Difference between a view through an eyepiece with barlow, and just an eyepiece. Same magnification! : r/telescopes
Telescope 80/400mm refracting Telescope Eyepiece (10mm 20mm) can be Connected to Mobile Phones Computers 5X24 Star Finder for Scientific Research and Teaching : Amazon.co.uk: Electronics & Photo
Telescope 10mm vs 20mm: Know The Key Differences Between?
Compare the Moon Through Different Eyepieces and the AstroMaster LT 70 - YouTube