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" 3mm-8mm Planetary Zoom Eyepiece.
Takahashi EMC LE 7.5mm eyepiece.
BST Starguider ED 8mm eyepiece.
I bought the SVBony 3-8mm zoom from seamless_solutions (4948) In ebay:
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Bill Paolini's review of the SVBony SV215 1.25" 3mm-8mm Planetary Zoom Eyepiece here:
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Ernest Maratovitch bench test of the SVBony 3-8mm zoom, both the pre-production (middle of the page) and final product (after middle of the page) here ( translated from Russian using Google translate):
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