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Both calculators run independently — change the inputs on either side to compare results.

Telescope Resolution Calculator

Determine the angular resolution, light-gathering power, or limiting magnitude of a telescope based on aperture and wavelength. Perfect for amateur astronomers comparing instruments or planning observations.

Telescope Aperture (mm)

Observation Wavelength (nm)

Human Eye Aperture (mm)

Calculate

Fill in the required fields to see your result.

Optics

Numerical Aperture Calculator

Calculate the numerical aperture (NA) of an optical fiber from the refractive indices of its core and cladding. NA determines light-gathering ability and the maximum acceptance angle of the fiber.

Core Refractive Index

Cladding Refractive Index

Fill in the required fields to see your result.

Key differences

	Telescope Resolution Calculator	Numerical Aperture Calculator
Category	Optics	Optics
Inputs required	4	2
Result	Result	Numerical Aperture
What it does	Determine the angular resolution, light-gathering power, or limiting magnitude of a telescope based on aperture and wavelength. Perfect for amateur astronomers comparing instruments or planning observations.	Calculate the numerical aperture (NA) of an optical fiber from the refractive indices of its core and cladding. NA determines light-gathering ability and the maximum acceptance angle of the fiber.