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