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Magnification question

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Magnification question

Postby esa20 on Sat Jan 10, 2009 8:36 am

I'm looking through my telescope with the 30x erecting eyepiece. When I look through the telescope during the day, I can see that it magnifies things. However when I look at night, I'm not sure if I'm getting the right amount of magnification. When I look at the moon, I can see it more clearly, but not at enough detail to really see anything special. When looking at planets, the don't appear to be magnified at all. In other words it looks just like it does to the naked eye. Is this what I should expect from this telescope? Do I need a different eyepiece? I tried the barlow lens but could never get it focused. It's bushnell model 789669.
esa20
 
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Postby Jne_K on Mon Jan 12, 2009 8:12 am

Hi

30x is 30x, regardless of day or night. However, 30x is minimal for use in astronomy. Use the other eyepieces that came with the sciope or, better yet, upgrade with better quality and more powerful eyepieces.

Since telescope eyepieces are the most important accessory for any telescope, you may also wish to do more reading with my article, Ten Top Telescope Eyepiece Questions

For the basics on how to setup and use your telescope, see our article
Telescope FAQs
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So if I am understanding you correctly

Postby esa20 on Mon Jan 12, 2009 11:16 am

The 30x would really be more useful for locating objects in the sky, but a more powerful eyepiece would be better for observation. The 4mm that came with the scope would probably be a little too much magnification, because with a 700m focal length, that would work out to about 175X. Therefore I shouldn't get anything with a focal length of less than about 4.7mm.

I know atmospheric conditions make it hard to speak in absolutes, but what would be the lowest useful magnification for viewing objects, other than the moon?
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Postby Jne_K on Mon Jan 12, 2009 11:24 am

Hi

I can't define useful, here, as I commonly use a binocular at 10x to view some types of lunar detail. Just a matter of how much and what type of detail you are trying to see. I would certainly recommend starting at 75x and working your way up if you were not satisfied with 30x. I would not exceed about 150x (5mm or 6mm) in that scope as a max and that may be pushing it, even for the moon.
Thanks for posting with us
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