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Filter Information

Plots and data included with most lists.

Instructions for Fast Beam Simulations

Glass Filter Spectral Transmission Curves from Schott Catalog (reproduced with permission from Schott Glass Technologies, Inc.)

Filter Loan Request Form - PDF fill-in form (if using Adobe Reader).   Or, use the MS-Word version.
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NOIRLab Filter Database

Filter FWHM (Å) CWL (Å) Telescope Instrument Plot Data Comments
M Wash. 1023.00 5025.00 WIYN 3.5-meter Telescope Hydra SIZE: 3x3-08.08mm.
M Wash. 5025/1023 1023.00 5025.00 SMARTS Consortium: 0.9-meter Telescope BLANK M Wash. 5025/1023 Size: 3x3 Thick: 8.08
M Wash. 5040/990 990.00 5040.00 SMARTS Consortium: 0.9-meter Telescope BLANK M Wash. 5040/990 M Wash. 5040/990 Size: 4x4 Thick: 8.25
M Washington c6007 1020.00 5020.00 Nicholas U. Mayall 4-meter Telescope Mosaic M Washington c6007 M Washington c6007 Note: The central wavelength of CTIO Mosaic narrow band filters (actually all filters, but is very significant for narrow band filters) is shifted ~15A to the BLUE in the f/2.87 beam of the Blanco 4m + PFADC corrector as compared to the transmission measured in parallel light. The central wavelength quoted below is nominally for when the filter is used at PF, with the ~15A shift included. Furthermore, the filter transmission curve presented below shows the simulated filter transmission curve for the Blanco 4m + PFADC f/2.87 beam.
M Washington k1007 1140.00 5100.00 Nicholas U. Mayall 4-meter Telescope Mosaic M Washington k1007 M Washington k1007 Note that there is a shift in central wavelength when placed in different f/ratio beams. At the KPNO 4meter f/3.1 beam this corresponds to a shift of approximately 12 Angstroms bluer; at the CTIO 4meter f/2.9 this corresponds to a shift of approximately 15 Angstroms bluer; at the WIYN 0.9m f/7.9 this corresponds to a shift of approximately 5 Angstroms bluer. See plot at the bottom of the page.
M Washington k1007 Nicholas U. Mayall 4-meter Telescope Mosaic M Washington k1007 M Washington k1007 Below is a plot of the transmission of this filter when used at telescopes with differing focal ratios and central obscurations; the KPNO 4m (f/3.1), the CTIO 4m (f/2.9), and the WIYN 0.9m (f/7.9). At the KPNO 4m f/3.1 the properties of this filter are: CWL=5168A, FWHM=1126A, PEAK TRANSMISSION=86.5%.
M1930 Gemini South Phoenix M1930 Start (cm-1 μm): 1890=5.291 - Stop (cm-1 μm): 1970=5.076 - Echelle order 11
M2030 Gemini South Phoenix M2030 Start (cm-1 μm): 1980=5.050 - Stop (cm-1 μm): 2080=4.808 - Echelle order 11
M2150 Gemini South Phoenix M2150 Start (cm-1 μm): 2105=4.751 - Stop (cm-1 μm): 2190=4.566 - Echelle order 12
Mike Irvin's Z 0.00 8525.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters Mike Irvin's Z Mike Irvin's Z
Mould I 2111.00 8268.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters Mould I Mould I made with Mould parameters
Mould I 1995.00 8270.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters Mould I Mould I Many pinholes, spare - Not available
MPRIME 2411.00 46800.00 Gemini North NIRI MPRIME MPRIME
N/A 50.00 5027.00 WIYN 3.5-meter Telescope Hydra N/A SIZE: 4x4-7.83mm.
N/A 69.00 6598.00 WIYN 3.5-meter Telescope Hydra N/A SIZE: 3x3-5.57mm.
N/A 67.00 6600.00 WIYN 3.5-meter Telescope Hydra N/A SIZE: 4x4-5.57mm.
N/A 69.00 6598.00 WIYN 3.5-meter Telescope Hydra N/A SIZE: 3x3-5.57mm.
N/A 67.00 6600.00 WIYN 3.5-meter Telescope Hydra N/A SIZE: 4x4-5.57mm.
N/A 50.00 5027.00 WIYN 3.5-meter Telescope Hydra N/A SIZE: 4x4-7.83mm.
narrow [OIII] (CTIO set) 50.00 5019.00 SOAR Telescope Goodman, SOI 4 x 4 Inches square filters for imaging with the Goodman HTS or with SOI (SOI can also use 3x3 inch filters without vignetting)
narrow [S II] (CTIO set) 50.00 6738.00 SOAR Telescope Goodman, SOI narrow [S II] (CTIO set) narrow [S II] (CTIO set) 4 x 4 Inches square filters for imaging with the Goodman HTS or with SOI (SOI can also use 3x3 inch filters without vignetting)
narrow Halpha (CTIO set) 75.00 6563.00 SOAR Telescope Goodman, SOI narrow Halpha (CTIO set) narrow Halpha (CTIO set) 4 x 4 Inches square filters for imaging with the Goodman HTS or with SOI (SOI can also use 3x3 inch filters without vignetting)
narrow Halpha 6600 (CTIO set) 75.00 6600.00 SOAR Telescope Goodman, SOI 4 x 4 Inches square filters for imaging with the Goodman HTS or with SOI (SOI can also use 3x3 inch filters without vignetting)
o2 OII c6012 50.00 3727.00 Nicholas U. Mayall 4-meter Telescope Mosaic o2 OII c6012 o2 OII c6012 Note: The central wavelength of CTIO Mosaic narrow band filters (actually all filters, but is very significant for narrow band filters) is shifted ~15A to the BLUE in the f/2.87 beam of the Blanco 4m + PFADC corrector as compared to the transmission measured in parallel light. The central wavelength quoted below is nominally for when the filter is used at PF, with the ~15A shift included. Furthermore, the filter transmission curve presented below shows the simulated filter transmission curve for the Blanco 4m + PFADC f/2.87 beam.
o3 OIII c6014 50.00 4990.00 Nicholas U. Mayall 4-meter Telescope Mosaic o3 OIII c6014 o3 OIII c6014 Note: The central wavelength of CTIO Mosaic narrow band filters (actually all filters, but is very significant for narrow band filters) is shifted ~15A to the BLUE in the f/2.87 beam of the Blanco 4m + PFADC corrector as compared to the transmission measured in parallel light. The central wavelength quoted below is nominally for when the filter is used at PF, with the ~15A shift included. Furthermore, the filter transmission curve presented below shows the simulated filter transmission curve for the Blanco 4m + PFADC f/2.87 beam.
O3 OIII N2 k1014 * 55.55 5024.90 Nicholas U. Mayall 4-meter Telescope Mosaic O3 OIII N2 k1014 * O3 OIII N2 k1014 * Note that there is a shift in central wavelength when placed in different f/ratio beams. At the KPNO 4meter f/3.1 beam this corresponds to a shift of approximately 12 Angstroms bluer; at the CTIO 4meter f/2.9 this corresponds to a shift of approximately 15 Angstroms bluer; at the WIYN 0.9m f/7.9 this corresponds to a shift of approximately 5 Angstroms bluer. See the plot at the bottom of the page.
O3 OIII N2 k1014 * Nicholas U. Mayall 4-meter Telescope Mosaic O3 OIII N2 k1014 * O3 OIII N2 k1014 * Below is a plot of the transmission of this filter when used at telescopes with differing focal ratios and central obscurations; the KPNO 4m (f/3.1), the CTIO 4m (f/2.9), and the WIYN 0.9m (f/7.9). At the KPNO 4m f/3.1 the properties of this filter are: CWL=5006A, FWHM=56A, PEAK TRANSMISSION=76%.
OCLI K Band Filter Nicholas U. Mayall 4-meter Telescope Flamingos OCLI K Band Filter OCLI K Band Filter Cuton: 2.028 - Cutoff: 2.365
OG-515b 0.00 0.00 Nicholas U. Mayall 4-meter Telescope RC Spectrograph OG-515b OG-515b Sharp-Cut Filter. Cutoff filter: no transmission peak, FWHM is undefined.
OG-530 0.00 0.00 KPNO 2.1-meter Telescope GoldCam OG-530 OG-530 Sharp-Cut Filter. Cutoff filter: no transmission peak, FWHM is undefined.
OG-530 0.00 0.00 Nicholas U. Mayall 4-meter Telescope RC Spectrograph OG-530 OG-530 Sharp-Cut Filter. Cutoff filter: no transmission peak, FWHM is undefined.
OG-550 0.00 0.00 KPNO 2.1-meter Telescope GoldCam OG-550 OG-550 Sharp-Cut Filter. Cutoff filter: no transmission peak, FWHM is undefined.
OG-550b 0.00 0.00 Nicholas U. Mayall 4-meter Telescope RC Spectrograph OG-550b OG-550b Sharp-Cut Filter. Cutoff filter: no transmission peak, FWHM is undefined.
OG-570 0.00 0.00 Nicholas U. Mayall 4-meter Telescope RC Spectrograph OG-570 OG-570 Sharp-Cut Filter. Cutoff filter: no transmission peak, FWHM is undefined.
OG-570 0.00 0.00 KPNO 2.1-meter Telescope GoldCam OG-570 OG-570 Sharp-Cut Filter. Cutoff filter: no transmission peak, FWHM is undefined.
OG-590 5900.00 SOAR Telescope Goodman Goodman Spectrograph circular 4 inch diameter filters - Cutoff wavelength: < 590
OG-590b 0.00 0.00 Nicholas U. Mayall 4-meter Telescope RC Spectrograph OG-590b OG-590b Sharp-Cut Filter. Cutoff filter: no transmission peak, FWHM is undefined.
OG515 BLANK Hydra, Hydra Schott Glass OG515 Schott Glass Filters. Purpose: Longpass > ~515nm Thickness: 2mm
OG515_G0306 0.00 0.00 Gemini North GMOS-N OG515_G0306 OG515_G0306
OG515_G0330 0.00 0.00 Gemini South GMOS-S OG515_G0330 OG515_G0330
OG570 BLANK Hydra, Hydra Schott Glass OG570 Schott Glass Filters. Purpose: Longpass > ~570nm Thickness: 2mm
OG570 0.00 5675.00 Nicholas U. Mayall 4-meter Telescope KOSMOS OG570 OG570 KOSMOS dedicated blocker
OG590 BLANK Hydra, Hydra Schott Glass OG590 Schott Glass Filters. Purpose: Longpass > ~590nm Thickness: 2mm
OIII_G0318 47.00 4990.00 Gemini North GMOS-N OIII_G0318 OIII_G0318
OIII_G0338 44.00 4990.00 Gemini South GMOS-S OIII_G0338 OIII_G0338
OIIIC_G0319 77.00 5140.00 Gemini North GMOS-N OIIIC_G0319 OIIIC_G0319
OIIIC_G0339 87.00 5140.00 Gemini South GMOS-S OIIIC_G0339 OIIIC_G0339
Ooff OIII+30nm k1015 242.69 5317.54 Nicholas U. Mayall 4-meter Telescope Mosaic Ooff OIII+30nm k1015 Ooff OIII+30nm k1015 Note that there is a shift in central wavelength when placed in different f/ratio beams. At the KPNO 4meter f/3.1 beam this corresponds to a shift of approximately 12 Angstroms bluer; at the CTIO 4meter f/2.9 this corresponds to a shift of approximately 15 Angstroms bluer; at the WIYN 0.9m f/7.9 this corresponds to a shift of approximately 5 Angstroms redder. See the plot at the bottom of the page.
Ooff OIII+30nm k1015 Nicholas U. Mayall 4-meter Telescope Mosaic Ooff OIII+30nm k1015 Ooff OIII+30nm k1015 Below is a plot of this filter as simulated in different f/ratio beams.At the KPNO 4m f/3.1 the properties of this filter are: CWL=5298.69A FWHM=240.20A PEAK TRANSMISSION=91.73%
ORDER_1 17706.00 52900.00 Gemini North GNIRS ORDER_1 ORDER_1
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Updated on June 27, 2022, 11:32 am