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A question regarding magnification of a binocular.

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A question regarding magnification of a binocular.

Postby alex.flory on Sun Jan 28, 2007 7:34 am

Hi all, first time here on this forum. I have a quick question if anyone here can help me. I have a Sakura binocular that has a magnification power of 60x90. Does that mean it has a 60 magnification and a 90mm diameter objective lens? I unscrewed the objective lens and it only measure around 70mm. Compared the objective lens with my photography macro and its only around 4x as my macro is +4 magnification. Is the magnification power spec different or something is not right here?

Also, if the binocular has a magnification power of 7x, does it mean that the objective lens has a magnification of 7x or the whole system has a magnification of 7x and if the latter is the case, what then is the magnification power of the objective lens alone?

Thanks in advance for answering.
alex.flory
 

Postby Guest on Sun Jan 28, 2007 9:32 am

7x is th magnification of the whole system


Your Sakura is something like
http://cgi.ebay.com.au/SAKURA-COMPACT-R ... dZViewItem


We don't take those kind of binoculars very seriously.

Would help to know what you are looking for. Start with a 8x40 porro if you don't know. Forget the Sakuras. And stop disassembling your bins.

Good luck.
Guest
 

Postby opticsplanet.com on Mon Jan 29, 2007 9:34 am

Hi

For the basics on binoculars, see our article at
How to Understand Binoculars, http://www.opticsplanet.com/how-to-buy-binoculars.html
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Postby alex.flory on Mon Jan 29, 2007 10:07 am

Hi,

thanks for the replies. So if i want to know what is the magnification power of the objective lens, how do i find out? thanks.
alex.flory
 

Postby opticsplanet.com on Mon Jan 29, 2007 10:19 am

Hi

Magnification is a function of the eyepiece, not the objective lens. The objective by itself in a binocular has no magnification. You can get a wide variety of magnifications with any one objective by changing the eyepiece.
----------------------
Your personal optics expert
Joanie (Jne) K
http://www.OpticsPlanet.com
Phone: (888) 263-0356
Fax: (847) 574-6820
opticsplanet.com
Site Admin
 
Posts: 4044
Joined: Tue Sep 23, 2003 11:18 am
Location: Prospect Heighs, IL