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
DECam i 1281.00 7774.20 Víctor M. Blanco 4-meter Telescope Dark Energy Camera DECam i DECam i
DECam r 1276.20 6371.30 Víctor M. Blanco 4-meter Telescope Dark Energy Camera DECam r DECam r
Bw NDWFS k1025 1275.21 4110.78 Nicholas U. Mayall 4-meter Telescope Mosaic Bw NDWFS k1025 Bw NDWFS k1025 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. Note: This filter was called the NDWFS UB filter in 1997-1998.
kp1308b 1272.00 6495.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter nearly mould R-omega
kp1308a 1272.00 6505.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter nearly mould R-omega
Bessell B 1269.00 4326.00 SOAR Telescope Goodman, SOI Bessell B Bessell B 4 x 4 Inches square filters for imaging with the Goodman HTS or with SOI (SOI can also use 3x3 inch filters without vignetting)
kp1267_11 1231.00 6470.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1267_11 mould system R
kp1267_12 1231.00 6470.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1267_12 mould system R
kp1267_13 1208.00 6470.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1267_13 mould system R
kp1267_14 1208.00 6470.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1267_14 mould system R
kp1343 1190.00 6442.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter mould R36 spare R
kp1267_13 1186.00 6450.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1267_13 mould system R
kp1267_12 1186.00 6450.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1267_12 mould system R
kp1265_14 1182.00 4460.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1265_14 mould system
Bessell System k p 1175.00 5470.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters Bessell System k p Bessell System k p
kp1096 1173.00 5446.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1096 video camera
CH4LONG 1172.00 16900.00 Gemini North NIRI CH4LONG CH4LONG
kp1265_11 1152.00 4454.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1265_11 mould system B
CH4SHORT 1151.00 15800.00 Gemini North NIRI CH4SHORT CH4SHORT
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.
kp1306e 1135.00 4430.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1306e nearly mould B-omega
kp180 1134.00 5479.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp180 bessell system revised k p V
kp1308c 1132.00 6400.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter nearly mould R-omega
kp1350c 1128.00 6514.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1350c nearly mould R spectro-film
kp1095 1127.00 4464.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1095 video camera
kp1313b 1127.00 6496.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1313b nearly mould R-omega
kp1348a 1127.00 6517.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1348a nearly mould R spectro-film
kp1307c 1126.00 5477.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1307c nearly mould V-omega
kp1307c 1126.00 5477.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1307c nearly mould V-omega
kp1307c 1126.00 5477.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1307c nearly mould V-omega
kp1307c 1126.00 5477.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1307c nearly mould V-omega
kp1307c 1126.00 5477.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1307c nearly mould V-omega
kp1307b 1120.00 5482.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1307b nearly mould V-omega
kp1307e 1116.00 5480.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1307e nearly mould V-omega
kp1307e 1116.00 5480.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1307e nearly mould V-omega
kp1307e 1116.00 5480.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1307e nearly mould V-omega
kp1307e 1116.00 5480.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1307e nearly mould V-omega
kp1349b 1116.00 6514.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1349b nearly mould R spectro-film
kp1307e 1116.00 5480.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1307e nearly mould V-omega
kp1311b 1115.00 4459.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1311b nearly mould B-omega
kp1307d 1114.00 5470.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1307d nearly mould V-omega
kp1307d 1114.00 5470.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1307d nearly mould V-omega
kp1307d 1114.00 5470.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1307d nearly mould V-omega
kp1307d 1114.00 5470.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1307d nearly mould V-omega
kp1307d 1114.00 5470.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1307d nearly mould V-omega
kp489 1114.00 4453.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp489 video camera
kp1311a 1113.00 4434.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1311a nearly mould B-omega
Washington M 1112.00 5141.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters Washington M Washington M Revised 8/95 (Schott glass)
kp1112 1109.00 5556.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1112 bessell system k p
kp1112 1109.00 5556.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1112 bessell system k p

Updated on June 27, 2022, 11:32 am