How to make a small easy telescope
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have you ever observed some exoplanet transits maybe by doing photometry or something similar? oh i forgot to introduce myself I`m a 15 year old student from southtirol in the northern italy and i am in the astronomy team of the school and maybe we will have the opportunity to go to a congress about exoplanet transits next year but my english is not so good yet i hope that I will learn some astronomical-words until that moment. yours is my favorite youtube channel:)
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@epicfantasy Now I see...you are using a light source from infinity, which makes the image form at the focus. :D Great video
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nice video! of course i don't need to make one cause i have the Skyliner 8 inch by skywatcher. But watching this video is very educational!
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i have the same siszzzorrzzzzz
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When you slide the smaller tube in and out, doesn't that affect the focal length? Don't both focal length of the lenses have to meet?
madebo1294 3 weeks ago
@madebo1294 YEs, the sliding allows you to find the focus. Only way to see clearly.
epicfantasy 3 weeks ago
will a double convex objective and a plano concave eyepiece work?
withoutthefire 3 weeks ago
@withoutthefire Yes, I believe so. That sounds like the combination that Galileo used.
epicfantasy 3 weeks ago
For your method of finding the focal length, doesn't that just find the distance from the lens to the image? Don't you take that length and put it into the thin lens equation?
Icklumpus 3 weeks ago
@Icklumpus great comment. But, isn't that the focal length? and to use the thin lens formula to get the magnification and focal length you need both radii of the lenses. difficult to figure unless given to you. Great comment though.
epicfantasy 3 weeks ago