Perhaps you are interested in buying a telescope for yourself, but have no idea what the different names mean. Newtonian reflector telescope, Galileo reflector telescope – what does it all mean? Well, if you are interested in learning what a Newtonian reflector telescope is, you will find out here.
Newtonian Reflector Telescope
Newtonian reflector telescopes are some of the most popular, and for good reason. The Newtonian reflector telescope is a type of telescope that was invented by the British scientist Sir Isaac Newton using a parabolic primary mirror and a flat diagonal secondary mirror.
There are many advantages that are offered by this type of telescope compared to other types. For one, these telescopes are usually less expensive for any given aperture than comparably quality telescopes of other types.
Since light does not pass through the objective, exotic glasses are not needed, the material only needs to be able to hold an accurate figure.
Another advantage to these telescopes is that since the objective on these telescopes only has one surface that needs to be figured, overall fabrication is far simpler than other telescope designs. A short focal ratio can be more easily obtained, which results in leading to a wider field of view.
However just as there are advantages to the Newtonian reflector telescope there are also certain disadvantages that you will want to be aware of. For one, Newtonians suffer from coma, an off-axis aberration which causes imagery to flare inward and towards the optical axis.
Take Your Time
You will obviously want to weigh out both the advantages and disadvantages, in order to determine whether this or another type of telescope is going to be the best for you. The time and effort that you put into this will be well worth it, because you will be able to spend your money most wisely and know that you are getting a telescope that you will be able to use and enjoy.
Especially because a Newtonian reflector telescope can be so expensive, this is certainly not a purchase that you want to rush into.
Some retailers offering telescopes will allow you to check the models out firsthand before agreeing to buy, so that you can get an idea of what they offer and how to use them. This will be the best idea because then you can get information and instructions firsthand, making it easier to remember when you get home and are trying to use it on your own.