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Thread: Fine tuning rings and hyperion zoom?

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    Default Fine tuning rings and hyperion zoom?



    Is it possible to use the hyperion FTR's with the zoom piece to get even more focal length options?

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    Default

    Bumping this 'cause I want to know too.
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    Default

    I asked this question to ibase on cloudynights


    'Afraid not; I have both tuning rings and they can only be used with my Hyperion 21mm, (or other Hyperions except the 24mm), and not with the zoom. But you can swap parts between the zoom and the 21mm, wherein the zoom becomes a 4-12mm while the 21mm becomes a 32mm widefield. Just remove the nosepiece of the 21 and put in front of the zoom's smythe lens. The 21 without the nosepiece becomes a 32mm.'

    Hope this helps
    Last edited by B0B; 11-13-2009 at 11:13 AM.

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    Default

    Thanks very much for the info. I actually stumbled on the thread that you are talking about.

    Care to comment on the views you get from all of this swapping?
    Last edited by tvman; 11-13-2009 at 06:42 PM.

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    Maybe for the about same cost one would be better off going with the 8,13 and 21mm lenses and FTR's instead of the 21mm and the zoom. You will have better actual FOV but sacrifice the convenience of the zoom. Hmm....

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    I had the 17mm and 8mm but then i got the zoom and have since sold the 17mm and the 8mm will go if i get a buyer, so i haven't had the 21mm to swap about.

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    How would you compare the views between the zoom and regular hyperion eyepieces? Do things appear just as sharp with the zoom?

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    Unfortunately since i got the zoom ep i have only been out once, and that night had some of the worst dew i've seen, we got a couple of hours viewing before we we all soaked, it looked as good to me threw the zoom compaired with the fixed ep's, with the only problem being hard to focus at the 24mm.

    Taken from that nights viewing when Stevie borrowed it for his 12" lightbridge

    'I borrowed Darrin's Hyperion Zoom eyepiece for a while, and it performed really well, it is a great boon to be able to alter the magnification without having to constantly swap eyepieces, and the Hyperion gave outstanding views of some familiar objects. My only gripe with the eyepiece was that I could not get a good focus at 24mm, but apparently this has been reported by many people who have used it. There were no problems from 21mm to 8mm.'

    clear skies

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    I'm just not sure which way to go, zoom or eyepieces. Yes i have also read that the 24mm setting is definitely the weak part of that zoom.

    I have a 10" SW Dob and i'm hoping that the 8mm would be plenty of zoom, i guess it is possible to barlow the zoom as well but i'm not sure how that would affect viewing.

    One other thing is that i wear glasses and i think the eye relief on the zoom is less than the reg. eyepieces so that is something else i have to consider. Thanks again.

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    I was reading a review at cloudynights about the hyperion's and am a bit concerned about this comment as i have a 10" Dob with an f/5 ratio. What does he mean by "collapsing in a heap" and is this something to be concerned about.

    "Like many less expensive widefields, they tend to be most impressive at longer focal lengths. In f/10 SCTs, they are cool, but begin to huff and puff at f/6 and threaten to collapse in a heap in a faster-than-f/5 ‘scope".

 

 
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