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  1. #1
    PennywiseChao's Avatar
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    Default 2x barlow question



    Hey guys, I had a question. I got myself the 1.25" eyepiece and filter kit from Celestron. It comes with a 6mm, 8mm, 13mm, 17mm, and 32mm, as well as a 2x barlow. So, in my genius, I've said "Man, forget the 2x barlow, 3 & 4 mm will probably be too maginified for my Meade DS-114 anyway. And 17 is about 2x 32, 8 is about 2x 17. But I think I may be a fool. The 17mm eyepiece has a way bigger lens for light to be pulled through. So, if I use my 2x barlow, will I get the comfort of veiwing through a larger lens with the power of a smaller one? Is that why this thing would be useful? It kind of just dawned on my laying in bed last night, and it's been cloudy here for 2 weeks. It might be clear tonight, so I might get to try for myself. But is that a correct assumption?

  2. #2
    andyp180's Avatar
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    Default

    yes,you will have the better eye relief offered by
    using a lower power with a barlow.that is important
    to some people.however,extra glass in the light train
    can dim the views slightly,but again,to some,this is not
    really an issue for them.
    good quality ep's and barlow will tend to lessen the effect.
    clear skies,

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    andy

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    revelation 20X80 bino's,camlink tp-2500 camera/bino tripod.
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  4. #3
    Bob327's Avatar
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    Default

    You bet that "big Glass " in the 17 mm will be a lot easier to look thru with a Barlow then an eyepiece used by itself that gave you the same magnification.... No ands No iffs and No butts....

    What Andy noted about the slightly dimmer view is true BUT I guess you have to have 20 - 5 vision to be able to see any difference ...

    I'm willing to bet that 99.5 percent of us on these forums who have owned a scope over a year or so have made good use of Barlows at some time or another... cheap way to effectively double the number of eyepieces you have in your case...

    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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    andyp180 (12-17-2011),PennywiseChao (12-17-2011)

  6. #4
    PennywiseChao's Avatar
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    Default

    Thanks a lot guys! Bob, you're really helping me out on here today~!

 

 

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