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Framing Your Astro Images: Understanding Field of …
Web23 mrt. 2012 · Where 2 lines intersect = intersection point. This is done for all 3 sides giving 3 intersection points. These points are then used to draw a new triangle and from this triangle to focal length can be calculated as shown in this research. But my values are way off. For this image the focal length is known as 18mm but the value I get is 478.634.... WebThe following equation allows one to calculate the dioptric power and thus the focal length of lens made of a material with refractive index n and with curvature radii R1 and R2 on the two surfaces: The curvature radii are … short hair with perm on top
Focal Length, Wavelength Relationship - Physics Stack Exchange
Web7 okt. 2024 · This is not a common lens focal length so either the working distance would need to be adjusted or a non-standard lens that allows the user to vary the focal length … Web13 mei 2016 · Pixel scale would be much esier if you have it: Pixel scale (arcsec) = pixel size (micron)*206.265/focal length (mm) You can use Astronomytools or other websites. … Web2 mei 2013 · How do you calculate the true focal length of an SCT with a focal reducer in two different positions. Presumably, if I place a 20mm spacer between the rear cell and … short hair with perms