Barlow Lens: Definition, How it Works, How to Use
Barlow lenses are diverging optical devices used to increase magnification in telescopes and microscopes. These negative lenses extend the effective focal length of optical systems, doubling or tripling magnification without replacing existing components. Barlow lenses are available in 2x or 3x magnification powers and come in achromatic or apochromatic versions. Common specifications include 10-30 mm…