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1. astronomy.tools › calculators › focal_length_ratioFocal Length & Ratio Useful calculators and formulae.

   astronomy.tools › calculators › focal_length_ratio

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   Focal Length Calculator. Calculate the focal length of your telescope. Formula: Aperture X Focal Ratio. Aperture: mm. X Focal Ratio: f/. = Focal Length: mm.

   • Field of View

     Field of View Calculator Test different telescope, camera &...

2. astronomy.tools › calculators › field_of_viewField of View Calculator - astronomy.tools

   astronomy.tools › calculators › field_of_view

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   Field of View Calculator Test different telescope, camera & eyepiece combinations.

3. skyandtelescope.org › observing › telescope-calculatorTelescope Calculator: How Does Your Telescope Perform?

   skyandtelescope.org › observing › telescope-calculator

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   31 sie 2017 · Telescope Calculator Inputs: Scope Aperture: The diameter of a telescope’s main lens or mirror — and the scope’s most important attribute. Scope Focal Ratio (f/number): A lens or mirror’s focal length divided by its aperture. For instance, a telescope with an 80-mm-wide lens and a 400-mm focal length has a focal ratio of f/5.

4. www.astropix.com › html › astrophotographyCalculators for Astrophotography

   www.astropix.com › html › astrophotography

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   Afocal Projection. Barlow Projection. Maximum Exposure Length for Planetary Rotation. Calculator Instructions. Calculators already have sample data in them. Some are examples from my telescope, a C11 SCT with 279.4 mm of aperture and 2,794 mm focal length at f/10.

5. telescope-calculator.co.ukTelescope Calculator

   telescope-calculator.co.uk

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   Please select one of 458 telescopes from the drop-down box, or use Manual mode to enter the aperture and focal length by hand.

6. www.omnicalculator.com › physics › telescope-magnificationTelescope Magnification Calculator

   www.omnicalculator.com › physics › telescope-magnification

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   31 maj 2024 · Use this telescope magnification calculator to estimate the magnification, resolution, brightness, and other properties of the images taken by your scope.

7. stellafane.org › tm › atmStellafane ATM: Telescope Formulas and Calculator

   stellafane.org › tm › atm

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   You don't need to use the calculation feature - just scroll down the output table to find the formula you need. All variables used are always defined in rows nearer the top of the table. If you have measured a Sagitta (depth of Curve) and want to calculate Focal Length, use our Sagitta to Focal Length Calculator .