Hellma ND Glass Filter Set; F1, F2, F3, F4 and F390 - 666S010

Hellma F1 Holmium Glass Filter Set for Checking Photometric and Wavelength Accuracy, for UV/Vis spectrophotometry

Product Number: 666S010

APPLICATION

Neutral density glass filters:
F2 (0.25 Abs)
F3 (0.5 Abs)
F4 (1.0 Abs)
F390 (0.04 Abs), reference filter

CERTIFIED WAVELENGTHS IN NM

W: 279, 361, 453, 536, 638
A: 440, 465, 546.1, 590, 635