* Astronomy

Members Login
Post Info TOPIC: Parfocal Rings


L

Posts: 131433
Date:
Parfocal Rings
Permalink  
 


A small tip to make some of your different branded eyepieces parfocal, is to manufactures some spacer rings by either gluing together a long strip of paper, or gluing strips of thin plastic that overlap or are laminated. These rings can then be slipped over the silver barrel of the eyepiece.
The width of the spacers can be roughly judged by raising the eyepiece from the eyepiece holder.

A slightly less attractive way is to use a jubilee clip (or similar).

But, commercial Parfocal Rings are available.

The advantage is that once the eyepieces are parfocalised then little or no refocusing adjustments are required when changing the eyepieces.



__________________
Page 1 of 1  sorted by
 
Quick Reply

Please log in to post quick replies.



Create your own FREE Forum
Report Abuse
Powered by ActiveBoard