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Thread: Looking for new Lens for DOb 10"

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    Default Looking for new Lens for DOb 10"



    Hi all,

    I am looking for a nice new eyepiece for my new Aperatura AD10 Dob. I want to try to go with pretty high magnification but not to the limits of the scope. Upon searching I found this Baader Planetarium Hyperion 8mm

    It says you can take it apart and have different sizes,also you can screw the top on to a camera it says. Has anyone used one of these? Also I have the Baader Q Turret 2.25x barlow lens, and it unscrews from the bottom to allow an additional 1.3x mag. Would this be compatible for it? I know my other lenses do not fit it since it is threaded long.

    I am also open to suggestions for other sizes/brands under $150 Preferable 1.25" but 2" would be ok.

    Thanks
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    Telescope Apertura AD10 10" Dob, Skywatcher Apo Refractor Equinox ED80 500mm F/6.25 Mounts Celestron Advanced VX EPs 10mm SWA 70 degree FMC, 15mm SWA 70 degree FMC, GSO 9mm Plossl, 30mm Super View 2" GSO SuperView 30mm, Sybony 4mm 62 Degree Barlows Baader 1.25" 2.25x Q Barlow HT with T adapter and spacers to make it go up to 4x+, GSO 2x Shorty Filters Orion moon 25% - Baader Neodymium Moon & Skyglow Filter, ZWO 2" IR Cut Filter Camera ZWO ASI385MC, ZWO ASI294MC Pro

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    Default Re: Looking for new Lens for DOb 10"

    I have no experience with Baadar, but I'm sure someone will reply soon who does. I'm interested to hear their recommendations and what you decide.
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    Ted LeRoy
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    Default Re: Looking for new Lens for DOb 10"

    My understanding is that the Baader Hyperions are not a good match for Dobs

    Baader Eyepiece types question
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    Default Re: Looking for new Lens for DOb 10"

    Skip the Hyperion. I would get an ES 8.8mm 82, mine works wonderfully in my AD12. I had several of the Hyperions, they worked well in the LX200 SCT, but showed serious field curvature in the fast Dob and were very soft even in the center of the field. They were all sold off to fund my first ES EPs.
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    ACF 8"SCT,
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    Default Re: Looking for new Lens for DOb 10"

    Hi !
    Quote Originally Posted by AsteroidsRock View Post
    My understanding is that the Baader Hyperions are not a good match for Dobs

    Baader Eyepiece types question
    I read this post and found this :
    Quote Originally Posted by mental4astro View Post
    The Baader Hyerion line is designed for a convex focal plane - in other words a refractor, SCT and Mak.

    These are not designed for use in a Newtonian.…
    In an f/5 Newtonian, no good - again, I've used them in a Newt.
    and that :
    Quote Originally Posted by mental4astro View Post
    … I use my 5mm Hyperion in my 8"f/4 Newtonian, and it is stonking good edge to edge! It is the only Hyperion model that actually perform this good in Newtonians.
    which seems to me quite self-contradictory.
    I use Baader Hyperion 8mm, 17mm and 31mm aspheric (coma-corrected with the MPCC from the same brand) with my dobson 10" f/5 and they are fine. Maybe my
    Quote Originally Posted by mental4astro View Post
    … eyes are compensating an enormous amount, or
    my
    Quote Originally Posted by mental4astro View Post
    … experience with eyepieces is not sufficient to identify the large amount of field curvature these eyepieces produce with Newtonians, which also varies between individual focal length models.…
    .

    The next fine-seeing night, I'll have a test with both my newton f/5 and my new refractor f/5 too
    Arsène
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    Default Re: Looking for new Lens for DOb 10"

    Thanks all and Arsene for doing that research.
    I'm gona check out that ES 8.8mm 82 too and that baader question link.

    I can't wait to see the results
    Last edited by thebutcher; 06-04-2018 at 02:46 PM.
    Telescope Apertura AD10 10" Dob, Skywatcher Apo Refractor Equinox ED80 500mm F/6.25 Mounts Celestron Advanced VX EPs 10mm SWA 70 degree FMC, 15mm SWA 70 degree FMC, GSO 9mm Plossl, 30mm Super View 2" GSO SuperView 30mm, Sybony 4mm 62 Degree Barlows Baader 1.25" 2.25x Q Barlow HT with T adapter and spacers to make it go up to 4x+, GSO 2x Shorty Filters Orion moon 25% - Baader Neodymium Moon & Skyglow Filter, ZWO 2" IR Cut Filter Camera ZWO ASI385MC, ZWO ASI294MC Pro

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    Default Re: Looking for new Lens for DOb 10"

    Check out the Meade 5000 8.8 UWA's as well. Probably comparable to the ES, a tad cheaper and 82° also. For me, ergonomically the twist up eyecups on these make them the most comfortable EP's to view through that I own, hands down.

    RE the Hyperion, I have no experience with those, but often get them and the Morpheus mixed up with each other. That's actually why I prefer Meade, over the years their naming schemes have been much less confusing. 4000 SWA's , 4000 UWA's, 3000 plossls, 4000 plossls, 4000 Super Plossls, 4000 pseudo-Masawhoosits, 5000 UWA's, 5000 XWA's, 5000 SWA's, 5000 HD whassits....

    Not.


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    Default Re: Looking for new Lens for DOb 10"

    Thanks

    With the ES 8.8mm 82 or Meade 5000 8.8 UWA could that be used with my baader Q Turret 2.25 Barlow and not max out of magnification on a clear optimal night looking at planets? Also could the end part of the Baader Q Turret barlow be screwed in to the bottom of either Eyepiece to make it 1.3X? I had trouble with my current lenses because the end of the Baader was to long and the threads could not be on.

    Also out of curiosity what should be the max magnification on a clear optimal night with not to much light polution but not dark skies? Also would I be better off getting a higher magnification EP to use by itself if so what would the target ".mm" be? I wan to be able to see Mars, Jupiter & Saturn as big as I can with good detail also use it for galaxies and such. I know Refractors are better for planets but I got the dob for all purpose use and figured it would be a good starting point. I came from a Celestron 127EQ power seeker.
    Telescope Apertura AD10 10" Dob, Skywatcher Apo Refractor Equinox ED80 500mm F/6.25 Mounts Celestron Advanced VX EPs 10mm SWA 70 degree FMC, 15mm SWA 70 degree FMC, GSO 9mm Plossl, 30mm Super View 2" GSO SuperView 30mm, Sybony 4mm 62 Degree Barlows Baader 1.25" 2.25x Q Barlow HT with T adapter and spacers to make it go up to 4x+, GSO 2x Shorty Filters Orion moon 25% - Baader Neodymium Moon & Skyglow Filter, ZWO 2" IR Cut Filter Camera ZWO ASI385MC, ZWO ASI294MC Pro

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    Default Re: Looking for new Lens for DOb 10"

    I can't comment on the 8mm Hyperion, but my experience with the longer fl ones matches the comments by mental4astro: they had a lot of edge distortion in an f5 dob.

    Regarding maximum magnification on a good night: theory says that a good scope will provide up to 50x per inch, or 500x for your scope. However theory and practice are different beasts, and it would be a rare night that you could achieve that much magnification: and your scope would have to be right at ambient temperature, which may take a couple of hours. 500x would also give you an exit pupil of 0.5mm, which is very small and you often find "floaties" in your eye will effect the viewing.

    In practice you can expect 250x to be a much better high power (ie: a 5mm eyepiece). This is at an exit pupil of 1mm, which is less susceptible to floaties. 250x will show you a lot of detail on the planets, but if you try to go much higher you will lose contrast and therefore won't necessarily see any more detail. Your dob should give you wonderful planetary images at this power.

    If you want maximum detail and contrast then a quality orthoscopic eyepiece is the way to go (like the KK Fujiyamas: Astronomy & Electronics Centre )- but they have narrow fields and you will have to push the dob more with them. They also have very small eye-relief, so they can be a problem if you wear glasses when viewing.

    Other "planetary" eyepieces, like the Long Perng planetary series (Long Eye Relief Eyepieces / Eyepieces / Telescope Accessories / Accessories / Products / Long Perng Co., Ltd. ) have 20mm eye-relief and are very nice, although not quite as sharp and contrasty as a quality ortho. They are re-badged and sold by other companies like Orion and Williams.

    All the best,

    Dean

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    Default Re: Looking for new Lens for DOb 10"

    Quote Originally Posted by DeanD View Post
    I can't comment on the 8mm Hyperion, but my experience with the longer fl ones matches the comments by mental4astro: they had a lot of edge distortion in an f5 dob.

    Regarding maximum magnification on a good night: theory says that a good scope will provide up to 50x per inch, or 500x for your scope. However theory and practice are different beasts, and it would be a rare night that you could achieve that much magnification: and your scope would have to be right at ambient temperature, which may take a couple of hours. 500x would also give you an exit pupil of 0.5mm, which is very small and you often find "floaties" in your eye will effect the viewing.

    In practice you can expect 250x to be a much better high power (ie: a 5mm eyepiece). This is at an exit pupil of 1mm, which is less susceptible to floaties. 250x will show you a lot of detail on the planets, but if you try to go much higher you will lose contrast and therefore won't necessarily see any more detail. Your dob should give you wonderful planetary images at this power.

    If you want maximum detail and contrast then a quality orthoscopic eyepiece is the way to go (like the KK Fujiyamas: Astronomy & Electronics Centre )- but they have narrow fields and you will have to push the dob more with them. They also have very small eye-relief, so they can be a problem if you wear glasses when viewing.

    Other "planetary" eyepieces, like the Long Perng planetary series (Long Eye Relief Eyepieces / Eyepieces / Telescope Accessories / Accessories / Products / Long Perng Co., Ltd. ) have 20mm eye-relief and are very nice, although not quite as sharp and contrasty as a quality ortho. They are re-badged and sold by other companies like Orion and Williams.

    All the best,

    Dean
    Very usefull info Dean and all. Thanks

    I tried my 10mm 70 swa with the Baader Qturret 2.25x and could see it great, it was just a little smaller then I would like it, I then put the 9mm with same barlow that came with my Dob, and it was bigger and still clear but had the small viewing hole on it. The night was also great for viewing with no clouds.
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