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Olivon 22mm 70 deg eyepiece

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#126 EuropaWill

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Posted 14 August 2015 - 09:03 AM

Since this is not a scaled design each focal length must be tested individually for this. The 22mm performance characteristics should not be assumed the same in the shorter FL's. 


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#127 25585

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Posted 17 July 2019 - 08:02 AM

That answer will vary, since different glasses wearers have different requirements in that regard. But it has a large "effective" eye relief, which is what counts, just like the TeleVue Delos, Pentax XW, Baader Hyperion, Vixen LVW, and several other 70 degree eyepieces with long eye relief. The AT AF70's extra-stiff eyecup reduces its effective eye relief, though it can be removed or folded down.

I would think very few eyeglass wearers would find the eye relief too small. I would put the eye relief at about 17mm above the eyecup when the eyecup is rolled in all the way, and 20mm from the lens.

Design allowing closeness to the eye lens is important for those who wear glasses. Compare with the Sky Watcher version, and Celestron 22mm Ultima LX, and you see that the Celestron has the least recessed, down-cupped eye end, it is also exclusively 2" fit.

 

 

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Edited by 25585, 17 July 2019 - 08:39 AM.


#128 Starman1

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Posted 17 July 2019 - 08:37 AM

In the Olivon version of he same eyepiece, the top is flat and no rubber eyecup projects above the flat surface top.

The Omegon Redline is identical to the Arcturus Ebony, Telescope Service Expanse ED, Astromania SWA, and the discontinued Astrotech AF70, with a very stiff eyecup sticking up many millimeters.

The shape of the discontinued Celestron Ultima LX and the SkyWatcher SWA are somewhat, uh, unique.


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#129 25585

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Posted 17 July 2019 - 08:43 AM

In the Olivon version of he same eyepiece, the top is flat and no rubber eyecup projects above the flat surface top.

The Omegon Redline is identical to the Arcturus Ebony, Telescope Service Expanse ED, Astromania SWA, and the discontinued Astrotech AF70, with a very stiff eyecup sticking up many millimeters.

The shape of the discontinued Celestron Ultima LX and the SkyWatcher SWA are somewhat, uh, unique.

Would you say, with its eyecup down, the Olivon has more effective eye relief than the Celestron? 



#130 russell23

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Posted 17 July 2019 - 08:47 AM

Would you say, with its eyecup down, the Olivon has more effective eye relief than the Celestron? 

Yes.  It had plenty for my glasses.  And it has a really nice, simple twist up eyecup design.  Very smooth and effective - although it cannot raise as much as what you get with the TV DeLite's and Delos. 


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#131 howardcano

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Posted 17 July 2019 - 08:49 AM

With my thick glasses, I'm nearly worst-case for eye relief requirements.  The Olivon 22mm is right at my limit.  In conjunction with the ES 68 28mm, they bracket my desired focal length of 25mm.  I'd rather have purchased a 25mm Delite!  On the other hand, they give useable options when we have more than one scope simultaneously in use.



#132 25585

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Posted 17 July 2019 - 08:55 AM

How heavy is the Olivon 22mm being 1.25". The Celestron is proper 2" for weight, but tough & roll-proof, good for outreach! 



#133 howardcano

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Posted 17 July 2019 - 09:02 AM

How heavy is the Olivon 22mm being 1.25". The Celestron is proper 2" for weight, but tough & roll-proof, good for outreach! 

Mine weighs in at 505g.  And it's 2" only, despite the incorrect labeling.

 

The eyecup can be removed for an extra 2mm or so eye relief.


Edited by howardcano, 17 July 2019 - 09:03 AM.

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#134 25585

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Posted 17 July 2019 - 09:07 AM

Mine weighs in at 505g.  And it's 2" only, despite the incorrect labeling.

Thanks, about the same then.

 

TS has their own version, with a screw-off rim for afocal use.



#135 Usquebae

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Posted 18 July 2019 - 07:01 AM

TS has their own version, with a screw-off rim for afocal use.

The TS design looks identical to the old Astrotech AF70 design.  I have the 17mm.  After stripping the top assembly I found a  common sized rubber eyeguard that fit perfectly on the threaded ridge around the eye lens.  I think the eye guard came from a Meade 4000 8.8 UWA, and is the same size as fits on ES68 24mm, and others.  I think the Baader winged eye guard is also about the same size.  Anyhow, in this arrangement my AF70 works great with or without glasses and is a great choice for outreach.  These 1.25"/2" combos with the screw-off barrel are also convenient for filter use:  put a 2" nebula filter on the EP and when you wanna use unfiltered view, just unscrew the 2" barrel and set it upside down on your table with the lens cap covering the filter.  Much easier than putting the filter on & off, especially through the 6 months of winter.


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#136 25585

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Posted 23 July 2019 - 04:59 PM

I have bought a TS version to compare with the Celestron Ultima LX. The latter with a GSO 2x 2" Barlow gives a good 11mm eyepiece.



#137 Starman1

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Posted 23 July 2019 - 08:15 PM

This series seems to be best in the 22mm focal length--unusually so.

The Vixen LVW has long had the reputation of also being best in the 22mm length, and the Baader Hyperion in the 21mm.

I think they may all be derived from the LVW's design, so this is not surprising news.


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#138 25585

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Posted 24 July 2019 - 06:57 AM

Vixen & Hyperion are 1.25", but Celestron & Olivon are 2". 

 

I know the Orion LVW version was optically identical to Vixen's own, but the Hyperion is 68° to LVW's 65°, the latter nearer to those 2" 22mm eps. A 22-5mm Delite would be great, and not really rival the 22T4.

 

I have not tried any Hyperion, but there is a review online by John Huntley comparing them with LVWs, the latter coming out ahead. 68° for 22mm must be close to the 1.25" limit I imagine



#139 prototype3a

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Posted 03 October 2019 - 12:47 PM

I just picked up a used Olivon 22mm 70deg and we got to try it out last night.  I'm pretty impressed.  I'm not sure I believe the quoted 20mm eye relief but the eye relief was comfortable for me and I like the really large eyecup though I wish there was more friction in the adjuster.  I took it apart and added some scotch tape to tighten things up a little bit.  I may fiddle with it a bit more after actually using it last night.

 

Anyway, I'm very curious now to try out the other eyepieces in the series.


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#140 25585

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Posted 03 October 2019 - 12:57 PM

Effective eye relief is a bit less, but not bad. Good ep and step shorter than the APM 30mm UFF, both being 70°. Olivon is a bargain IMO.  



#141 Starman1

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Posted 03 October 2019 - 03:39 PM

I just picked up a used Olivon 22mm 70deg and we got to try it out last night.  I'm pretty impressed.  I'm not sure I believe the quoted 20mm eye relief but the eye relief was comfortable for me and I like the really large eyecup though I wish there was more friction in the adjuster.  I took it apart and added some scotch tape to tighten things up a little bit.  I may fiddle with it a bit more after actually using it last night.

 

Anyway, I'm very curious now to try out the other eyepieces in the series.

The 17mm is about the same.

The 13mm is.....well, uh, just avoid this focal length.

The 32mm is good for f/8 and longer, but not shorter.

The 8mm, 5mm, and 3.5mm are all just OK--no obvious major problems, but not the equal of the 22mm or 17mm.


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#142 prototype3a

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Posted 03 October 2019 - 03:53 PM

I guess the search continues for something around 30mm then.  :-/  I have a Meade 4000 32mm plossl and the Zhumell 2" 30mm.  The Zhumell seems to have ... astigmatism?..  at the edges pretty badly and it doesn't seem as....  bright?...  as other eyepieces I have.  I'd say it gives a decent wide TFOV but it is hard to actually see stars through it.  The tiny AFOV of the Meade just makes it fairly pointless IMHO.  I haven't checked the math but I suspect the 22mm Olivon and the Meade are the same TFOV.

 

I was reading back in the thread some and I was thinking that I wouldn't mind paying a little extra to have someone...  experienced...  blacken the edges of the lenses in these eyepieces.


Edited by prototype3a, 03 October 2019 - 04:04 PM.


#143 russell23

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Posted 13 May 2020 - 12:09 PM

I wanted to bring up this thread again because the 22mm Olivon I originally bought had fallen victim to the usual sell to fund something else story years ago.   I recently picked up another one from eyepiecesetc.com.   The reason I picked it up is my glasses are just not fully correcting my astigmatism with the 30mm APM UFF.   There is absolutely nothing wrong with the 30mm APM.  However, I switched places for my last pair of glasses and the new optometrist reduced my astigmatism correction from 1.75 diopters to 1.5 diopters in my observing eye and from 2.5 to 1.75 in my non-observing eye.  Combined with the fact that you usually need a little more correction at night,  I just cannot get rid of the seagulls on brighter stars with my 30mm APM with these new glasses.  And the old glasses are so scratched I don't really want to use them.   

 

So I decided to pick up another 22mm Olivon with the idea that perhaps the smaller exit pupil would allow me to get pinpoint stars.   I was out with it last night before the Moon came out looking at various deep sky with it in my 102mm f/7 SV Access.  I was exactly right.  With the 22mm Olivon the stars are pinpoint sharp - perhaps just the slightest hint of seagulls on the very brightest stars.  The 22mm Olivon gives 32.5x and a 2.15 deg TFOV with the scope so it can serve as my finder eyepiece and lowest observing magnification. 

 

The 22mm Olivon reminded me of the reasons I started this thread 6 years ago.  It gave outstanding views and was sharp to the last 5% of the field in the 102mm f/7.  There is no EOFB and stars are truly nice pinpoints.  Nebula are bright and the eyepiece provide a nice opportunity to challenge myself teasing out faint stars in partially resolved star clusters.   This time I think it will have a permanent spot in my eyepiece case.  As I was using it last night I was questioning what I was thinking when I sold my original sample. 


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#144 russell23

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Posted 13 May 2020 - 12:12 PM

Since this is not a scaled design each focal length must be tested individually for this. The 22mm performance characteristics should not be assumed the same in the shorter FL's. 

I'm not sure if it is a scaled design but the part in bold is absolutely true.   I also tried the 13mm and the 8mm.  The 13mm would be great were it not for horrible EOFB.  The 8mm was just not impressive.  The 22mm is the star of this line as much as the 5.5mm Meade UWA is the star of that line.


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#145 25585

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Posted 14 May 2020 - 04:30 AM

I bought the Celestron Ultima LX version when someone said it was as good as the Vixen 22mm LVW, but wider AFOV. Generally I find that true.

 

Eye relief & exit pupil behaviour are great for glasses. My 22mm briges the gap between 17.5 Morpheus & 30 APM UFF. 

 

Don has posted that Olivon US is closing, so hang on to your 22!


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#146 russell23

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Posted 14 May 2020 - 08:55 AM

Last night was clear again for a little while.  I decided to check the 30mm APM with both my old glasses and my new glasses.  Stars were sharper with the old glasses.  So the adjusted astigmatism correction my new optometrist decided upon does not work as well for night observing. 

 

Now with the Olivon 22mm the new glasses were fine.  So apparently at an exit pupil of 3.1mm 1.5 diopters of astigmatism correction works for my eyes whereas at 4.3mm exit pupil I need 1.75 diopters of correction.  This is where it would be nice if the APM 30mm would fit the dioptrx I bought!



#147 25585

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Posted 14 May 2020 - 01:02 PM

Last night was clear again for a little while.  I decided to check the 30mm APM with both my old glasses and my new glasses.  Stars were sharper with the old glasses.  So the adjusted astigmatism correction my new optometrist decided upon does not work as well for night observing. 

 

Now with the Olivon 22mm the new glasses were fine.  So apparently at an exit pupil of 3.1mm 1.5 diopters of astigmatism correction works for my eyes whereas at 4.3mm exit pupil I need 1.75 diopters of correction.  This is where it would be nice if the APM 30mm would fit the dioptrx I bought!

I have bought a Dioptrx to try out on my non-TV eyepieces, most of my hoard. I will try it on my APM & its Altair twin. This purchase is mainly fit trials.

 

My latest prescription was more corrected for astigmatism, and has not made as much difference as I hoped. I need to research opticians & speciality lenses more next time.   


Edited by 25585, 14 May 2020 - 01:03 PM.


#148 Starman1

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Posted 14 May 2020 - 01:52 PM

I have bought a Dioptrx to try out on my non-TV eyepieces, most of my hoard. I will try it on my APM & its Altair twin. This purchase is mainly fit trials.

 

My latest prescription was more corrected for astigmatism, and has not made as much difference as I hoped. I need to research opticians & speciality lenses more next time.   

The DioptRx does not fit the 30mm APM, but it does fit the 24mm just fine.



#149 25585

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Posted 14 May 2020 - 03:07 PM

The DioptRx does not fit the 30mm APM, but it does fit the 24mm just fine.

One of the things to try is a lens alone or homemade holder on various eyepieces, also what rubber eyecup ones can take a Dioptrx with their cups down.



#150 Starman1

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Posted 14 May 2020 - 04:25 PM

One of the things to try is a lens alone or homemade holder on various eyepieces, also what rubber eyecup ones can take a Dioptrx with their cups down.

You mean the DioptRx on top of a rubber eyecup?

I've never seen that done.




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