Re: [APML]: Binocular Vixen 12X80

["Tom Krajci" <krajcit@det5wg57.barksdale.af.mil>]

> From:          "giovanni casano" <casano@docline.it>

> Another problem is my binocular Vixen 12X80.
> Me being myopic I don't succeed without glasses to put to focus the
> binoculars.
> How to do?

You may have to inspect the focus mechanism, but maybe you can do a 
modification to allow the binoc's to focus for you without glasses.

Big question:  Do you have astigmatism?  If so how much?  If it's 
more than about .25 or .5 diopter then you will never have very sharp 
images with your glasses off. . .in that case you may want to 
consider contact lenses.  When I want razor sharp vision I use the 
uncomfortable, semi-rigid, gas permeable type.  (I can tell the soft, 
comfortable contact lenses don't give me as sharp vision.)

Since you are myopic (I am too and have fought this problem) you 
would have to modify the focuser to move the eyepieces closer to the 
objective lens.  It may only take 1-2 millimeters to make the 
difference you need.  It depends on - your mechanical skills and if 
you are willing to risk voiding the warranty on the telescope.

Maybe the objective lenses can be shifted closer at the other end of 
the tubes?  (IT would have the same effect)  But be careful. . 
.collimation could be thrown off and you'd have to spend time 
readjusting that.

Hope this helps.

Tom Krajci

Capt Tom Krajci
B-52 Intelligence Officer
"In God we trust, all others we monitor!"
http://spur.barksdale.af.mil