As a rule of thumb, your telescope should have at least 2.8 inches (70 mm) aperture — and preferably more. Dobsonian telescopes, which are reflectors with a simple mount, provide lots of aperture at relatively low cost. A larger aperture lets you see fainter objects and finer detail than a smaller one can.
What telescope focal length is best for astrophotography?
Most experienced astrophotographers find that a good 4 or 5 inch apochromatic refractor is an excellent choice for deep-sky astrophotography because of its versatility. Such a scope can keep you busy for a long time and last a lifetime. For beginners, a small 65mm, 70mm or 80mm refractor is an excellent choice.
Why is a refractor better than a reflector?
Because of their compactness and ligthness, refractor telescopes do not collect as much light as reflector but have a more stable optical quality and do not need any adjustement from the user/observer.Aug 7, 2018
Which is better reflective or refractive telescope?
If you are interested in astrophotography, purchasing a refractor is a better option because of it's specialized optic design that captures deep space objectsdeep space objectsA deep-sky object (DSO) is any astronomical object that is not an individual star or Solar System object (such as Sun, Moon, planet, comet, etc.).https://en.wikipedia.org › wiki › Deep-sky_objectDeep-sky object - Wikipedia like galaxies and nebulae. If you are interested in brighter celestial objects like the Moon or planets or a beginner, a reflector telescopereflector telescopeA reflecting telescope (also called a reflector) is a telescope that uses a single or a combination of curved mirrors that reflect light and form an image. ... Although reflecting telescopes produce other types of optical aberrations, it is a design that allows for very large diameter objectives.https://en.wikipedia.org › wiki › Reflecting_telescopeReflecting telescope - Wikipedia is ideal.
Which is better Newtonian reflector or refractor?
If nebulas and galaxies are your main interest, a Newtonian reflector or Schmidt-Cassegrain is the way to go. Moving up to a 90mm or 100mm refractor will snare more objects and provide better performance, for a higher price.
What telescope do you need to see galaxies?
If you want to observe galaxies — and I mean really get something out of the time you put in at the eyepiece — you have to use a telescope with an aperture of 8 inches or more.Feb 22, 2019
What magnification do you need to see galaxies?
In practice, the optimum magnification for most objects is somewhere between about 8× and 40× per inch of aperture — toward the low end for most deep-sky objects (star clusters, nebulae, and galaxies) and the high end for the Moon and planets.
Can you see galaxies through a telescope?
Galaxies are some of the most distant objects we can observe. While most planets, stars, and nebulae are usually pretty nearby to us, we can observe galaxies that are millions of light-years away. ... Even if a galaxy is bright, the most you might typically see is its core with a 4-inch telescope.
Which telescope is better Newtonian or refractor?
If nebulas and galaxies are your main interest, a Newtonian reflectorNewtonian reflectorThe telescope had a flat diagonal secondary mirror bouncing the light at a 90° angle to a Plano-convex eyepiece with a probable focal length of 4.5mm yielding his observed 35 times magnification.https://en.wikipedia.org › wiki › Newton's_reflectorNewton's reflector - Wikipedia or Schmidt-Cassegrain is the way to go. Moving up to a 90mm or 100mm refractor will snare more objects and provide better performance, for a higher price.
What are 3 disadvantages of refractor telescopes?
- Very high initial cost relative to reflector.
- A certain amount of secondary spectrum (chromatic aberration) unavoidable (reflector completely free of this) The colours cannot focus at one point.
- Long focal ratios can mean that the instrument is cumbersome.
Is refractor better than reflector?
Refractors generally have the edge over reflectors for a quality image, both from the standpoint of lens/mirror quality and precision optical mountings, and lack of central obscurations. Equally important in a choice of telescope type is the focal length and the resulting field of view.