Message:

<p>[QUOTE=&quot;Valentinian, post: 2273911, member: 44316&quot;]By the way, many magnifiers labeled &quot;x5&quot; are really just &quot;x2&quot;. The manufacturers lie on the box. The magnifier really changes the <b>linear</b> size by a factor of about two (more or less so an 18 mm diameter coin looks as a 36 mm diameter coin would at that distance). They can argue they change the <b>area</b> by a factor of four but that is not how labeling is supposed to be done. </p><p><br /></p><p>If you have two rulers, here is one way to tell. Put them parallel to each other so that you can look through the magnifier at one and see the other off to the side. Compare the visual distance of one centimeter through the glass to the corresponding length on the other ruler. (For high power, this is not so easy to do, but it is for most &quot;x5&quot; glasses which are really x2.) My two-power glass makes one centimeter take up the visual space of two. Two-power. </p><p><br /></p><p>I find my two-power glass works well for most purposes and appreciating the coin. With more power than that and you will often see scratches and pits that look bad under magnification but do not detract from the usual view by eye. You will want higher power for cleaning and questions of authenticity. </p><p><br /></p><p>I have an eight-power jeweler&#039;s loupe which you stick close to your eye and have the coin at its end, only two inches from the eye. I just checked it with one ruler through the glass in focus and with a second ruler at normal focal length and, low and behold, one centimeter through the loupe corresponds to eight on the second ruler, as it should.[/QUOTE]</p><p><br /></p>

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in