refracting telescope

Optical instrument that uses an objective lens to observe celestial bodies.

dew shield

Device placed in front of the objective to limit stray light and condensation.

star diagonal

Part serving to deflect the light toward the eyepiece, thereby providing a comfortable observation position.

focusing knob

Adjusting device that makes it possible to obtain a clear image of the object.

altitude fine adjustment

Fine-tuning device serving to position the telescope vertically.

fork

Mount with dual forks used to secure the telescope to the tripod.

declination setting scale

Graduated disk indicating the declination of the celestial body observed.

azimuth clamp

Clamp serving to lock the telescope along its horizontal axis.

altitude clamp

Clamp serving to lock the telescope along its vertical axis.

right ascension setting scale

Graduated disk indicating the right ascension of the observed celestial body.

counterweight

Weight equal to that of the telescope; makes it possible to balance the whole.

tripod

Stable three-legged stand of variable height.

tripod accessories shelf

azimuth fine adjustment

Fine-tuning device serving to position the telescope horizontally.

eyepiece holder

cradle

Part that tightens around the main tube to secure it to the base.

main tube

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

finderscope

Small low-magnification telescope with a wide field of view; serves to locate celestial bodies.

eyepiece

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