[Ronja] US Source for an ~130mm Glass Bi-Convex Lens

Karel Kulhavy clock at twibright.com
Mon Jul 16 17:10:42 BST 2007

On Fri, Jul 13, 2007 at 02:01:50PM -0400, Eric Carson wrote:
> Noticing that there were no listed sources for the US, and considering that
> this would have solved my "Last Mile" problem while deployed to Afghanistan,
> here is the fruits of my search.
> Oriental Trading Company
> Item# * IN-59/1016
> *URL: 
> http://www.orientaltrading.com:80/bpentry?BP=7727&sku=59/1016<http://www.orientaltrading.com/bpentry?BP=7727&sku=59/1016>
> Price: ~8 USD per, ~7 USD per when buying 3 or more.
> It is a folding magnifying assembly, yet the lens can be easily extracted.

Thanks, added to the source list http://ronja.twibright.com/get/lens.php

> On a different note, Has anyone experimented with the Fresnel Lens?  They
> are generally cheaper and lighter, but could suffer from bad resolution and
> possibly UV damage?

Yes we have. Calculations from experimental data suggest that with a Fresnel
lens, the range could be increased to 3.0km.


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