Hi guys,
I am new to astronomy and there seem to be some problem with my Celestron 15x70 I just bought from Amazon. After i adjust the interpupillary distance, images from the bino are still duplicated. They are sharp but seperated by considerable distance, abt one sixth of the whole Fov. What problem can it be? Is there any other adjustment I can make? I suspect it is off collimated but not very sure. If so, what can I do now? Really appreciate your help.
Thank you,
Minh
Off collimation Skymaster 15x70 bino?
Re: Off collimation Skymaster 15x70 bino?
Hi congminhc1. Welcome to Singastro. Take a look at this thread:
viewtopic.php?f=3&t=10029
Wait for the bino veterans here to give you their take on this issue before you try any collimation on your own if you are not familiar with the procedure. Not sure if that will void the warranty.
viewtopic.php?f=3&t=10029
Wait for the bino veterans here to give you their take on this issue before you try any collimation on your own if you are not familiar with the procedure. Not sure if that will void the warranty.
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It is how many people, less fortunate than you, got to look through it."
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email: gary[at]astro.sg
twitter: @astrosg
"The importance of a telescope is not how big it is, how well made it is.
It is how many people, less fortunate than you, got to look through it."
-- John Dobson.
-
congminhc1
- Posts: 4
- Joined: Tue Jun 21, 2011 8:44 pm
Re: Off collimation Skymaster 15x70 bino?
Thank you for your support. I just realize that Science center doesn't offer warranty for items bought from Amazon. Guess I have to do the collimation stuff 
Re: Off collimation Skymaster 15x70 bino?
It's possible to fix.
I had a pair that was way off. You need to remove the rubber around the middle (where the prizm is). Then you find two screws. ONLY adjust one side of the binos so you don't screw up both sides - this isn't ideal, but it does keep things from getting worse.
Then check at night on a far away light - something brighter than a star, like a light on top of a tall building. keep making small adjustments until everything comes together as one image.
Try NOT to remove much rubber, the more you leave on the better. To repair the removed rubber, get a rubber based glue that will never harden - in case you need to remove it again.
The Skymaster is a very high performance binocular, so it's worth fixing. And don't look a gift horse in the mouth - a premium pair of 15x70s will cost 5x as much.
I had a pair that was way off. You need to remove the rubber around the middle (where the prizm is). Then you find two screws. ONLY adjust one side of the binos so you don't screw up both sides - this isn't ideal, but it does keep things from getting worse.
Then check at night on a far away light - something brighter than a star, like a light on top of a tall building. keep making small adjustments until everything comes together as one image.
Try NOT to remove much rubber, the more you leave on the better. To repair the removed rubber, get a rubber based glue that will never harden - in case you need to remove it again.
The Skymaster is a very high performance binocular, so it's worth fixing. And don't look a gift horse in the mouth - a premium pair of 15x70s will cost 5x as much.