Astro+fov+calculator+hot |best| 〈Full HD〉
Pixel Scale=(Pixel Size (μm)Focal Length (mm))×206.265Pixel Scale equals open paren the fraction with numerator Pixel Size open paren mu m close paren and denominator Focal Length (mm) end-fraction close paren cross 206.265
The diameter of the main lens or mirror, which dictates light-gathering power but not the framing. astro+fov+calculator+hot
θwide≈57.3⋅23.5250≈5.39∘theta sub wide end-sub is approximately equal to the fraction with numerator 57.3 center dot 23.5 and denominator 250 end-fraction is approximately equal to 5.39 raised to the composed with power Step 2: Compute FOV for the Askar 103PH Using the same formula for the longer focal length: Pixel Scale=(Pixel Size (μm)Focal Length (mm))×206