Filter factor table with Wratten to photographic factor

Filtername	Type	Manufacturer	Manufacturer product sheet percent transmission	Peak wavelength (nm) Product sheet or Kodak spec	Kodak spec peak wavelength or cut-off	Adopted transmission	Adopted filter factor (reciporical of brightness)	Adopted log Optical density	Source Notes
08 Yellow, Light	Cut-off	Meade	0.83	580	0.89	0.89	1.13	0.05	Product spec. 83%; Kodak B-3 88.7% at 580nm
11 Yellow-Green	Cut-off	Meade	0.73	520	0.62	0.62	1.61	0.21	Product sheet states 73%; Kodak B-3 states 60.2%
12 Yellow	Cut-off	Meade	0.74	580	0.90	0.90	1.11	0.05	Product sheet states 74%, Kodak B-3 90.1%
12 Yellow, Deep	Cut-off	Celestron	0.74	580	0.90	0.90	1.11	0.05	Product sheet states 74%, Kodak B-3 90.1%
15 Yellow, Deep	Cut-off	Orion	0.67	590	0.90	0.90	1.11	0.05	Product sheet states 67%, Kodak B-3 90.1%
21 Orange	Cut-off	Meade	0.46	550	0.90	0.90	1.11	0.04	Product sheet states 46%, Kodak B-3 90.2% at 550nm
21 Orange	Cut-off	Celestron	0.46	550	0.90	0.90	1.11	0.04	Product sheet states 46%, Kodak B-3 90.2% at 550nm
23A Red, Light	Cut-off	Meade	0.25	690	0.90	0.90	1.11	0.05	Product sheet states 25%, Kodak B-3 90.1% at 690nm
25 Red	Cut-off	Orion	0.14	680	0.90	0.90	1.11	0.05	Product sheet states 14%, Kodak B-3 90% at 680nm
25 Red	Cut-off	Celestron	0.14	680	0.90	0.90	1.11	0.05	Product sheet states 14%, Kodak B-3 90% at 680nm
25 Red	Cut-off	Meade	0.14	680	0.90	0.90	1.11	0.05	Product sheet states 14%, Kodak B-3 90% at 680nm
38A Blue, Dark	Bandpass	Meade	0.17	430	0.58	0.58	1.74	0.24	Product sheet states 17%, Kodak B-3 57.5% at 430nm
47 Violet (Blue per Kodak)	Bandpass	Meade	0.03	440	0.50	0.50	1.99	0.30	Repacholi shows 50.3% at 440; Product sheet 3%
56 Green, Light		Meade	0.53			0.53	1.89	0.28	Est. Kodak spec
56 Green, Light		Celestron	0.53			0.53	1.89	0.28	Est. Kodak spec
58 Green	Bandpass	Meade	0.24	530	0.54	0.54	1.87	0.27	Product sheet states 24%, Kodak B-3 53.6% at 530nm
58 Green	Bandpass	Orion	0.24	530	0.54	0.54	1.87	0.27	Product sheet states 24%, Kodak B-3 53.6% at 530nm
58A Green		Celestron	0.24			0.24	4.17	0.62	Est. Kodak spec
80A Blue	Bandpass	Meade	0.30	430		0.74	1.36	0.13	Product sheet states 30%, Kodak B-3 73.5% at 430nm
80A Blue	Bandpass	Celestron	0.30	430		0.74	1.36	0.13	Product sheet states 30%, Kodak B-3 73.5% at 430nm
80A Blue, medium	Bandpass	Orion	0.30	430		0.74	1.36	0.13	Product sheet states 30%, Kodak B-3 73.5% at 430nm
82A Blue, Light	Bandpass	Meade	0.73	440		0.85	1.17	0.07	Product sheet states 73%, Kodak B-3 85.4% at 440nm
905 Variable Polarizing Filter	Density	Meade	0.25			0.25	4.00	0.60	Max (min 0.05)
Moon	Density	Celestron	0.18			0.18	5.56	0.74	Product sheet
ND96 Moon	Density	Meade	0.13			0.13	7.69	0.89	Product sheet
Variable Polarizing	Density	Orion	0.40			0.40	2.50	0.40	Max (min 0.01)
No filter	Baseline	N/a	1.00	530		1.00	1.00	0.00	Using no filter
OIII	Bandpass	Lumicon	0.98	499		0.98	1.02	0.01	Product spec. est.
H-beta	Bandpass	Lumicon	0.98	486		0.98	1.02	0.01	Product spec. est.
H-alpha	Cut-off	Lumicon Ha night sky	0.90	657		0.90	1.11	0.05	Product spec. est.
V-block	Bandpass	Orion	0.98	530		0.98	1.02	0.01	Product spec. est.
LPR-Broadband	Bandpass	Orion Skyglow	0.98	490		0.98	1.02	0.01	Product spec. est.
Johnson B	Bandpass	Optec 17132	0.56	440		0.56	1.79	0.25	Product spec.
Johnson V	Bandpass	Optec 17133	0.74	530		0.74	1.34	0.13	Product spec.
Johnson R	Bandpass	Optec 17134	0.49	670		0.49	2.04	0.31	Product spec.
Johnson I	Bandpass	Optec 17135	0.86	840		0.86	1.17	0.07	Product spec.
Solar	Density	Orion O.D. 5 Filter	0.00			0.00	100000.00	5.00	Product sheet
Coronado PST Ha	Bandpass	Coronado	0.00			0.00	100000.00	5.00	Product sheet