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  1. #11
    roverich's Avatar
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    They are the only place i will buy from ...Great people and great service ..They havent updated the used section yet as they are revamping there page ...If you do call them , ask to speak to joe as he is the one that knows a lot about scopes and mounts ....
    16in Night sky Dobsonian F4.5 , 90mm refractor 500mm FL , 7in LX200 classic Big-mac , Meade eye pieces with a few odd balls thrown in ...
    If you cant stand behind the american soldier ,
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  2. #12
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    Hey Tim!

    A hearty welcome to AF to ya. You'll find some of the greatest AA's anywhere on this Forum. So, welcome aboard and Clear Skies!



    Bob
    6 inch F/5 GEM mounted reflector

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    >)))))*>

  3. #13
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    Howdy, Wook, welcome.

    I'm just about to send a 120ST back to Orion. Mine had a drop of oil on it which seeped into the tube. I question the collimation, as well. Don't get me wrong, it's not a bad scope, I just got a lemon. There has been some discussion as to the effective aperture in light of the fact that some seem to have either a baffle or the drawtube end protruding into the light path. Mine seemed to be one, but I am not sure about it.

    Now, I am considering the AstroView 100mm f6, brother to the 120ST. Same focal length, so same power, but with perhaps a darker background view--better for contrast, I hope. Plus it's lighter in weight, so it may well fit my purposes better, actually. Both scopes are, of course, designed for lower power, wide-field ("rich-field") views which contain a large true field of view. That, combined with 2" accessories and eyepieces with large apparent fields of view will prove to be a stunning sight.

    I have also read that, as far as aberrations go for fast lenses, it is easier to get it right with a smaller diameter and/or a longer focal ratio. Chromatic aberration also plays a part. At the same focal length, increasing only the aperture increases the size of the circle of unfocused light as compared to the airy disc of stars. Decreasing the aperture will have the effect of diminishing the that circle. Since the airy disc will be the same in either case the effect will be that the chromatic aberration will not be as noticeable in the scope of smaller aperture--remember that we are comparing two scopes of the same focal length. It's something to consider. The 10mm also has an adjustable lens cell, just in case it ever needs collimating.

    You must excuse me for my bias at this point, but it is purely due to my own plan for myself as to what I'm trying to do with my astronomy right now. Many owners of the 120ST are very happy. I have read many wonderful reports. FYI, Orion, Celestron, and Skywatcher appear to all be made by Synta, so everyone tells me. They are of reasonable quality for their price and will provide years of service.

  4. #14
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    Thanks for sharing your input Russl, though, sorry to hear about your bad experience with your ST120. I hope Orion does a fast and easy exchange for you. I will continue to have it on my list as I too have been reading up on some very positive reviews of it. Hope to make the decision soon and be out stargazing shortly =)

  5. #15
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    Me too, Wook. I have two other scopes I can use, but really look forward to a bit more aperture in a refractor. I have become addicted to refractors lately. And rich-field viewing. It is difficult to find a refractor at f6 and below that won't break the bank. I think the Orion offerings are a great buy for the price. There is one more which I have considered--the Celestron Wide View 102, listed as a spotting scope (as is my Wide View 80 that I call my ST80--same thing). It is f5 (500mm focal length) and achromatic as well. It is no longer listed on the Celestron site, however, and neither is the 80mm. But, it is available on Optics Planet, I have seen, for around $200. And it only weighs 5 lbs. In the future I may want something different, dunno, like a small apo in the 80mm range. But the cost is so much more. One thing to remember is that below mag 5, or so, chromatic aberration isn't a problem. So, an achromatic lens is fine for DSOs, clusters, etc. Of course, with a short focal length, power is limited. My ST80 cannot compete with my 8" SCT for close-up views of planets and the moon, but then, my main interest is in rich-field viewing. LOL, it might as well be, since there's so much light pollution in my area.

    Good luck in your own search, pal. Let us know what you end up with.

 

 
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