


The standard filter size for the 0.9-m and 1.5-m CFCCD is 3x3 inch, which are mounted in two filter wheels which each can hold up to 8 filters (or 7 plus clear). We have a single wheel which can hold up to 5 4x4 inch filters which can be installed in place of one of the 8-position wheels. At the Schmidt, and the 4-m PFCCD (now retired) 4x4 inch filters are required in order to avoid vignetting. We do have adaptors to allow the use of smaller filters (eg 2x2 inch), if the vignetting is tolerable, but see the warning note at the head of the filter list. The BTC and Mosaic II imagers, used at the 4-m prime focus, take filters 5.75 x 5.75 inches (146x146 mm) and nominally 12 mm thick.
FILTER | SIZE | Thick | Cent | fwhm | Trans | FILTER SET | Filter curves | COMMENTS | |
/width | (") | (mm.) | (A) | (A) | (%) | Plot |
Data file |
||
3513/628 | 4X4 | SDSS u | |||||||
3530/280 | 4x4 | 9.15 | 3530 | 280 | 37.14 | u Stromgren | |||
3570/660 | 3x3 | 3570 | 660 | 80.59 | U liq. CuSO4 Tek set #2 | ||||
3575/600 | 3x3 | 9.09 | 3575 | 600 | 74.21 | U liq. CuSO4 Tek set #1 | |||
3580/610 | 4x4 | 9.32 | 3580 | 610 | 74.66 | U liq. CuSO4 set#1 4mts | |||
36237605 | 3x3 | 8.83 | 3623 | 605 | 67.66 | U liq. CuSO4 Tek set#3 | |||
3960/100 | 4x4 | Ca H&K line filter | |||||||
3996/1042 | 3x3 | 8.11 | 3996 | 1042 | 62.70 | C Wash | |||
4000/1030 | 4x4 | 8.45 | 4000 | 1030 | 62.45 | C Wash | |||
4118/146 | 4x4 | 9.87 | 4118 | 146 | 52.04 | v Stromgren 4x4 | |||
4185/1030 | 4x4 | 5.40 | 4185 | 1030 | 70.44 | B Harris set#1 4mts | |||
4202/1050 | 3x3 | 4200 | 1050 | 66.16 | B Tek set#2 | ||||
4203/1050 | 3x3 | 5.26 | 4200 | 1050 | 66.72 | B Tek set#3 | |||
4201/1050 | 3x3 | 5.17 | 4200 | 1050 | 66.48 | B Tek set#1 | |||
4340/980 | 3x3 | 6.38 | 4341 | 980 | 60.33 | B Harris set 1 | |||
4357/1665 | 4x4 | 3.65 | 4357 | 1665 | 88.19 | B Tyson "J" | |||
4345/980 | 3x3 | 6.33 | 4345 | 980 | 60.85 | B Harris set 2 | |||
4200/1050 | 4x4 | B set# 2 Schmidt | |||||||
4697/196 | 4x4 | 9.85 | 4697 | 196 | 71.27 | b Str"m. 4x4 | |||
4759/1430 | 4x4 | SDSS g | |||||||
4940/700 | 4x4 | 8.95 | 4920 | 670 | 93.09 | Gunn g | |||
5025/1023 | 3x3 | 8.08 | 5025 | 1023 | 88.60 | M Wash. | |||
5019/50 | 4x4 | 7.83 | 5027 | 50 | 79.48 | ||||
5040/990 | 4x4 | 8.25 | 5040 | 990 | 88.23 | M Wash. | |||
5118/900 | 3x3 | 5.05 | 5118 | 900 | 81.39 | g Gunn-T | |||
5130/155 | 4x4 | 7.76 | 5121 | 133 | 84.13 | DDO 51 Wash. set | |||
5295/1590 | 4x4 | 5.24 | 5292 | 1625 | 90.66 | HST "V" | |||
5362/895 | 3x3 | 6.14 | 5362 | 895 | 76.80 | V Harris set 1 | |||
5370/900 | 3x3 | 6.18 | 5370 | 900 | 75.64 | V Harris set 2 | |||
5438/1026 | 3x3 | 5438 | 1026 | 91.91 | V Tek set#2 | ||||
5443/1060 | 4x4 | V set#2 Schmidt | |||||||
5443/1060 | 4x4 | 5.12 | 5443 | 1060 | 88.50 | V Harris set#1 4mts | |||
5475/1000 | 3x3 | 5475 | 1000 | 87.71 | V Tek set #1 | ||||
5497/241 | 4x4 | 9.74 | 5478 | 244 | 70.83 | y Str"m. 4x4 | |||
6120/140 | 3x3 | 7.97 | 6115 | 135 | 85.89 | Supernova | |||
6130/590 | 4x4 | 8.35 | 6130 | 590 | 56.19 | T1 Wash. | .9% leak at 1.2u. | ||
6152/625 | 3x3 | 8.21 | 6152 | 625 | 58.06 | T1 Wash. | 1% leak at 1.0u. | ||
6265/1483 | 4x4 | SDSS r | |||||||
6410/1470 | 3x3 | 5.23 | 6410 | 1470 | 81.76 | R Tek set#3 | |||
642571500 | 3x3 | 5.25 | 6425 | 1500 | 79.69 | R Tek set#1 | |||
6437/1525 | 4x4 | 5.22 | 6437 | 1525 | 81.38 | R harris set#1 4mts | |||
6437/1525 | 4x4 | R set #2 Schmidt | |||||||
6400/1450 | 3x3 | 6400 | 1450 | 81.09 | R Tek set #2 | ||||
6475/1600 | 3x3 | 6.18 | 6475 | 1600 | 81.70 | R Harris set 1 | |||
6493/1445 | 3x3 | 6.15 | 6493 | 1445 | 77.00 | R Harris set 2 | |||
6560/900 | 4x4 | 9.19 | 6495 | 900 | 94.95 | Gunn r | |||
656375-3 | 3x3 | 5.61 | 6559 | 64 | 89.37 | ||||
656375-4 | 4x4 | 5.54 | 6567 | 68 | 82.32 | ||||
660075-3 | 3x3 | 5.57 | 6598 | 69 | 87.77 | ||||
660075-4 | 4x4 | 5.57 | 6600 | 67 | 84.77 | ||||
6728/1000 | 3x3 | 5.05 | 6728 | 1000 | 93.83 | r Gunn-T | |||
6738/50 | 4x4 | 7.97 | 6744 | 50 | 87.83 | ||||
7734/50 | 4x4 | SDSS i | |||||||
8120/1500 | 4x4 | 9.22 | 8065 | 1600 | 86.60 | Gunn i | |||
8067/1485 | 3x3 | 6.11 | 8067 | 1485 | 95.49 | I kc Tek set#3 | |||
8075/1500 | 3x3 | 6.13 | 8075 | 1500 | 95.53 | I kc Tek set#1 | |||
8075/1500 | 4x4 | 6.19 | 8075 | 1500 | 94.09 | I kc set#1 4mts | |||
8118/1415 | 3X3 | 8118 | 1415 | 96.63 | I kc Tek set#2 | ||||
8100/1500 | 3X3 | 5.08 | 8100 | 1500 | 93.00 | I Gunn-T | |||
8300/2500 | 4x4 | 5.43 | 8310 | 2560 | 98.73 | HST "I" | |||
9100/1400 | 4x4 | SDSS z | |||||||
9100/1400 | 4x4 | z Gunn | |||||||
9100/1400 | 3x3 | z Gunn |