astronomy > astronomical observation > refracting telescope > cross section of a refracting telescope image

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Magnification depends on the length of the main tube and the size and composition of the lens system.

$cross section of a refracting telescope image$

See cross section of a refracting telescope in : french | spanish

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

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

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

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