DJI Wide-Angle Lens for Air 3 with Lens Cleaning Pen bundleDJI Air 3 Wide Angle Lens with Precise Optical Design, 14mm Format Equivalent, and 114 Degree FOV Focus Lens Cleaning Pen The Focus Lens Cleaning Pen is perfect for cleaning binocular lenses, small aperture spotting scopes, telescope eyepieces and other optical items. Comes with a handy retractable dust removal brush. Safe and very easy to use.