How Do You Calculate The Field Of View Of The Sky-Watcher SK909AZ3 Refractor Telescope?
The area that you can see through your telescope is known as the true or actual field of view. The field of view of your telescope is determined by the design of the eyepiece of the telescope. Calculating the field of view of a telescope can be done by following a few steps. Find out the value of the apparent field of view. Every eyepiece has its own value of the apparent field of view. This value of your eyepiece is supplied from the manufacturer. Find the value of magnification. The value for magnification can be found out by dividing the value of the focal length of your telescope by the focal length of the eyepiece. Assuming your telescope has a focal length of 750 mm and the focal length of your eyepiece is 10 mm, the magnification for your telescope is equal to 750 / 10 = 75. It is usually denoted as 75X. The focal length for this model is 900 mm. Divide the value of the apparent field of view by the value of magnification to get the value of the field of view. For example, your
