Comparison
The 150EQ Newtonian wins overall, though the choice depends on your priorities and physical capability. The single most important differentiator is aperture; the 150EQ's 150mm mirror versus the AstroMaster's 102mm translates to substantially better light gathering, translating to superior deep sky and astrophotography performance. This advantage justifies the modest $27 price premium and accounts for the 150EQ's six-point higher overall score.
The AstroMaster 102AZ suits observers who prioritize portability and ease of setup, with its refractor design requiring minimal maintenance and its lighter weight enabling spontaneous observing sessions. The 150EQ Newtonian better serves those committed to serious observation and astrophotography, willing to sacrifice convenience for genuine optical capability and the equatorial mount's tracking advantages for long-exposure imaging. Buy the Celestron AstroMaster 102AZ if you value convenience and transportability above optical performance.
Buy the 150EQ Newtonian if you're serious about observing and willing to invest in proper equipment and setup time. The 150EQ represents better value for amateur astronomers with realistic expectations about commitment level. However, honestly assess whether you'll actually use a heavier telescope; an accessible 102mm beats an unused 150mm.
Why choose Celestron AstroMaster 102AZ
Why choose Telescope, 150EQ Newtonian