1 digitalf ilterUV
2 can be used at all times for protection of camera lens
3 high guality b 270 schoot

UV filters are individual compounds or mixtures to prevent ultraviolet (UV) light from getting through. UV filters are used in sunscreens to protect skin or in photography to reduce the level of ultraviolet light that strikes the recording medium

  Many photographers still use UV filters as protection for their lenses, due to their low cost and lack of effect on the exposure of the shot. However, UV filters (in particular filters lacking optical coating) may introduce lens flare and have an adverse impact on contrast and sharpness, especially when a strong light source is present.[1]

Glass material Schootinstruments(schott)B270

Face shape accuracy :n 5

Double- faced coating comprehensive  specifications

300 --350nm Tave≤1%

370±100nm T =50%

450 --680nm Tave ≥99%