What is the focal length of the Celestron c90?
1260 mm
Celestron C90 MAK Spotting Scope Features
| Aperture | 90 mm (3.5″) |
|---|---|
| Focal Length | 1260 mm |
| Focal Ratio | f/14 |
| Free Shipping | Yes |
| Glass Type | BaK4 |
What is Mak spotting scope?
The MAK is a catadioptric spotting scope, which means the optical design includes both a lens and a mirror. The light coming through a MAK passes through the corrector lens to the primary mirror and back to a spherical secondary mirror before it hits the eyepiece.
Who makes Celestron spotting scopes?
Celestron
| Type | Private |
|---|---|
| Headquarters | Torrance, California , United States |
| Key people | Tom Johnson (Founder) |
| Products | Telescopes and other optical / mechanical devices |
| Website | Celestron.com |
What is a Maksutov Cassegrain telescope?
Maksutov-Cassegrains are another type of compound telescope, similar to Schmidt-Cassegrains. They have a spherical mirror to collect light and a curved lens up front to correct for aberrations. But the corrector lens on a Mak has a simple spherical curvature which is easy to manufacture.
Who owns Orion telescopes?
Optronic Technologies, Inc., better known to backyard astronomers as Orion Telescopes & Binoculars, has announced the acquisition of Meade Instruments following the approval of the United States Bankruptcy Court for the Central District of California.
Are Questar telescopes still made?
Questar was founded in 1950 by Lawrence Braymer, who set up Questar to develop and market Maksutov telescopes and other optical devices for the consumer, industrial, and government customers. The Questar Standard telescope has been in production since 1954.
Where are Meade eyepieces made?
Meades are still made in Mexico, though I believe that may change in the future.