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Thread: 2x Barlow FOV Question

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    Default 2x Barlow FOV Question



    Attaching a 2x barlow to a 42mm 65 degree eyepiece, will give me a 21mm eyepiece. What will be the fov of the 21mm? Will it be 65 degrees or 32.5 degrees?

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    Default Re: 2x Barlow FOV Question

    The AFOV will remain unchanged, meaning the magnification is doubled while the field is halved.
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