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
EdZ
Professor EdZ
Reged: 02/15/02
Posts: 12600
Loc: Cumberland, R I , USA42N71.4W
|
Re: New 125mm binoculars from Vixen
06/25/08 03:44 PM
|
|
|
These would be the Vixen 125 that I saw at NEAF. They were displayed at NEAF with what is supposed to be a fixed power 30x eyepiece. At that time I called the Vixen rep over to the display and I pointed out that the exit pupil SHOULD be 4.2mm. I showed him that the exit pupil was 3.8mm. The cause of thee reduction was not clearly apparent, but he agreed the reduced exit pupil was apparent.
Causes could be several:
..perhaps the eyepieces were not a focal length that produced 30x but they were giveing 33x.
..there may have been baffels intruding into the light cone path before the light reached the prisms
..the prism aperture could be sized such that the entire light cone cannot pass.
Either one or more of the above is reducing the exit pupil on this big binocular.
edz
--------------------
Teach a kid something today. The feeling you'll get is one of life's greatest rewards.
member#21
|
|
6 registered and 15 anonymous users are browsing this forum.
Moderator: EdZ
|
Forum Permissions
You cannot start new topics
You cannot reply to topics
HTML is disabled
UBBCode is enabled
|
Rating:
Thread views: 1607
|
|
|
|
|
|
|
Previous
Index
Next
Flat
Edit
Reply
Quote
