What are the advantages of refractor telescopes?

Advantages. Refractor telescopes are rugged. After the initial alignment, their optical system is more resistant to misalignment than the reflector telescopes. The glass surface inside the tube is sealed from the atmosphere so it rarely needs cleaning. read more

Disadvantages of Refracting Telescopes. They can be heavy especially larger aperture telescopes because of their need for large lenses, They can also have a longer body which may impact on transportation and storage , And there is a certain amount of secondary spectrum ( chromatic aberration ) unavoidable ( the reflector completely free of this ) . read more

Refractors are actually the most expensive telescopes per aperture. The advantages are that they quickly reach thermal equilibrium and have no obstructions in their light paths, which means higher contrast. read more

Advantages and Disadvantages of Refracting Telescopes: Advantages: 1. Superior revolving power per inch of aperture 2. Superior performance in inferior conditions - image steadier 3. Not reflections or interruption of light path 4. Near permanent optical alignment - minimum maintanance 5. read more