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What's The Best Loop For Detecting Coin Errors & Varieties (Magnification & Lighting)?

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SomeGoodCents's Avatar
United States
238 Posts
 Posted 03/21/2023  10:15 am Show Profile   Bookmark this topic Add SomeGoodCents to your friends list Get a Link to this Message Number of Subscribers
Newbie on journey to learn more and hopefully find a few in the wild. Before I purchase a better loop what's recommended by the pro's. Any help you could lend would be greatly apricated.
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John1's Avatar
United States
56855 Posts
 Posted 03/21/2023  10:24 am  Show Profile   Bookmark this reply Add John1 to your friends list Get a Link to this Reply
Hastings triplet,10x or 12x no more than 14x. A doublet works also if you are on a budget.
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ijn1944's Avatar
United States
19275 Posts
 Posted 03/21/2023  10:56 am  Show Profile   Bookmark this reply Add ijn1944 to your friends list Get a Link to this Reply
It's a personal thing. I avoid loupes because--to me--they have a restricted field of view and too much edge distortion, unless the viewing angle is perfectly vertical. I use a folding ~5x linen tester for general proposes (Google search 'linen testers'), and a ~10x old school microscope eye piece tube (lens at each end, viewed in an inverted fashion). I have a 40x old school drafting microscope for closer-in viewing--rarely use it. To me it's pointless viewing coins under ultra high magnification--every coin viewed would have 'flaws'.
Edited by ijn1944
03/21/2023 10:56 am
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MisterT's Avatar
United States
2004 Posts
 Posted 03/21/2023  11:16 am  Show Profile   Bookmark this reply Add MisterT to your friends list Get a Link to this Reply
I use a Bausch & Lomb triplet (5X 10X 20X) . For general viewing I use just the 5x lens. For identifying errors, rpm's, and doubling I use the 10X or sometimes I can stack all three lenses if necessary.
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