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-optics/simulator/ Trevor talking about the Celestron HD11 - https://www.youtube.com/watch?v=PUOW3cusrK0 Copyright: https://creativecommons.org/licenses/ https://creativecommons.org/licenses/by-sa/4.0/deed.en https://creativecommons.org/licenses/by-sa/3.0/deed.en https://creativecommons.org/licenses/by/2.0/deed.en Hashtags: #barlow #reducer #telescope #barlow_lens #focal_reducer #barlowlens #focalreducer #FOV