[Elecraft] OT - Magnifier lamp

[Palmer C Byrne]

The designations for the Optivisor are as follows:

 

Each unit comes with one lens. Other interchangeable lenses are available.
In this table, Pwr = magnification power and FL = focal length. 

. No . . Power. . FL 
. .2 . . 1.50 . . 20" 
. .3 . . 1.75 . . 14" 
. .4 . . 2.00 . . 10" 
. .5 . . 2.50 . . .8" 
. .7 . . 2.75 . . .6" 
. 10 . . 3.50 . . .4" 

I have the 3 & 5. I use the 3 for most work.

 

Palmer Byrne  W7NMD

 

 

  _____  

From: Wayne Conrad [via Elecraft]
[mailto:ml-node+6598915-1674192955-157814 at n2.nabble.com] 
Sent: Tuesday, July 19, 2011 9:13 AM
To: pcbyrne
Subject: Re: OT - Magnifier lamp

 

I'm with those who prefer head-mounted magnification.  I built my K2 
while wearing an Optivisor: 

     http://www.doneganoptical.com/optivisor.php

It looks as though it would be uncomfortable, but looks are deceiving.   
It is light and the head band is broad and soft.  I wore it for most of 
the three weeks I took to build my K2 with no discomfort. 

Magnification factor: Beats me, but the lenses are marked with a "5"*.   
I doubt that means 5x.  Perhaps it means 5 diopter.  Mine also has a 
loupe that swings down over one lens to add an additional 2.5x.  I only 
used the loupe to read the writing on the smallest capacitors.  Here's 
the loupe: 

<snip>