When deciding between the Nexstar 6SE and an 8″ Dobsonian telescope for a second telescope, there are several factors to consider, each catering to different preferences and needs.
Portability and Setup: The Nexstar 6SE is a Schmidt-Cassegrain telescope mounted on a GoTo alt-azimuth mount, which makes it more compact and easier to transport than the 8″ Dobsonian. Its automated tracking system simplifies finding and following celestial objects, which is particularly beneficial for those who prefer a more guided observing experience. In contrast, the 8″ Dobsonian, although more cumbersome due to its size and weight, offers a simple setup that does not involve complex electronics.
Optical Performance: Both telescopes offer excellent light-gathering capabilities, though the 8″ Dobsonian typically provides a larger aperture, allowing it to collect more light than the 6SE. This advantage makes the Dobsonian better suited for deep-sky observation, enabling you to see fainter objects with greater detail.
Cost and Maintenance: Dobsonian telescopes are generally more affordable than their counterparts, especially when considering the increase in aperture size per dollar. They have minimal maintenance requirements due to their simple design. The Nexstar 6SE, however, might incur additional costs for power supplies and involves more maintenance of its electronic components.
Experience Level and Observation Goals: If you enjoy manually navigating the night sky and would like to learn more about the mechanics of telescopes, the Dobsonian is a rewarding choice. It is excellent for those with a strong interest in deep-sky observation. On the other hand, if you prefer a more automated and user-friendly experience with potential for astrophotography (though limited), the Nexstar 6SE might be more suitable.
In summary, both the Nexstar 6SE and the 8″ Dobsonian could be excellent second telescopes depending on your priorities. If portability, automation, and ease of use are top priorities, opt for the Nexstar 6SE. However, if you prefer a simpler, more affordable option with stronger emphasis on optical performance for deep-sky objects, the 8″ Dobsonian is an excellent choice.