Re: making my own telescope type magnifiers?
- From: skuke <skuke89@xxxxxxxxx>
- Date: Wed, 09 Aug 2006 06:12:31 GMT
On Tue, 08 Aug 2006 07:59:33 -0700, Eric R Snow wrote:
I've been looking to buy head worn telescope type magnifiers because
the Opti-Visor and their ilk all bug my eyes. The optometrist said
this is because of two reasons in my case. First is that they don't
correct my astigmatism and second because the spacing of the lenses
doesn't match the spacing of my eyes. The least expensive of the head
worn magnifiers I have found so far is close to $400.00 US. And there
appears to be no upper limit in price. So, I'm thinking that by using
the Edmunds book "Popular Optics" for the math and design ideas, and
buying surplus coated lenses I can make my own. Any suggestions?
Thanks,
Eric R Snow
I realize it's way out of your price range, but check out the Zeiss surgical
loupes. They use a prismatic rather than Galilean type magnifiction. This
allows for higher magnification without additional weight or length.
I had a pair of these a few years ago and shopped around quite a bit. Zeiss
seemingly defied the laws of physics as their lenses produce brighter,
larger field of view, deeper depth of view and sharp to the edges of view
more than any other loupe at any given magnification or focal length.
....even those costing more $$$ (Zeiss was about $1500 in 1999).
The ones on eBay for ~$300-500 (sold for dentistry, generally) are ok for
the money. Certainly much better than Opti-visor.
--
Skuke
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