Bigger aperture and field of view than a 20D. 22D lens for general fundus exam with the binocular indirect ophthalmoscope. Large diameter and unique optical design combine magnification with very wide field of view.
Image Mag: 2.72x
Laser Spot Mag: .37x
Static FOV: 60°
Working Distance: 39mm
Clear Aperture: 52mm
Lens Weight: 48g