Astro Tutorial #1.9: Telescopes, Eyepieces & Magnification

Hey folks,

this video will be all about eyepieces and magnification.
We will cover different topics:

* the underlying principles of eyepieces
* the light paths inside eyepieces
* the magnification
* limits of the magnification
* different types of eyepieces

In the end you hopefully will be able to get a first grip on this topic and decide whether an eyepiece is suitable for your telescope or not.

I hope you like the vid, please feel free to leave comments below.

Clear skies everyone!
Greetings
Chris

Hashtags:
#telescope
#eyepiece
#magnification

[eurodoc]

Are there any performance differences between a 2" and 1.5" diameter eyepiece?

[ethanjogola]

ONLY 600 views??? Wth this is an amazing video!! Well done, this series is helping me out a lot getting into astronomy.

[antoniofirenze]

You explained to me all there is on eyepieces. I'm going to rock the Physics presentation tomorrow!!

[relativethoughts]

This is exactly what I am looking for, thank you.

[jimlahey]

Wow your videos are great. Best ones I can find regarding telescope basics.

[waynerichardson]

Another good video explaining the fundamentals well

[busheybushdawg]

Wow very good video - thanks for posting :)

[lwkett]

once again, a fantastic video. (i'm making comments, because your videos deserve more views than you get)

[logically]

Man..that was brilliant...excellent explanation...
Thanks a ton...you cleared lots of doubts no one else could...
Thanks bro..
I was very much confused with how our eye sees objects and how lense see with that focal length issue and all..you cleared out..
But i wish if you could elaborate that how all the lines\light rays are coming from and where they are focused and how our vision system work with all these things..

[SuperBuickregal]

Thank you again Chris, I look 👀 forward for the next video. How about some of your images done with music 🎼 like the moon 🌝 video along with some interesting 🧐 point about it. Thanks again Tom

[satvikvarun]

✴️ *_PLEASE REPLY!_*
Should I buy a telescope of *70mm* aperture with *Ramsden* eyepieces(20mm, 12mm&4mm) OR

*60mm* telescope with *1.25" Meade MA* eyepieces? eyepieces(26mm&9mm)? ....

Both scopes have 2x barlow
One has better arpeture & other has better eyepiece :(

I mainly wanna view planets and some nebulas if possible

[typhoonnamikaze]

" *two dot five* millimeter eyepiece" what a great way to read a decimal.

[satvikvarun]

*Please Reply*
How are the H20mm and SR4mm in *"0.9inch"* ? Are they good. Do they have too much abberations? Do they provide bad images? What's the disadvantage of using 0.9"?
*_Plese Reply in detail thanks_*

[photonmaster]

Dear Chris . Does a focal reducer work with reflector telescopes. I have read alot about their use with Cassegrain and reftactors but nothing about newtonian reflectors. N.B focal length of my newtonian is 650mm with f/5. Thanks again for the best videos on youtube . Keep it going

[DharmveersinhJadeja]

How to calculate telescope field of view ? explain me detail

[jadejamanoharsinhi]

Sir are
celestron powerseeker 127eq is good telescope?

[sreekanthramesh]

How about a 68 degree field of view, 25-30 mm eyepiece? Will it give good result for a 150/750 mm telescope?

[davidbrandenburg]

when you look through a eyepiece and you see a star like pattern or faceting on the outer edge of the visible lens, can this be caused by them being out of collimation?. if so can you point me some where that can explain how to collimate these cheap focusers on my refractors? my meade 90mm ds90 and my 70mm celestron powerseeker are the only 2 telescopes I have this problem on. these same eyepieces work just fine on my newton and my 70mm wide field, with no ring or faceting visible!.

[shedactivist]

Great tutorial, just what I was looking for, but it does leave me with a question. The eyepieces are designed to 'straighten' the light so the lens in your eye can do the final focusing. Cool, but how do I get different magnifications onto a camera sensor, which will not have a final lens attached. will eyepieces still work? A video on that subject would be brilliant. Great channel, subscribed with bell.

[Mandragara]

Would a 4.7mm eyepiece with a 1200mm focal length scope be appropriate, or overmagnified? This is about 255x