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cross section of a refracting telescope click to hear : cross section of a refracting telescope

Magnification depends on the length of the main tube and the size and composition of the lens system.
cross section of a refracting telescope image
achat d'image achat d'image

See cross section of a refracting telescope in : french | spanish
eyepiece main tube objective lens light

eyepiece click to hear : eyepiece

Lens or system of lenses meant to magnify the image when placed before the eye.

main tube click to hear : main tube

The barrel of a telescope housing the optical system; light rays travel through the main tube.

objective lens click to hear : objective lens

Lens that captures light from the object observed and causes it to converge.

light click to hear : light

Emitted by a celestial body, light is captured by the objective lens and travels along the main tube until it reaches the eyepiece.