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.)

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NOIRLab Filter Database

Filter FWHM (Å) CWL (Å) Telescope Instrument Plot Data Comments
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.
SII 50.00 6744.00 WIYN 3.5-meter Telescope Hydra SII SIZE: 4x4-7.97mm.
N/A 50.00 5027.00 WIYN 3.5-meter Telescope Hydra N/A SIZE: 4x4-7.83mm.
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)
5019/50 50.00 5027.00 SMARTS Consortium: 0.9-meter Telescope BLANK 5019/50 5019/50 Size: 4x4 Thick: 7.83
OVIC_G0346 50.00 6790.00 Gemini North GMOS-N OVIC_G0346 OVIC_G0346
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)
N/A 50.00 5027.00 WIYN 3.5-meter Telescope Hydra N/A SIZE: 4x4-7.83mm.
[O III] -2 49.00 5011.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters [O III] -2 [O III] -2 new 10/2011
kp1241 49.00 5379.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1241 video camera
kp1242 49.00 5425.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1242 video camera
OIII_G0318 47.00 4990.00 Gemini North GMOS-N OIII_G0318 OIII_G0318
kp1239 47.00 5281.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1239 video camera
kp1238 46.00 5227.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1238 video camera
kp273 46.00 9073.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp273 s III
[O III] 45.00 5008.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters [O III] [O III]
kp1524 45.00 10843.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1524
SII_G0335 44.00 6720.00 Gemini South GMOS-S SII_G0335 SII_G0335
OIII_G0338 44.00 4990.00 Gemini South GMOS-S OIII_G0338 OIII_G0338
kp1206 43.00 4374.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter
kp1119 42.00 3927.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter k line
wrc4 WR CIV k1024 41.79 5828.71 Nicholas U. Mayall 4-meter Telescope Mosaic wrc4 WR CIV k1024 wrc4 WR CIV k1024 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.
kp1120 41.00 4042.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1120
kp816 39.00 9561.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp816
kp1548 39.00 3736.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters kp1548 kp1548 Replaces 1277 1278; damaged coating?
kp810 39.00 6569.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp810 h alpha system
BTFI_6745/38 BTFI 38.50 6745.00 SOAR Telescope SAM, SAMI
BTFI 6745 / 38 38.50 6745.00 SOAR Telescope SAM, SAM-FP
kp1276a 36.00 6566.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1276a
kp1276 35.00 6565.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1276 nebular set
Stromgren u 34.00 3467.00 WIYN 0.9-meter Telescope S2KB Stromgren u Stromgren u 01-2013
H-alpha 32.00 6565.00 Gemini South ZORRO H-alpha H-alpha not convolved with dichroic
H-alpha 32.00 6565.00 Gemini North ALOPEKE H-alpha H-alpha not convolved with dichroic
kp265 32.00 7138.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp265 bad wavy surface
kp1225 31.00 4885.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1225 video camera
kp1547 31.00 5010.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1547 o III
kp947 30.00 3630.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter o II
Hb-narrow 30.00 4854.00 WIYN 0.9-meter Telescope S2KB Hb-narrow Hb-narrow 01-2013
H-alpha narrow 29.00 6560.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters H-alpha narrow H-alpha narrow has red leak
kp1434 29.00 6569.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1434 halpha replaces kp810
KP1519 28.91 6550.15 Nicholas U. Mayall 4-meter Telescope KOSMOS KP1519 KP1519 KOSMOS Approved KPNO 4in. Filter.
kp272 28.00 5002.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp272 nebular set 183 sub
kp1272 28.00 4860.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1272 nebular set
kp1273 28.00 4865.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1273 h beta system
[S III] 27.00 9545.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters [S III] [S III] George Jacoby's filter
SAMI [SII] Narrow 27.00 6738.00 SOAR Telescope SAM, SAM-FP
SAMI-[SII]6738 Narrow 27.00 6738.00 SOAR Telescope SAM, SAMI SAMI-[SII]6738 Narrow
kp859 26.00 6723.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp859
kp1522 25.00 4371.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1522 replaces kp1206
kp1522 25.00 4371.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1522 replaces kp1207

Updated on June 27, 2022, 11:32 am