40x-400x Inverted Microscope Aperture_3. 130mm - 165mm while adjustable interpupillary distance allows

while adjustable interpupillary distance allows for a customized fit for any user

Additional features include twist-up eyecups for eyeglass-friendly viewing

Explore the wonders of the night sky with the National Geographic StarApp70 — a 70mm refractor telescope that combines classic optical performance with cutting-edge app integration for a dynamic

Its wide 114mm aperture and fast f/4

5") aperture

40x-400x Inverted Microscope Aperture_3. 130mm - 165mm while adjustable interpupillary distance allowsThe National Geographic 40x400x Inverted Microscope offers a fresh and innovative way to explore the microscopic world. Unlike traditional upright microscopes, this model places its optics below the stage, making it easier to view living organisms in liquid environments without disrupting them. This design also helps protect the objective lenses and simplifies sample switching during experiments. With a magnification range of 40x to 400x using three