Grisms for spectral observations (longslit, multislit, slitless)

Name	lines/mm	Spectral range, A	FWHM, A	Dispersion*, A/px
VPHG400	400	3500-9500	13	3.0
VPHG550G	550	3500-7200	10	2.1
VPHG550R	550	6000-10000	10	2.1
VPHG1200B	1200	3600-5400	5.5	0.87
VPHG1200G	1200	4000-5700	5	0.88
VPHG1200R	1200	5700-7500	5	0.86
VPHG1200IR	1200	7600-9300	5	0.86
VPHG1800R	1800	6100-7100	2.5	0.52
VPHG2300G	2300	4700-5500	2.2	0.38

*Reciprocal dispersion for CCD EEV42-40

Grisms total transparency (grisms+optics+CCD)