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Astronomical Formulae – Saguaro Astronomy Club
- https://www.saguaroastro.org/astronomical-formulae/#:~:text=FORMULAE%20FOR%20ASTROPHOTOGRAPHY%20F-NUMBER%3A%20PRIME%20FOCUS%20%28ERECT%20IMAGE%29,f%2F%20is%20the%20f-number%20of%20the%20system%20%28objective%29
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Astrophotography Formulae
- https://astropix.com/html/astrophotography/astrophotography-formulae.html
- Formulae for Astrophotography Calculators for Astrophotography Field of View Field of View = ( (57.3 / scope focal length) * frame size) FOV = ( (57.3 / FL) * FS) Where FOV = Field of View in degrees FL = Scope Focal Length in mm FS = Frame Size in mm f = Scope Focal Ratio Example: A Canon T2i (550D) has a sensor that is 22.3 x 14.9 mm.
Use the 500 Rule for Astrophotography | Useful Chart to …
- https://astrobackyard.com/the-500-rule/
- The original NPF Rule was developed by Frédéric Michaud, and the formula is as follows: (35 x aperture + 30 x pixel pitch) ÷ focal length = shutter speed in seconds. If you don’t know what the pixel pitch …
Practical Formulae for the astrophotographer - Astrosurf
- http://www.astrosurf.com/luxorion/report-formulae.htm
- The size of the sharpness field along the optical axis depends in the focal ratio F/D according to the next formula : Radius of sharpness field (°) = arctg (0.0109 * F 2 /D 3) If parameters are expressed in millimeters, the radius of the sharpness field is expressed in degrees. Note that on hand calculators, arc tangent is the tan -1 key.
Astronomical Formulae – Saguaro Astronomy Club
- https://www.saguaroastro.org/astronomical-formulae/
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Astrophotography: How Long Can You Go? - Sky
- https://skyandtelescope.org/astronomy-blogs/imaging-foundations-richard-wright/astrophotography-rule-of-500-how-long/
- You take the number 500 and divide by the focal length of your lens. For example, if you have a 20-mm wide angle lens, then 500 / 20 = 25. You can shoot for 25 seconds on a tripod before the stars start to streak. Rules of thumb have their place.
Astronomy Formulas Explained with Sample Equations
- https://telescopeschool.com/astronomy-formulas-explained-with-sample-equations/
- The formula for the G L is: Where: G L = light grasp D O = diameter of the objective D eye = diameter of the eye pupil. Meanwhile, the formula for the Stellar Magnitude Limit is: Sample Computation: You want to observe a particular star with a magnitude of 8.8 using your current telescope with an objective diameter of 100 mm.
Astrophotography for Beginners (6 Steps to Amazing …
- https://skiesandscopes.com/astrophotography-for-beginners/
- Exposure length. This is the amount of time that your camera will take to collect light for one image. There is a good rule of thumb for working out the exposure length you should use for astrophotography which is called the 500 rule. This is worked out by dividing 500 by the focal length of the lens.
The NPF Rule: A Formula for Sharp Star Photos Every Time
- https://petapixel.com/2017/04/07/npf-rule-formula-sharp-star-photos-every-time/
- The NPF Rule A much more complicated and accurate rule for sharp stars is: ( 35 x aperture + 30 x pixel pitch) ÷ focal length = shutter speed in seconds. Pixel pitch = the camera sensor’s physical...
Undersampling & Oversampling In Astrophotography
- https://www.highpointscientific.com/astronomy-hub/post/astro-photography-guides/undersampling-and-oversampling-in-astrophotography
- Calculated resolution is displayed as arcseconds per pixel ( “/pixel ). It’s calculated by dividing your pixel size by your scope's focal length and then multiplying this by 206.3. So what does this all mean? This means that you must pair your focal length, pixel size, and seeing conditions together to create a well sampled astro imaging setup.
Image scale formula? - Experienced Deep Sky Imaging - Cloudy …
- https://www.cloudynights.com/topic/596063-image-scale-formula/
- Image scale formula? - posted in Experienced Deep Sky Imaging: Have the New TSA120 coming and was setting up a profile in SGPRO to get ready. ... The author of The Hundred Best Astrophotography Targets uses between 0.6 and 2, with some higher image scales using camera lenses on really big targets. The author of the Deep Sky Imaging Primer ...
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