# How To Calculate Tube Length Of A Telescope

How To Calculate Tube Length Of A Telescope. tube the minimum height and adapter is 1.25 µ. In this configuration the distance from secondary mirror to focal plane in a 15 µ O.D. tube would have been 9.0625 µ (with. Focal length is the distance the light travels to go from the entry to the exit point in a telescope. The focal length is important to determine the magnification and field.

Calculating the length of a telescope tube is a relatively simple task that involves a few basic mathematical concepts. The first step is to determine the focal length of the telescope. This is the distance between the primary mirror and the focal point, which is where the image is formed. Once the focal length is known, you can use the following formula to calculate the tube length: Tube Length = Focal Length x 2.

For example, if the focal length of a telescope is 300mm, the tube length would be 600mm (300 x 2 = 600). It is important to note that the tube length is the same for all types of telescopes, including refractors, reflectors, and catadioptric telescopes.

In addition to the tube length, you also need to calculate the length of the focuser, which is the part of the telescope that holds the eyepiece. This is done by subtracting the focal length from the tube length. For example, if the tube length of a telescope is 600mm, the focuser length would be 300mm (600 – 300 = 300).

Once you have calculated the tube length and focuser length, you can then calculate the total length of the telescope by adding the two lengths together. For example, if the tube length is 600mm and the focuser length is 300mm, the total length of the telescope would be 900mm (600 + 300 = 900).

## Conclusion

Calculating the tube length of a telescope is a relatively simple task that involves basic mathematics. The first step is to determine the focal length of the telescope, which is then used to calculate the tube length. The focuser length is then calculated by subtracting the focal length from the tube length. Finally, the total length of the telescope is obtained by adding the two lengths together.

## Find length of the tube of telescope | Ray Optics | Physics | Filo

In this video, Filo discusses with you a question wherein you need to find the length of the tube of telescope. The Question is given below: An astronomical refractive telescope has an objective of focal length 20m and an eyepiece of focal length 2cm. Find length of the tube of telescope This question is from the topic Ray Optics from class 11th. This topic is equally important for Jee 2022 | Jee 2023 | Neet 2022 | Neet 2023. The video is…

Now to select the length of the tube given a 1.5 µ focuser with a 7.625 µ O.D. tube, then the … Several quantities will be necessary to calculate h ow rigid our telescope tube will be.. Enter all other parameters and "calculate" an F.P. Distance. Add 1/2 the total focuser travel distance to the "calculated" F.P. Distance value. Add the E.P."group" average field stop. The above calculation assumes that the image is formed as a virtual image at infinity for comfortable viewing; this is the standard practice. The calculation involves application of., How To Calculate Tube Length Of A Telescope.

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