How many mm should a telescope be to see planets?
The focal length of the telescope is 900mm, so to achieve the maximum useful magnification, then a 4.5mm eyepiece would be ideal. One of the best parts about planetary viewing or imaging is that since the objects are so bright, you can do it just about anywhere regardless of light pollution.
Which telescope lens is stronger 10mm or 25mm?
The above formula dictates that a telescope eyepiece with a shorter focal length yields a higher magnification than an eyepiece with a longer focal length. For example, a 10mm eyepiece will always provide a higher magnification than a 25mm eyepiece.
What is a 10mm telescope lens good for?
10mm – 13.9mm Telescope Eyepieces: These are fine to use across all focal lengths and offer great background darkening capabilities for studying planetary nebula, small galaxies, planetary details and lunar details.
What type of telescope is best for viewing planets?
Both refractor and reflector telescopes are best for viewing planets. A good quality telescope with an aperture of 3.5” to 6” will give a beginner great views.
What can you see with a 120mm refractor?
The Sky-Watcher USA StarTravel 120mm f/5 AZ Refractor Telescope is a compact yet powerful optical tube assembly (OTA) that can be used to see detailed views of celestial objects from the moon to bright deep-sky objects, or as a conventional spotting scope to enjoy high-resolution and close-up observations of wildlife.
Is 10mm or 20mm better for telescope?
Magnification is determined simply by dividing the focal length of the telescope by the focal length of the eyepiece. This means that a smaller number on an eyepiece gives a higher magnification. A 10mm eyepiece would provide twice as much magnification as a 20mm eyepiece.
What can you see with a 102mm telescope?
This large 102mm (4.0″) aperture gives bright, sharp images for both land and celestial objects. Whether you’re viewing the rings of Saturn, the moons around Jupiter, nebulae, or land objects, the Infinity 102 Refractor allows the first-time observer to explore the world, solar system, and beyond.
Is a 10mm stronger than a 20mm telescope?
Is a 20mm telescope good?
A 20 mm is useful just as a 13 mm is useful in most any telescope but I’m not sure “all purpose” is a good description. My telescopes range in focal length from under 400 mm to about 2800mm, a 20mm is not a planetary or high power or even mid-power eyepiece in any of them, it’s a low to mid power deep sky eyepiece.
https://www.youtube.com/watch?v=Bmz34UU_n7o