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Thread: very easy astronomy question

  1. #1 very easy astronomy question 
    Forum Professor captaincaveman's Avatar
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    On behalf of my wife, just wondered what a barlow lense is, is it actually another lense in conjuction with the viewing lense or is it just a spacer for the viewing lense

    Neither of us have seen one and assume its another lense

    Any astronomers out there who know?

    Thanks in advance :-D


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    It is an extra lens that attaches twixt the eyepiecs and scope. It usually has a magnification factot of 1.5 to 3. So if your scope is set at mag=120 a times 2 barlow will make it 240. ok?


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    Forum Professor captaincaveman's Avatar
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    Quote Originally Posted by Megabrain
    It is an extra lens that attaches twixt the eyepiecs and scope. It usually has a magnification factot of 1.5 to 3. So if your scope is set at mag=120 a times 2 barlow will make it 240. ok?


    Thanks megabrain, i haven't seen one yet so wasn't sure what to expect but every astronomer ive spoken to says you gotta get one

    Thanks again
    CAPTAINCAVEMAN


    I ANSWER TO NO-ONE - The wonders of athiesm

    that which does not kill us only postpones the inevitable
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