giftcc.blogg.se

Some tabletop Dobsonians are also available. Unless you have very specific reasons why you’d want a refractor, go with something else. This is why you will mostly see refractors only in the 60mm-110mm range.

Because of the design of the lenses, the price of refractors scales exponentially, so they get very expensive really fast. Our recommendation is to quickly discard refractor telescopes of this size, and not for quality reasons, because they look great, but because this is the range where they start to get really expensive. You will find refractors, Newtonians, Cassegrain, and even a few tabletop Dobsonians. This aperture range is where you have the greatest number of options when it comes to selecting from different types of telescopes. 130mm equal to 5.11 inches, but as we mentioned earlier, some brands make 127mm telescopes that are exactly 5 inches too. The “mm” means millimeters because most manufacturers use the metric system. This is the most important piece of a telescope because it’s the lens that is going to capture the light. The aperture is the diameter of the front lens or mirror. The number you see in a telescope’s name refers to its aperture. In terms of performance, they are pretty much the same so we are going to group them together. The small difference comes because US manufacturers use the round number of 5 inch in their telescopes which translates to 127mm, while European and Asian manufacturers using the metric system make them 130mm to use a round number.

So we have decided to make a guide on what can you expect from a device in this aperture range.įor practical reasons we are also going to consider 127mm telescopes in this range as they are pretty much the same. All the technical specifications and numbers can get overwhelming and it seems hard to really know what you are going to get when you decide to purchase one.ġ30mm telescopes are some of the most popular models because they are in that sweet spot between high power and reasonable pricing. Telescopes come in many different apertures, focal lengths, and designs.