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  1. #1
    carnevali's Avatar
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    Default 4mm Radian or Orion Megaview?



    I'm looking into buying a 4 mm EP to fit between my 3.5 and 5 mm eyepieces, since magnification changes fast with small differences in EP focal lengths at the low end. I like the Orion Megaview on paper but wonder whether the Radian might be better, in spite of the smaller field of view (higher contrast, flatter field, brighter, lighter weight, etc.). Has anyone used either or both EP? What's your impression? Thanks, Tonino.

  2. #2
    Bob327's Avatar
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    What scope will you be using....

    I'm primarily a SCT user so I honestly have no need for extremely low focal length eyepieces... BUT my GUT says Radian only because Tele Vue has "this thing" for not selling anything but very good eyepieces.. Unfortunately they also have this thing for being more expensive then I'd like...LOL

    Bob G

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  4. #3
    carnevali's Avatar
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    I have been able to use both the 5 mm (178x) and the 3.5 mm (254x) on my 4.5" refractor f 7.7), so the 4 mm should fill in the magnification gap nicely, since 254x is pushing it a bit. The 4 mm would give me 222x, and I should be able to use that some nights.
    Tonino.

  5. #4
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    Default

    The TV Radian is a great EP and I have a few of them. The FOV is 60 degrees and there is a cool 20mm of eye relief. Not to mention the well known Televue quality.
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  7. #5
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    The Orion Megaview has an attractive 82 degree AFOV, with 12 mm relief (which is OK). But it could have other shortcomings, whereas the TV quality seems so widely accepted (I like my 5 mm Nagler a lot, for instance). That's why I'm not sure.
    Tonino.

  8. #6
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    Hey everyone, this is my first post on here even though I've been doing a lot of research on these forums. Sorry to bump an old thread, but I haven't been able to find many reviews or information on the Orion Megaview eyepieces anywhere, except for the two reviews on Orion's site. I'm looking into getting a 4mm eyepiece, which will be the most powerful eyepiece in my collection. I'm using an Orion XT10, so at 1200mm focal length it would be 300x magnification. I don't plan on going any further than that. Basically I have narrowed my choices down to either a 4mm TV Radian or a 4mm Orion Megaview, since I haven't found many other options in 4mm eyepieces. I already own a 5mm Orion Stratus and I'm getting crystal clear views of Saturn and the moon, so I figured I can push the magnification a little further, but 3.5mm seems like it would be too much at 343x magnification. I know the Radians have a good general reputation but I have read that some people aren't too fond of the "Instadjust" feature, which makes me a little weary about purchasing one. I was hoping that some people have acquired the Megaview eyepieces since this thread was posted over a year ago and could provide some feedback, particularly when compared to a Radian.

    Thanks,
    Blake

  9. #7
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    BTS83:
    My main question is just how many times you "think" you will be able to use any 4 mm eyepiece in your scope under your skies... I ask because 300x for me here in Maryland required a very good night to be able to use... On the few nights that I can get up to 300x I will just barlow a lower powered eyepiece (8 mm in your case)...

    Before I purchased any 4 mm I'd make darn sure that I could use it more then a half dozen times a year...if I could not I;d be looking at an 8 mm eyepeice to buy along with a barlow...

    No Opinion on the Megaviews...never used them The Radians are very good...but I sold my Radians and switched to Pentax mainly for the better color and slightly wider FOV

    Bob G.
    CPC1100 housed in a slotted domed observatory (Exploradome) 4 and 5 inch refractors for use from the lawn, a 8" Sct (NS 8i) for star parties...
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  11. #8
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    Default

    Thanks for the response Bob. I already have an Orion Shorty Barlow (2x) that I'm not too impressed with. I mainly only use it to collimate my primary mirror with a laser. I have 7.5mm Plossl that I've tried in it, and wasn't too happy with the results. I think I would use the 4mm on a regular basis, mostly for moon and planetary viewing. I use my 5mm all the time. I have pretty good skies here in central PA, with a good bit of light pollution coming from Harrisburg, which is about 30 miles from me, and a small amount of light pollution coming from Carlisle, which is about 3 miles from me. I'll probably hold off on buying a higher power eyepiece for a while, I have some higher priority purchases planned, a higher quality Barlow might be one of them. I guess the Megaviews aren't too popular considering I can't find hardly any reviews on them...

  12. #9
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    My observations have been that there's a lot of hype about magnification and sometimes, as Bob327 has said, how much will you really use it. In the end, it's your money, spend it how you want. Buy a Telvue Barlow, you'll be happier.
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  13. #10
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    BTS83:

    I get up to Carlisle several times a year (I'm into cars and Carlisle is just a huge attraction to those of us in the car hobby) ...BUT from my limited experience (not actually using a telescope the amount of light pollution is pretty sad ....

    Anyway... I'm not a lunatic (lunar observer) and not that big on Planets so I tend to us my lowered powered eyepieces much much as I am into DSO's...

    On the barlow...I;m kind of surprised that you find the Orion Shorty not quite that good... I;ve owned a good dozen different 2x barlows over the years and to be honest I could not see much difference in any of them ...I will admit that I do carry a Televue in my traveling eyepiece case that I use with my 4 and 5 inch refractors that I use at outreach events and local star parties but I only kept it because it has that green lettering on it...snob appeal maybe lol ??? I usually observe from my Observatory with my CPC1100 and I run Denkmeier S1 Power switch diagonal in my SCTS which has both a focal reducer and a 2x barlow built into it and I use the focal reducer 10 times more then I do the Barlow...BUT as I said I'm into DSO's which need low magnification...

    Clear Skies...

    Bob G.
    CPC1100 housed in a slotted domed observatory (Exploradome) 4 and 5 inch refractors for use from the lawn, a 8" Sct (NS 8i) for star parties...
    I Hate the winter so I use heated Motorcycle clothing to stay warm while observing in winter
    Retired, also have 2 other hobbies
    1. tinker with older Corvettes (6 in garage)
    2. make a heck of a lot of sawdust in my wood shop.

 

 

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