Hellma glass filter set 666-S005

Glass filter set type 666-S005 for checking wavelength accuracy (holmium) and photometric accuracy (neutral glass) consisting of: F0, F1, F3, F4; a reference filter (F0), 2 neutral glass filters (F3, F4) with absorbances: 0.5 / 1.0, certified at wavelengths 440, 465, 546.1, 590, 635 nm and a holmium glass filter (F1) certified at wavelengths: 279, 361, 453, 536, 638 nm, in high-quality storage box with DAkkS calibration certificates Attention: article available until 30.06.2022. Further information will follow.