Tube MathMagnification and exit pupil
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Solar warning

Never look at the Sun through a telescope, finderscope, or eyepiece without a certified full-aperture solar filter fixed on the objective.

This calculator does not certify a filter and does not list telescopes for sale.

Magnification math before eyepiece and camera shopping

Visual mode uses eyepiece focal length; imaging mode uses pixel scale—neither lists gear for you.

Telescope dealers bundle OTA, mount, and eyepiece sets once you confirm target field width and tracking needs. Astrophotography shops sell cooled cameras with matching flattener/reducer kits. Planetarium educators run beginner courses that include safe solar filters—magnification alone does not pick accessories.