बार्लो आवर्धन कैलकुलेटर — सूत्र

Barlow Lens Effect

A Barlow lens is a diverging lens placed before the focal plane that increases the effective focal length.

Formulas

f_eff = f * B N_eff = N * B

where B is the Barlow magnification factor (commonly 2x or 3x).

This narrows the FOV and increases the image scale, useful for planetary and lunar imaging.