Table of Contents
What is a good focal ratio for a telescope?
For such objects, a focal ratio of f/10 or more is ideal. But if you want to see wide views of star clusters, galaxies, and the Milky Way, a lower focal ratio is better. You get less magnification, but you see more of the sky. Wide field telescopes have a focal ratio of f/7 or less.
What can I see with a 700mm focal length telescope?
Protos 350X Advance 60700 Professional 60mm Aperture 700mm Focal Length Reflecting Telescope (Manual Tracking) Hurry, Only a few left! The telescope is way better than expected. Though it’s cheap, it can show great views of planets like Jupiter, Saturn and Mars.
What does the focal length of a telescope mean?
Generally expressed, focal length is the distance (given in millimeters) between the telescope’s primary lens or mirror and the point where the light rays come together in focus.
What is the focus plane?
The focal plane is the distance between your camera lens and the perfect point of focus in an image. This area is located a certain distance in front of your camera lens, and spans horizontally, left to right across your frame.
What magnification do you need to see Jupiter?
Generally a magnification of 30-50x the aperture of your telescope (in inches) works well on nights of average seeing. So if you have a 4-inch telescope, try 120x to 200x. If you have razor sharp optics and steady sky, you can get away with even more magnification.
What size telescope do I need to see the rings of Saturn?
25x
The rings of Saturn should be visible in even the smallest telescope at 25x [magnified by 25 times]. A good 3-inch scope at 50x [magnified by 50 times] can show them as a separate structure detached on all sides from the ball of the planet. Want to see Saturn’s rings?
How does a focal plane work?
A first focal plane (FFP) scope is one in which the reticle appears to change size as you adjust the magnification. The reticle appears small when zoomed out and large when zoomed in. A one mil mark in your crosshairs, for example, will stay constant throughout the range of magnification.
What is the focal plane and how is it limited?
How is it limited? Where did you see limitation occur? Focal plane: imaginative area of a lens that is perpendicular to the focal point. Light enters the sides of the focal plane and is restricted by the aperture or opening of the lens.