Fov calculator telescope

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Forgot your password? By 12dstring August 11, in Discussions - Software. You may have come across a field of view calculator I wrote over 5 years. It's by far the most popular thing I've written, and gets quite a lot of links from various SGL threads. It originally was just a simple calculator, but was expanded to something of a fov simulator. I've been working on a new version on-and-off for some time now, and it's finally at a stage where it does something useful so would love to get some feedback.

Fov calculator telescope

There are a lot of terminologies to learn when you start a new hobby and astronomy is no exception. So what is it? Put very simply, the field of view is how much sky you can see, as measured in degrees. Since we only have eyes at the front that look forward, this is impossible. More realistically then, the average human eye, without the help of binoculars or a telescope, has a field of view of about degrees. In other words, we can typically see everything in front of us and a little way to the sides. In astronomy, the field of view usually refers to how much of the sky we can see through either binoculars or the eyepiece of a telescope. You can observe the Moon with two different sets of binoculars that both have a magnification of 10x. If one has a larger field of view than the other, it simply means you can see more of the surrounding sky. The Moon itself will appear exactly the same through both pairs of binoculars. This typically involves starting with a bright star and then hopping across to other stars until you reach your destination. Get the field of view wrong and you could get lost looking for the next star to hop to. There are two other reasons why your field of view is important — and they both come into play once you have your target in your sights. The smaller your field of view, the fewer stars you can see.

Garethr Posted December 2, Reducers and barlows need to be added by us. Dividing 60 by 27 fov calculator telescope me a true field of view of about 2.

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The field of view FOV in a telescope defines the extent of the observable universe that is visible through the eyepiece at any given moment. Knowing the FOV allows astronomers to determine the ideal eyepiece for a specific observation. Calculation of the TFOV is done by dividing the AFOV of the eyepiece by the magnification of the telescope, or through the relationship of the focal lengths of the telescope and the eyepiece. The TFOV is typically expressed in degrees. The FOV in the eyepiece is determined by its specific AFOV, and the choice of eyepiece thereby plays a vital role in the observational experience.

Fov calculator telescope

Telescopes open our eyes to the marvel of the cosmos: the telescope field of view calculator will tell you exactly how much! Our eyes work pretty okay, but they are absolutely useless when it comes to distant things. It makes sense: we evolved to see predators a hundred meters away, not stars on the other side of the galaxy.

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Updated: Jan 24, Posted August 11, It would be quite handy just to flick through when deciding what to image next! Unlike a telescope, the focal lengths of eyepieces are very short and will typically range anywhere between 3mm and about 40mm. Thanks for putting the work into this upgrade. Not so; I am able to recall the method of the calculation due to how the information is presented. Well Dave, I think it's a vast improvement and v1 is a belter it's lightening fast in comparison. The final reason is largely aesthetic. Does look a whole lot slicker and performs nicely in firefox. They all play a part. The larger the first number, the more magnification. Thank you, David! You are right, this is a wonderful time for anyone interested in astronomy. Since we only have eyes at the front that look forward, this is impossible.

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Great job. If one has a larger field of view than the other, it simply means you can see more of the surrounding sky. A simulated view of the full Moon through an 8mm eyepiece at 81x with a field of view of 0. It is darned difficult to give explanations, which is why it's interesting and worth talking about. Thanks Dave - I've used the v1 fov calc extensively and found it extremely useful. The only downside is it won't work with older browsers tested with Firefox 24, IE 10, Chrome 28 and Opera Really like the image flip and recenter options and the database of scopes and eps looks very extensive. Existing user? Link to comment Share on other sites More sharing options Forgot your password? Posted August 15,