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
Wes James
Carpal Tunnel
Reged: 04/12/06
Posts: 2345
|
|
Re. Collimation adjustability, I don't know about the 125's, but I have the Vixen BT-80M's, and if you peel back the black covering right under/beside the eyepiece, there are screws to tweak the prism's.
--------------------
Wes
Atlantic Beach, FL
Some bino’s from Miyauchi 5x32 Binon's up through Garrett 20x110 Signature's,
Some telescopes from a Stellarvue 80mm NHNG up through a couple of 8” reflectors…
And a wonderful 4.25" Delmarva Shiefspiegler!
Some good friends, made here on C/N.
Oh- several cats and a wonderful wife!
Anyone want a cat???? :-O
"When your work speaks for itself- Don't Interrupt" -Gamble Rogers
|
WRose
scholastic sledgehammer
Reged: 07/08/05
Posts: 914
Loc: Colorado, USA
|
|
Quote:
Can you measure your exit pupils using say the 24 Pans and see if you are getting the full aperture?
This was checked and rechecked by several people when I first got these. The answer is Yes, they are Full Aperture. There is no restriction of vignetting.
Quote:
Is there provision for collimation if necessary. I've read reviews where that was apparently a problem.
There are provisions to allign the tubes and the prisms. I've never had any particular problem with them being out of alignment. Even after long Pacific transits they've been just fine. I'm sue they could get out of alignment but it's not common on mine. I tweak them ocassionally like maybe once every 18 months.
For $4,000.00 I'd chack and make sure that includes the mount, HAL110 tripod, and heavy duty shipping case along with the 6x30 Finder Scope, etc. Also check if they have the ability for encoders and computer. Not saying it isn't as I don't know, I'd just be surprised if they're selling the same thing for $800.00 USD less after 5 years. Supposedly they stopped making them because they couldn't afford to make them at that price and people wouldn't buy them for more.
--------------------
Clear Skies, Bill
|
Anders Asp
newbie
Reged: 07/18/08
Posts: 1
|
|
Hi there all of u!
Have anyone heard or seen any new information about the new vixen 125mm binos?
I will try to get a pair shipped to Sweden where i live, i just hope the binos will be as good as vixen says... Its kind of nice to be able to pick any magnification you want, i kind of like that. I hope the colorcorrection will be good and the sharpness will be good also. I wonder what the maximum field of view is and with what ep:s to get that.
Right now i have Widescan Type III 20mm x2 and 13mm x2, the ep:s are 84deg. I hope they will work good in the new vixen binocular.
/ Anders Asp
|
Vincent33
member
Reged: 09/18/07
Posts: 95
|
|
Quote:
Have anyone heard or seen any new information about the new vixen 125mm binos?
Now they have a place in the Vixen pages:
http://www.vixenoptics.com/binoculars/bt125.html
they are the models with interchangeable eyepieces.
The f ratio is 6.08, didn't seen it mentioned before in this thread.
But the BAD news is that these huge guys JUST "collect 300% more light than the naked eye" ... RUBBISH!
;-)
|
Gordon Rayner
sage
Reged: 03/24/07
Posts: 468
|
|
RE: Interchangeable eyepieces
I had nothing but disappointment from putting wide field Tele-Vue oculars on WW II f/3.5 Busch 10 x 80, and similar, but better bad results on WW II Toko and Toyokawa Navy Arsenal (Kowa)15 x 105 , which are f/4 or f/4.5 , as I recall, in particular combined with the Fuji eyepiece for their 25 x 150 straight view.
The late Kevin Kuhne did a lot of eyepiece substitution on WW II military binoculars. There had to be an element of chance /and or compromise, though I did not view through any of his modified equipment.
In many/most/ cases, the designer balances the eyepiece errors to those of the prisms and the objectives. See Hopkins in Mil . Handbook 141, for example.
Things will be better at f/5 or longer, of course. There is an element of chance/compromise in arbitrary use of eyepieces not specifically designed for a particular combination of objective and prism. The eyepieces mentioned in this thread have not been designed for use with a particular prism glass path and index. The errors may be acceptable(?) but they must be there.
|
edwincjones
Post Laureate
Reged: 04/10/04
Posts: 4203
|
|
Quote:
How do the Vixens compare to the BT120s as far as quality, FOV, weight, etc to justify the increase in cost?
edj
--------------------
n w arkansas
Binocular, Solar, General Amateur Astronomy
|
|
8 registered and 35 anonymous users are browsing this forum.
Moderator: EdZ
Print Thread
|
Forum Permissions
You cannot start new topics
You cannot reply to topics
HTML is disabled
UBBCode is enabled
|
Thread views: 1466
|
|
|
|
|
|
|
Previous
Index
Next
Threaded
[Re: 
Edit
Reply
Quote
