I have a Weaver scope with one of these - how does it work? The SCOPE says Weaver k2.5, the screw on BOOSTER has marks like 5-10-15-20

Person I got it from thinks that is the 'new' magnification, but that can't be right, can it? It is basically a lens in a screw-on housing, so those are just focusing adjustments, like on a standard scope AO, right?

Any idea as to history of the thing? It is pretty neat!


Psalm 19:14-May these words of my mouth and this meditation of my heart be pleasing in your sight, Lord, my Rock and my Redeemer.
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Humble servant of Jesus Christ. Living His plan and praying to show it in name, word, body, and light.