What is polarized light? - GCSE - MyTutor - polarisation of light definition

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Useful for calculating exit pupil. You might want to default the Barlow mag value to 1 so that you dont get DIV/0 errors.

Hi everyone, I've made a simple excel spreadsheet calculator for eyepiece Mag and exit pupil size it also allows Barlow magnification to be calculated.

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BTW, have you seen the calculators that FLO have created at https://astronomy.tools/calculators/magnification ? I am not sure they have a calculator for exit pupil but there is mention of exist pupil on this page

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I am using an 8x10 view camera with a 210mm lens. The formula for hypperfocal distance H =f^2/Nc, assuming N=22 and c=0.01, predicts a hyperfocal distance of 66 ...

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Edmund Optics® (EO) has been a leading global manufacturer and supplier of optics, imaging, and photonics technology that has served a variety of markets including Life Sciences, Biomedical, Industrial Inspection, Semiconductor, R&D, Safety & Security since 1942. EO designs and manufactures a wide selection of optical components, multi-element lenses, imaging systems, and optomechanical equipment, while supporting original equipment manufacturer (OEM) applications with volume production of stock and custom products. The company employs over 1.250 employees in more than 18 countries across the globe and continues to expand.

For example, linearly polarized light remains linearly polarized, although its orientation (angle ) may rotate. However, for angles greater than θc, different ...

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I posted this purely out of my desire to help others where I can and because I hadn't seen any readily available to newcomers.

All I was trying to say is that when Barlow mag is blank or zero Excel shows a division by zero error, so if you fill 1 in the Barlow mag column that will resolve it. 🙂

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You simply type in your objective or mirror diameter in mm and the focal length of your scope in mm and the focal length of the eyepiece that you are looking at or considering and the sheet will calculate your magnification and exit pupil size. If you are using a barlow type the mag of the barlow (eg for a 2x barlow type 2 in the box under Barlow mag X) and the sheet will calculate the revised magnification and the size of the exit pupil too.

The f-number of an object is the ratio of focal length and aperture diameter, and used for indirectly indicating the aperture size. Large numbers imply ...

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All I was trying to say is that when Barlow mag is blank or zero Excel shows a division by zero error, so if you fill 1 in the Barlow mag column that will resolve it. 🙂

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Useful for calculating exit pupil. You might want to default the Barlow mag value to 1 so that you dont get DIV/0 errors.

I just thought some newer members might also get some benefit from it. You won't need to have excel on your device to be able to use it as it will work in your Google Chrome browser window.

Hi, many thanks and I really appreciate your kind comments but Ill just be happy if a few newcomers find it a useful when they're considering buying eyepieces as that's the reason I made it for myself.

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I could do the math on the phone but as I'm considering several eyepieces in the future it's nice to be able to see at a glance up to 10 possibilities at the same time and compare them. No point in having focal lengths to close together is there?

No, I hadn't seen any calculators for exit pupil so decided to make my own. Just thought Iwhilst I was doing it that I'd share it with anyone who may want to use it.