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Red dot starfinder
on 7 December 2014
I bought this to replace a sight on a telescope whick had a similar fitting to an 11mm rail. The astro versions are twice the price but I suspect that they have a different optical window as this has a slightly mirrored lens which reflect starlight making it difficult to see through. It still works tnough and I managed to locate the andromeda galaxy with it. Quite well built, all metal construction and easy to operate but better suited for a pistol.