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Limiting magnitude for Celestron Skymaster 15x70 ?

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#1 Night Surfer

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Posted 07 May 2005 - 09:32 PM

No tripod but lawnchair w/ arms...fairly steady.
Not completely dark skies but fair. Would rate 7 out of 10.
Thx,
-NS-

#2 SaberScorpX

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Posted 08 May 2005 - 01:34 AM

Hi NS-

Lotta variables to consider.
A pure guess with the info provided? Somewhere around 9th mag.
I suggest checking out the 'LINKS to Web - Binocular and Astro Info' and other links pinned to the top of this forum for info and starcharts to help estimate a bino's limiting magnitude.
Mounted binos can net you an extra magnitude or two, depending on sky conditions.

Saber

Ready to tackle the Herschel 400?
http://www.geocities...rpx/SGH400.html

#3 Guest_**DONOTDELETE**_*

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Posted 08 May 2005 - 06:03 AM

NS, take at look at the "Best of" section of this forum. There you will find, among other topics, information regarding what one can see with various bins. For your particular bins, and with 5.8 visual LM, it has be reported that you ought to be able to see as far as 10.8.

#4 EdZ

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Posted 08 May 2005 - 06:33 AM

Go to page three in this forum and open the thread on Limiting Magnitude in binoculars where you will find a chart to help you determine yours. Or read the complete article published in the CN Reports.

15x70, even skymasters a non FMC 15x70, can show you as deep as mag 10.5 if your skies are as dark as mag 5 to 5.5, the binoculars are absolutely still and you spend several minutes looking for each faint star with averted vision. Under the best possible conditions in mag 6 skies and mounted you would be lucky to reach mag 11.

A braced 15x70 not on a steady mount is probably not seeing any deeper than mag 9.5 even in the best skies.

edz


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