Phoenix Filters

Phoenix Order Sorting Filters
Name	Start*	Stop*	Transmission	echelle
	cm^-1 μm	cm^-1 μm	percent	order**
M1930	1890=5.291	1970=5.076	80	11
M2030	1980=5.050	2080=4.808	85	11
M2150	2105=4.751	2190=4.566	84	12
L2462	2410=4.149	2495=4.008	85	14
L2734	2680=3.731	2770=3.610	80	15
L2870	2820=3.545	2910=3.436	85	16
L3010	2950=3.390	3050=3.279	90	17
L3100	3030=3.300	3145=3.180	91	17
L3290	3240=3.085	3355=2.980	80	19
K4132	4077=2.452	4156=2.406	72	23
K4220	4188=2.392	4263=2.348	59	24
K4308	4258=2.349	4355=2.296	50	24
K4396	4355=2.296	4446=2.249	55	25
K4484	4429=2.250	4525=2.210	67	25
K4578	4525=2.210	4630=2.160	65	26
K4667	4617=2.166	4717=2.120	73	26
K4748	4704=2.126	4803=2.082	74	27
H6073	6017=1.662	6129=1.632	84	34
H6420	6377=1.568	6464=1.547	66	36
J7799	7750=1.290	7865=1.271	65	44
J8265	8243=1.213	8360=1.196	50	47
J9232	9183=1.089	9286=1.077	42	52
J9671	9652=1.036	9709=1.030	53	55

*At full transmission, wings extend further.
**At center of band pass.
Filters K4132 and J9671 are not currently installed in Phoenix.

KPNO Filter Information