Meade Mini 114 User Manual - Page 25

Calculating Magnification

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Calculating Magnification The power of a telescope is how much it magnifies objects. Each telescope has its own set of focal lengths and, therefore, different magnifications when used with various eyepieces. For example, the LightBridge Mini 130mm used with the 26mm eyepiece magnifies an object 25 times. The 9mm eyepiece used with the LightBridge Mini 130mm will magnify objects 72 times. You can calculate how much magnification an eyepiece will have with your specific telescope. Just divide the telescope focal length by the focal length of the eyepiece. Focal Length of the Telescope Eyepiece's magnification x 2 ÷ Focal LengthMof thI e NEyepI iece5 = Magnification with a 2X Barlow lens = Magnification If you MusI eN aI B5arlow lens with one of your eyepieces, it Look at the specifications. For example, you will see doubles the magnification of your eyepiece. Other types that the focal length of the LightBridge Mini 130mm of Barlows can triple or further increase the power of an is 650mm. Let's say that you have obtained a 6.3mm eyepiece. To find out how much your magnification is when Ieyepiece. You can tell what the focal length of your you use a 2x Barlow, multiply your eyepiece's magnification eyepiece is as it is always printed on the side of the by two. For example, the 9mm low-power eyepiece used eyepiece. Divide: 650mm ÷ 6.3mm, which equals with the LightBridge Mini 130mm magnifies an object 72 103.17. Round this off to the nearest whole number and times. Multiply 72 by 2 and you get 144 times magnification you find the 6.3mm eyepiece used with the LightBridge with a Barlow. Mini 130mm magnifiesLoorebmjeipscumtsdo1lo0r s3it amtiemt, ceonsse.ctetuer Lorem ipsum dolor sit amet, consectetuer Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Nam nibh. Nunc varius facili- adipiscing elit. Nam nibh. Nunc varius facili- adipiscing elit. Nam nibh. Nunc varius facili- Expert's Tip sis eros. Sed erat. In in velit quis arcu ornare sis eros. Sed erat. In in velit quis arcu ornare sis eros. Sed erat. In in velit quis arcu ornare laoreet. Curabitur adipiscing luctus massa. laoreet. Curabitur adipiscing luctus massa. laoreet. Curabitur adipiscing luctus massa. It's worth repeating: KeepInitnegemr uitnpduruths aactauaguberciogmhmto, dcolceoamr-, buInttesgmerautllpeurruismacaagugeueiscommmoordeo cionmte- resInttiengger utthpaunrusaaclaaurgguee cro, mdmimodmo ceomr,-fuzzy one. Using too high a power eyepiecmeoidso. oNunnec noecfmthi eeu jmustostetmcpoormcomnseoc-n mmoisdot.aNkuencsnemc madi eeu jubsyto nteemwporacosntsreoc-nommodeor.sN.unSc onecdmoineu'tjutshtointekmptohracotnhseicg- her magnification is necessarily better-quitatenettueoe. rC.frEtaetsianemlittvlhietcaeteunbs,isbel.ibsInetndvdiguinemiswsai,maidslaipcwuissciiutnthg ataenltotuewe. rC.erEatrsiaemmlitvalietgcatenunsi,ifsbilc.ibInaendtdiigounmnissavi,maadllaiupcueissc!iuntg tetuer. Etiam vitae nisl. In dignissim lacus ut ante. Cras elit lectus, bibendum a, adipiscing 23 vitae, commodo et, dui. vitae, commodo et, dui. vitae, commodo et, dui. Ut tincidunt tortor. Donec nonummy, enim in lacinia pulvinar, velit tellus scelerisque augue, ac posuere libero urna eget neque. Ut tincidunt tortor. Donec nonummy, enim in lacinia pulvinar, velit tellus scelerisque augue, ac posuere libero urna eget neque. Ut tincidunt tortor. Donec nonummy, enim in lacinia pulvinar, velit tellus scelerisque augue, ac posuere libero urna eget neque.

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Lorem ipsum dolor sit amet, consectetuer
adipiscing elit. Nam nibh. Nunc varius facili-
sis eros. Sed erat. In in velit quis arcu ornare
laoreet. Curabitur adipiscing luctus massa.
Integer ut purus ac augue commodo com-
modo. Nunc nec mi eu justo tempor consec-
tetuer. Etiam vitae nisl. In dignissim lacus ut
ante. Cras elit lectus, bibendum a, adipiscing
vitae, commodo et, dui.
Ut tincidunt tortor. Donec nonummy, enim
in lacinia pulvinar, velit tellus scelerisque
augue, ac posuere libero urna eget neque.
Lorem ipsum dolor sit amet, consectetuer
adipiscing elit. Nam nibh. Nunc varius facili-
sis eros. Sed erat. In in velit quis arcu ornare
laoreet. Curabitur adipiscing luctus massa.
Integer ut purus ac augue commodo com-
modo. Nunc nec mi eu justo tempor consec-
tetuer. Etiam vitae nisl. In dignissim lacus ut
ante. Cras elit lectus, bibendum a, adipiscing
vitae, commodo et, dui.
Ut tincidunt tortor. Donec nonummy, enim
in lacinia pulvinar, velit tellus scelerisque
augue, ac posuere libero urna eget neque.
Lorem ipsum dolor sit amet, consectetuer
adipiscing elit. Nam nibh. Nunc varius facili-
sis eros. Sed erat. In in velit quis arcu ornare
laoreet. Curabitur adipiscing luctus massa.
Integer ut purus ac augue commodo com-
modo. Nunc nec mi eu justo tempor consec-
tetuer. Etiam vitae nisl. In dignissim lacus ut
ante. Cras elit lectus, bibendum a, adipiscing
vitae, commodo et, dui.
Ut tincidunt tortor. Donec nonummy, enim
in lacinia pulvinar, velit tellus scelerisque
augue, ac posuere libero urna eget neque.
Calculating Magnification
The power of a telescope is how much it magnifies objects. Each telescope has its own set of focal lengths and, therefore,
different magnifications when used with various eyepieces. For example, the LightBridge Mini 130mm used with the 26mm
eyepiece magnifies an object 25 times. The 9mm eyepiece used with the LightBridge Mini 130mm will magnify objects
72 times. You can calculate how much magnification an eyepiece will have with your specific telescope. Just divide the
telescope focal length by the focal length of the eyepiece.
I
Focal Length of the Telescope
÷
Focal Length of the Eyepiece
= Magnification
Look at the specifications. For example, you will see
that the focal length of the LightBridge Mini 130mm
is 650mm. Let’s say that you have obtained a 6.3mm
eyepiece. You can tell what the focal length of your
eyepiece is as it is always printed on the side of the
eyepiece. Divide: 650mm ÷ 6.3mm, which equals
103.17. Round this off to the nearest whole number and
you find the 6.3mm eyepiece used with the LightBridge
Mini 130mm magnifies objects 103 times.
Eyepiece’s magnification
x
2
= Magnification with a 2X Barlow lens
If you use a Barlow lens with one of your eyepieces, it
doubles the magnification of your eyepiece. Other types
of Barlows can triple or further increase the power of an
eyepiece. To find out how much your magnification is when
you use a 2x Barlow, multiply your eyepiece’s magnification
by two. For example, the 9mm low-power eyepiece used
with the LightBridge Mini 130mm magnifies an object 72
times. Multiply 72 by 2 and you get 144 times magnification
with a Barlow.
It’s worth repeating: Keep in mind that a bright, clear, but smaller image is more interesting than a larger, dimmer, fuzzy one. Using
too high a power eyepiece is one of the most common mistakes made by new astronomers. So don’t think that higher magnification
is necessarily better—quite often the best view is with a lower magnification value!
Expert’s Tip
23