The specified astronomical instrument refers to a 10-inch (250mm) aperture reflecting telescope utilizing a collapsible truss-tube design. This construction facilitates portability without sacrificing substantial light-gathering ability, crucial for observing faint celestial objects. This design addresses the need for a telescope with significant aperture that is also manageable for transportation and storage.
Instruments of this type are valued for offering a balance between aperture size, portability, and cost-effectiveness. The larger aperture allows for the observation of fainter objects, revealing greater detail in nebulae, galaxies, and star clusters compared to smaller telescopes. The collapsible tube design simplifies transportation to darker observing sites, minimizing light pollution’s impact on viewing quality. Historically, Newtonian reflectors have been a popular choice for amateur astronomers due to their relative simplicity and high performance for their price.