This makes refractors well-suited as multi-purpose telescopes for both terrestrial observing and stargazing, unlike Newtonian reflectors which produce inverted images and are only suited for astronomical observing.
Refractors come in two basic types, achromatic and apochromatic..
The aperture is the most important thing to consider when evaluating the power of a telescope.
If budget isn't an issue, it is best to go for an aperture that is as big as possible since: the diameter of the aperture determines the images' brightness.
The bigger the scope, the more light it gathers..
Astro-Physics, Inc. is a manufacturer of amateur telescopes, mounts, and accessories.
Founded in 1975 by former Sundstrand Corporation engineer Roland Christen, the company is noted for its line of apochromatic refractors as well as high-end mounts.
The company is located in Machesney Park, Illinois..
A reflector telescope is said to be the best value for your money, as they offer the most aperture for your dollar.
For example, a 6-inch diameter refractor telescope can cost up to 10X as much as a 6-inch Newtonian reflector..
On astronomers’ wish list for the next decade: two giant telescopes and a space telescope to search for life and habitable worlds beyond Earth
An artist’s rendering of the Giant Magellan Telescope in Chile
Astronomers propose linking it with another giant telescope, the Thirty Meter Telescope, to create the Extremely Large Telescope project
As long-time customers know, Astro-Physics telescopes and mounts have been in high demand for many years
We take a considerable amount of time with each instrument to be sure that it performs exceptionally well and we have a reputation for excellent service and support
Over the years, our customers have been our best salespeople
This article lists some galaxy groups and galaxy clusters.
This is a list of large optical telescopes.For telescopes larger than 3 meters in aperture see List of largest optical reflecting telescopes.This list combines large or expensive reflecting telescopes from any era
As what constitutes famous reflector has changed over time.In 1900 a 1-meter reflector would be among the largest in the world
But by 2000Would be relatively common for professional observatories.
