 05/08/13 01:26 AM

I think it's about time we went back to the initial topic.

17mm Hyperion VS 17.3mm Delos

Not many replies here.I get the feeling that the owners of Hyp are pretty happy with what they've got, and see no reason for an upgrade.

Why should they after all, especially if their scopes are f/6+.Have no experience with the 17mm, but the 8mm,10mm,13mm and 21mm Hyperions worked good enough for me to make me sell the XWs last year.

No additional detail, or gain in general was visible with the more expensive, wide- field oculars used in the comparison, which included the corresponding fls of both the Delos and the Ethos.The FOV of the Ethos was impressive though.

George

Edited by george tatsis (05/08/13 01:31 AM)


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ohioalfa64
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: george tatsis]
      #5849710 - 05/09/13 10:27 AM

I understand this is being shanghai'ed. I am interested in the 17mm wide view eyepieces out there, which are priced from average to expensive. I like TV eyepieces, but am not wedded to them or others. An acceptable Vixen LVW version causes me no embarrassment to use it. Similarly a Hyp, is equally acceptable. I just want to learn from others here on the plus/minus of the choices.

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Starman81
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Re: 17mm Hyperion VS 17.3mm Delos new [Re: ohioalfa64]
      #5849865 - 05/09/13 11:45 AM

Quote:

I understand this is being shanghai'ed. I am interested in the 17mm wide view eyepieces out there, which are priced from average to expensive. I like TV eyepieces, but am not wedded to them or others. An acceptable Vixen LVW version causes me no embarrassment to use it. Similarly a Hyp, is equally acceptable. I just want to learn from others here on the plus/minus of the choices.




For the Hyperion vs Delos, I think the main differences are going to be in edge correction, edge of field brightening or field brightness, and transmission. I'm sure in the first 2, the Delos would have a nice-sized advantage and for the 3rd, would also be in the lead, but that would be more subtle.


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