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17mm Hyperion VS 17.3mm Delos

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#1 Darren Drake

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Posted 21 April 2012 - 08:07 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

#2 howard929

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Posted 21 April 2012 - 09:27 AM

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

Howard

#3 Darren Drake

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Posted 21 April 2012 - 10:01 AM

Yes I want the 20mm of er.

#4 Jeff Morgan

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Posted 21 April 2012 - 11:34 AM

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.

#5 Scanning4Comets

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Posted 21 April 2012 - 12:13 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,

#6 whirlpoolm51

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Posted 21 April 2012 - 06:18 PM

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

#7 Scanning4Comets

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Posted 21 April 2012 - 06:56 PM

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

NGC-2158

Cheers,

#8 GeneT

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Posted 21 April 2012 - 08:16 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.

#9 SeattleScott

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Posted 21 April 2012 - 10:52 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?

#10 eklf

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Posted 22 April 2012 - 09:37 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.

#11 DaveJ

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Posted 22 April 2012 - 11:28 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.


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

#12 Scanning4Comets

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Posted 01 May 2012 - 09:42 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.

#13 Jon Isaacs

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Posted 02 May 2012 - 05:33 AM

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

#14 Scanning4Comets

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Posted 02 May 2012 - 04:48 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. :lol:

Bring a 6mm Delos though, because I no longer have it! Ask Hernando, he has it now, :lol: :rofl2:

Cheers,

#15 Darren Drake

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Posted 02 May 2012 - 05:40 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....

#16 simpleisbetter

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Posted 02 May 2012 - 05:58 PM

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

#17 Scanning4Comets

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Posted 02 May 2012 - 06:05 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! :grin:

#18 dscarpa

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Posted 02 May 2012 - 06:05 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

#19 kkokkolis

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Posted 02 May 2012 - 11:50 PM

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.

#20 drollere

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Posted 03 May 2012 - 12:16 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.

#21 Clay Gilliland

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Posted 03 May 2012 - 04:41 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.

#22 ibase

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Posted 03 May 2012 - 09:08 AM

Bring a 6mm Delos though, because I no longer have it! Ask Hernando, he has it now, :lol: :rofl2:


Mark, I wish that were so, but it's still with my buddy in Canada! :foreheadslap: He said he is scheduled to arrive here May 12 with the Delos 6mm, I'm counting the days! :crazyeyes: 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,

#23 russell23

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Posted 03 May 2012 - 09:20 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

#24 dscarpa

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Posted 03 May 2012 - 09:50 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

#25 Darren Drake

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Posted 10 May 2012 - 12:06 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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