the eyepiece is magnifying a fixed location virtual image. take a look at a loupe and see how higher magnification ones have shorted focal length. the objective is focusing an image onto a fixed plane inside the body of the scope for that situation, a longer focal length gives higher magnification. the eyepiece then magnifies that fixed plane.
Herb.... ----- Original Message ----- From: "Tom C" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Wednesday, January 12, 2005 9:09 PM Subject: Re: Astrophotography (was Re: *istD EOL...) > OK, I understand the math and don't disagree, but why does a longer focal > length eyepiece (a set of glass lenses in a tube) give lower magification, > when a longer focal length camera lens (a set of glass lenses in a tube) > yields a higher magnification?
