Celestron NexStar 4SE Telescope

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dipernad

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I recently purchased a NexStar 4SE Telescope, its max power is 240x. What lens would i need for 240x power?
 
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bobw

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Magnification is the focal length of the primary mirror divided by the focal length of the eyepiece.<br /><br />The focal length of the primary is 1325 mm and the eyepiece that came with it ( according to this website ) is 25 mm so if you divide 1325 by 25 you get 53 power.<br /><br />In order to get 240X you divide 1325 mm by 240 which gives you the focal length of the eyepiece = 5.5 mm. <div class="Discussion_UserSignature"> </div>
 
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bobw

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I am glad it helped. Welcome to uplink. <div class="Discussion_UserSignature"> </div>
 
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