How to Use Telescopes : Telescope Eyepieces

Telescopes can feature different eyepieces that change magnification and viewing options during telescope use. Learn different eyepieces for telescope viewing from an observatory director in this free astronomy video.

Expert: Rocky Alvey & Billy Teets
Bio: Rocky Alvey is the assistant director of the Vanderbilt Dyer Observatory and has been involved in astronomy since 1969.
Filmmaker: Dimitri LaBarge


Dhaval Malte says:

Even I have the same telescope, still trying to understand how to use it.

Big Johnson says:

Why is the camera so far away….. wtf

windinhishair10 says:

@natethegreat821 so you can use your scope to see it up close lol

mase ofspades says:

So when you, thanks mate

Jules. Verne. says:

@shantikiran1000 This is Astro-Photographer Jules V. shantikiran1000 you will NEVER get 360x, The maximum your Telescope will ever get is 60x per inch of Aperture or your 50mm. Achromatic Objective is 2inches(50mm.) 2inchesx 60x=120x ultimate Maximum Magnification NOT 360x!!

monkeyboy4746 says:

@Vijster1 They are used with refractors to allow a “right-side up” image for terrestrial viewing.

daringwrinchester says:

by solar im guessing the sun? well you can use solar filters that are placed in the front of the telescopes. Dont ONLY get a solar eypiece, get the filter that fits infront of your telescope.

tisseladden123 says:

Nice vid

Cheap Boy's Air Rifles says:

9 people don’t have a telescope

Ivan Bok says:

@chuananrock, edu-science telescopes are no more than just toys that advertise based on magnification and not aperture. I used to have one when I was 9. Apparently, the image quality is bad and the tripod caused the stars to move away as soon as you center it.

alexander hernandez says:

my came with a 4mm

rocket9244 says:

DAMN Ads!!!

fordpwrXR8 says:

@SuperGKproductions get a star map….just look for Jupiter …you can not miss it!!

samweirdo says:

I’m pretty sure this guy is a future me.

Haley Read says:

Found a telescope in my barn from when I was 9 and just put it together… can’t see anything? Yes I followed the directions… yes I took the lens cap off… and yes I am blonde… someone please tell my why it is that I can’t see jack out of it?! No moon tonight and stoked to use it!

shantikiran1000 says:

hey i have a 360×50 mm telescope.. how to use it to see the solar objects? plz help…

Vibol Lee says:

one of the things i learned today!
(length of the focal length of the telescope) ÷ ( length of the focal length of the eyepiece) = magnification!!!!

Nighthawke70 says:

I can see his eyepieces are Celestrons. I own a six pack of their brand including a set of filters in a metal case. Very nice and an excellent investment. Often times you’ll run into cheap eyepieces with most telescope outfits outside of the thousand dollar range reflectors or large SCT’s

Vijster1 says:

thanks for the stuff about the barlow lens, but what about the thing that is called the erecting eyepice????

gregohks says:

@jellepieters ahahhha

Zenziba says:

wtf u gonna do with 55mm?

MrBoBoTom says:

Hi. What about people who wear glasses? I have very poor eye sight without my spectacles on. Do any contraptions exist that allow me to wear my glasses while viewing an eye piece?

Omar Ontiveros says:

That was a great no nonsense explanation. Thank you

jmpt19 says:

Hey buddy, why is the 4mm eyepiece objective so small?

AlienHunter-FBI says:

I have a question before I go shopping can anybody help ? I bought a
Celestron Astromaster 130EQ-MD
Optical Design:  Reflector
Aperture: 130 mm (5.12 in)
Focal Length: 650 mm (25.59 in)
Focal Ratio: 5
Eyepiece 1: 20 mm (0.79 in)
Magnification 1: 33 x
Eyepiece 2: 10 mm (0.39 in)
Magnification 2: 65 x
Mount: CG-3 Equatorial
Motor Drive: Included
Optical Coatings: Aluminum
Finderscope: Built-on StarPointer
Weight: 24 lb (10.89 kg)
Tube Attachment : Dovetail Bar
Tripod: 1.25″ steel tube legs
CD ROM: The Sky L1
Highest Useful Magnification: 307 x
Limiting Stellar Magnitude: 13.1
Resolution (Rayleigh): 1.07 arcsec
Resolution (Dawes): 0.89 arcsec
Light Gathering Power: 345 x
Angular Field of View: 1.5 °
Linear Field of View (@1000 yds) : 79 ft (24.08 m)
Optical Tube Length: 24 in (609.6 mm)
it means no a lot to me lol this information, but what would I need to look at the moon in more detail ? also to see Saturn if possible ? do I need an eyepiece or something else ? cheers

The1skinsfan says:

What would be the purpose of lowering you’re magnification, also are there any smaller lenses aviable than the one that came with my telescope.

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