What is the best size eyepiece for 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.
What can you see with a 25mm telescope eyepiece?
25mm – 30.9mm Telescope Eyepieces: These are extended field eyepieces for longer focal length – good for large nebula and open clusters. For shorter focal length, they are fantastic for large objects such as the Orion nebula, views of the full lunar disc, large open clusters and more.
How many mm should a telescope be?
The aperture’s diameter (D) will be expressed either in millimeters or, less commonly, in inches (1 inch equals 25.4 mm). As a rule of thumb, your telescope should have at least 2.8 inches (70 mm) aperture — and preferably more.
Are Celestron eyepieces interchangeable?
They will work well in telescopes with a focal ratio of F/6 or more if they are of good quality. But you do not have to use only Celestron eyepieces with a Celestron telescope, you can use any eyepiece you want as long as it’s barrel fits the diagonal.
What does 70mm telescope mean?
The aperture in a telescope is the size of the frontal lens or mirror, the one that captures the light. In the case of 70mm telescopes, the “mm” stands for millimeters and is equivalent to 2.7 inches.
What is the difference between a 2 inch and 1.25 inch eyepiece?
A 2″ eyepiece will have a larger field stop than a 1.25″ giving you a wider field of view. Typically this would be for eyepieces 30 – 40mm focal length. Usually you only need one eyepiece in this range for your lowest power views.
Are Celestron eyepieces good?
Celestron X-Cel LX Series Eyepiece is another excellent product from Celestron. It works well for all 1.25-inches telescope, and it is adapted to accept colored and moon filters. This telescope eyepiece is affordable and comes in a protective box that makes it durable.
