Click here if you are having trouble logging into the forums
Privacy Policy |
Please read our Terms
of Service | Signup and
Troubleshooting FAQ | Problems? PM a Red or a Green Gu.... uh, User
frisianstar
member
Reged: 01/29/06
Posts: 58
|
Re: Strange Results in Eyepiece FOV Comparisons
05/20/08 03:22 PM
|
|
|
Hi, I have a 31 nagler and and just received a Ethos 13mm.
with a laserpointer you can easy measure the FOV by pointing the laser through the eyepiece on to a board,
After some playing with the laser you will notice the edge of the field on the board, mark this edge of the fieldstop (of the eyepiece) ON the board,
slide the laser to the opposite of the fiedstop and mark it also.
Measure the distance between the eyepiece focal point and the board.
Measure also the distance between the markings.
With basic mathematics (and a calculator with tangent) I calculate for the 31 Nagler (first measure): 84 degree
(second measure): 83 degree.
For the Ethos (first measure): 99.96 degree
(second measure): 100.2 degree
Simply a 31 Nagler HAS a 82 degree field, and a Ethos HAS a 100 degree field. 
Holland from the Netherlands
|
|
10 registered and 11 anonymous users are browsing this forum.
Moderator: Greg K., Jason B, csa/montana
|
Forum Permissions
You cannot start new topics
You cannot reply to topics
HTML is disabled
UBBCode is enabled
|
Rating:
Thread views: 1810
|
|
|
|
|
|
|
Previous
Index
Next
Flat
Edit
Reply
Quote
