Comparison
The National Geographic Explorer 114mm is the winner for most amateur astronomers. While both scopes match on beginner accessibility and planetary observation, the Explorer's larger 114mm aperture delivers significantly better deep sky performance, capturing 33% more light than the AstroMaster's 70mm optics. This aperture advantage is the single most important differentiator; it translates directly to brighter views of nebulae, galaxies, and star clusters that justify the scope's superiority across nearly every category except price.
The AstroMaster 70AZ suits observers prioritizing portability and planetary observation in a compact package, offering decent optics within serious space constraints. The National Geographic Explorer 114mm belongs with anyone serious about viewing faint deep sky objects without breaking their budget; the larger aperture fundamentally transforms what you can observe while remaining lighter and cheaper than the competition. For beginners, the Explorer pulls ahead because larger aperture helps overcome the learning curve of telescope use; more photons reaching your eye means easier focusing and brighter targets.
Choose the Explorer unless your observing site has severe space limitations or your interests lie exclusively in lunar and planetary work.
Why choose Celestron AstroMaster 70AZ
Why choose National Geographic Explorer