Dobsonian telescopes are popular among amateur astronomers for their simplicity, affordability, and large aperture. They are named after their inventor, John Dobson, who introduced the design in the 1960s. Dobsonian telescopes are known for their easy-to-use altazimuth mount and their large light-gathering mirrors, which make them great for observing deep-sky objects like galaxies, nebulae, and star clusters.

When purchasing a Dobsonian telescope in India, consider factors such as the aperture size (which determines the amount of light the telescope collects), the focal length (which affects the magnification), and the overall build quality. It's also important to check for additional accessories like eyepieces, finderscopes, and collimation tools that may be included with the telescope. Remember to read reviews, compare prices, and consider your observing preferences and budget before making a final decision.