The InSight clarifying lenses are designed from top-quality European optical glass and specified to the tightest tolerances and critical parameters to ensure the best optical quality. The anti-reflective lens coating has high light transfer and low light performance. These lenses are able to be removed totally separate from the housing and aperture for easy cleaning and optical use in all conditions. This kit includes 4 different clarifying lenses (A, B, C, D) and a protective case.