What is the equation for calculating the magnification of a telescope?

Thin Lens Equation | Formula, Problems & Examples

How to Calculate the Magnification of a Lens | Physics | Study.com

Magnification formula for lenses

Write Down the Magnification Formula for a Lens in Terms of Object Distance and Image Distance. How Does this Magnification Formula for a Lens Differ from the Corresponding Formula for a Mirror? - Science | Shaalaa.com

Magnification | Definition, Equation & Examples

What is Focal Length? Essentials with Examples

A Primer on Focal Length: Why Lenses Are One of the Most Powerful Tools at Our Disposal

The focal length of the magnifying glass.