Astro Tutorial #1.15: Barlow Lens and Focal Reducer

Hey folks,
in this video we will cover two additional lenses we mentioned here and there in previous videos: Barlow lenses and (focal) reducer.
We will go though
- the light paths and behind the scene theory
- effects on our optical setup including the use with eyepieces and cameras
- changes and calculations in / for "magnification" and the "FOV"
- practical applications for beginners
- optical limits
- ... much more.

I hope you find this video useful. And as always I say: Clear skies everyone and till next time here on catchingphotons!
-Chris

Links:
Optical simulator I used within this video:
- https://ricktu288.github.io/ray-optic...
Trevor talking about the Celestron HD11
-    • Building a Telescope Rig to PHOTOGRAP...  

Copyright:
https://creativecommons.org/licenses/
https://creativecommons.org/licenses/...
https://creativecommons.org/licenses/...
https://creativecommons.org/licenses/...

Hashtags:
#barlow
#reducer
#telescope
#barlow_lens
#focal_reducer
#barlowlens
#focalreducer
#FOV