Testing 7 Barlow Lenses For Astronomical Telescopes

In making this video I have used these optical instruments :
Skywatcher ED80 Pro Series Apochromatic Refractor Telescope.
Dobsonian mount for Skywatcher 130P.
Moonlite 2"to 1.25" adapter.
Skywatcher 2X Barlow lens.
Meade 3x Telenegative Barlow lens.
Celestron 2X Barlow lens.
Baader 2.25X Barlow lens.
Meade 5X TeleExtender Barlow lens.
Celestron Ultima Series SV 2X Barlow lens.
Moonfish 2" ED 2X Barlow lens.
SVBony Aspheric 23mm 62 degrees eyepiece.
Huawei P30 Pro mobile phone camera.