How much does a good telescope cost? It depends on your definition of ‘good’. For a beginner, a 70mm Dobsonian is perfect for their observation needs. For a more advanced amateur astronomer, a pricey 200mm telescope with a motorised EQ mount is what they’d consider good.
The price of a telescope depends greatly on two things: the optics and the mount. Let’s discuss how each of these affects the price.
The most important optical aspect is aperture size. This is the diameter of the light-collecting lens at the front of the telescope.
A larger aperture collects more light, thus allowing you to see objects in clearer detail and look at celestial objects deeper in the sky.
Beginner telescopes have an aperture of 70mm or 2.8”. This is the minimum recommended aperture size if you want to get decent views of the sky. With the right eyepiece, you should be able to observe the moon and planets and even some galaxies and nebulae.
You can find plenty of 70mm telescopes for under £100. They are great for kids, beginners and anyone looking for an affordable telescope with decent optical quality.