In making this video I have used these optical instruments:
Skywatcher ED80 Pro Series Apochromatic Refractor Telescope Gold Version.
Dobsonian mount for Skywatcher Flextube 130P.
SVBONY SV215 1.25" 3mm8mm Planetary Zoom Eyepiece.
Takahashi EMC LE 7.5mm eyepiece.
BST Starguider ED 8mm eyepiece.

I bought the SVBony 38mm zoom from seamless_solutions (4948) In ebay:

https://www.ebay.co.uk/itm/1857179927...

Bill Paolini's review of the SVBony SV215 1.25" 3mm8mm Planetary Zoom Eyepiece here:

https://theskysearchers.com/viewtopic...

Ernest Maratovitch bench test of the SVBony 38mm zoom, both the preproduction (middle of the page) and final product (after middle of the page) here ( translated from Russian using Google translate):

https://astrotalksru.translate.goo...