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    Sunnycharlie's Avatar
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    Default Baader hyperion zoom and barlow lens.



    Having had a quiet summer with not much opportunity to view, I am now enjoying the darker evenings and starting to get back into the habit of checking to see whether it is cloudy or not. Unfortunately, mostly cloudy at the moment....My husband is also starting to ask what I would like for Christmas....I've been eyeing up the baader hyperion zoom for a good long while and this Christmas might be the time to go for it!
    My question is, if I wanted to add a barlow to the zoom,which one would I go for- without going over £100? I don't own a barlow yet and mostly use the 2 lenses that came with my orion xt8i- 10mm and 25mm. Just occasionally, I feel I would like to up the magnification and a barlow might do the trick. So which barlow would be a good choice? Or is a barlow just going to make the whole thing too big- zoom lens plus barlow- to be practical?

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    ibase's Avatar
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    Hi, the Televue 2x barlow is a good one to go with the Hyperion zoom which barlows very well, and it's right at the budget mentioned; its performance/review and reputation are excellent. Here it is with the zoom:



    The combo is kinda big, but there's another out-of-the-box option, that is, to get a fixed Hyperion 21mm (which will nicely complement the zoom's small apparent field of view [AFOV] at 20mm to 68-degrees for the Hyp21) and use the nosepiece with the zoom to get the equivalent of the TV 2x barlow. See more details/pics here (post #93):

    Hello, from a Hyperion zoom lover!

    Best,

    Hernando
    Last edited by ibase; 10-05-2010 at 01:02 PM.

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    Sunnycharlie (10-05-2010)

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    That looks very interesting. Obviously, if I go for the zoom and the hyperion 21mm, I don't have a barlow to use with other lenses. However, I presume the Baader Hyperion zoom would be superior to my bundled Orion 10mm and 25mm lenses anyway?

    Is it obvious what you have to do to disassemble the modular bits and then reassemble to make the 4-12mm zoom? Perhaps that question should wait until I have bough them and have them in front of me!!

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    Quote Originally Posted by Sunnycharlie View Post
    That looks very interesting. Obviously, if I go for the zoom and the hyperion 21mm, I don't have a barlow to use with other lenses. However, I presume the Baader Hyperion zoom would be superior to my bundled Orion 10mm and 25mm lenses anyway?

    Is it obvious what you have to do to disassemble the modular bits and then reassemble to make the 4-12mm zoom? Perhaps that question should wait until I have bough them and have them in front of me!!
    Sorry for the late reply, been away for some time and and now just beginning to catch up in the forum. Yes, you are right, the Hyperion zoom/21mm combo will not allow barlowing other eyepieces (EP's), but yes, the Hyperion zoom will be much better than the stock EP's that came with the scope, in terms of providing sharper, more contrasty, brighter views and also the field of view is much wider (50's degrees for the plossls vs. around 70-ish for the Hyperion zoom) and the difference will be quite apparent upon first trying out the BH zoom after being used to the stock EP's (at least that was my experience).

    If the zoom has already been set up in its 2" mode (default is 1-1/4", it works on both sizes), all you have to do is to unscrew the nosepiece of the Hyperion 21mm and screw it on to the filter thread of the 2" barrel of the zoom, simple enough, there's nothing to it really.

    Best,

    Hernando
    Last edited by ibase; 10-26-2010 at 11:14 AM.

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    Thankyou for your informative reply!
    So, you have the 21mm nosepiece screwed into the zoom lens to effectively barlow it, does that mean you then couldn't add a filter as well? When viewing the moon I usually add a moon filter so as not to be too blinded. I'm just rying to work out the pros and cons as it's a very expensive purchase...

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    No problem on using the Moon filter because the 21mm nosepiece does have its own filter thread too where the Moon filter can be screwed in.

    Best,

    Hernando

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    The Hyperion zoom now as a dedicated Barlow 2.25x for the zoom ep

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    The Hyperion Click-Stop gives you 24mm - 8mm
    used with a 2x Barlow gives 12mm - 4mm...a dedicated 5mm might be a better addition.
    If you have dark skies where you live, the click-zoom is a nice eyepiece & is great if you have Go-To (centering on stars for alignment)...on an 8inch Newt / Dob it can get a bit 'grainy' when zooming in on DSO's if you have light pollution

 

 

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