CTIO 3x3-inch and 4x4-inch Filters

The standard filter size for the 0.9-m is 3x3 inch and 4x4 inch. No other filter sizes available.

There are two filter wheels that can hold up to 8 3x3 inches filters (or 7 plus clear), and one filter wheel which can hold up to 5 4x4 inch filters. 

We do have adaptors to allow the use of 3x3 inches in the 4x4 inch filter wheel.

If you are an observer looking for a filter not listed here, there is a chance that it can be lent from SOAR, please contact your Scientific Observer Support.

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 gif txt  
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 gif txt  
3580/610 4x4 9.32 3580 610 74.66 U liq. CuSO4 set#1 4mts gif txt  
36237605 3x3 8.83 3623 605 67.66 U liq. CuSO4 Tek set#3 gif txt  
3960/100 4x4         Ca H&K line filter - -  
3996/1042 3x3 8.11 3996 1042 62.70 C Wash gif -  
4000/1030 4x4 8.45 4000 1030 62.45 C Wash gif -  
4118/146 4x4 9.87 4118 146 52.04 v Stromgren 4x4 gif txt  
4185/1030 4x4 5.40 4185 1030 70.44 B Harris set#1 4mts gif -  
4202/1050 3x3   4200 1050 66.16 B Tek set#2 gif -  
4203/1050 3x3 5.26 4200 1050 66.72 B Tek set#3 gif -  
4201/1050 3x3 5.17 4200 1050 66.48 B Tek set#1 gif -  
4357/1665 4x4 3.65 4357 1665 88.19 B Tyson "J" gif -  
4200/1050 4x4         B set# 2 Schmidt - -  
4697/196 4x4 9.85 4697 196 71.27 b Strom.  4x4 gif txt  
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. gif -  
5019/50 4x4 7.83 5027 50 79.48   gif txt  
5040/990 4x4 8.25 5040 990 88.23 M Wash. gif txt  
5118/900 3x3 5.05 5118 900 81.39 g Gunn-T gif txt  
5130/155 4x4 7.76 5121 133 84.13 DDO 51 Wash. set gif -  
5295/1590 4x4 5.24 5292 1625 90.66 HST "V" gif -  
5438/1026 3x3   5438 1026 91.91 V Tek set#2 gif -  
5443/1060 4x4         V set#2 Schmidt - -  
5443/1060 4x4 5.12 5443 1060 88.50 V Harris set#1 4mts gif -  
5475/1000 3x3   5475 1000 87.71 V Tek set #1 gif -  
5497/241 4x4 9.74 5478 244 70.83 y Str"m. 4x4 gif -  
6120/140 3x3 7.97 6115 135 85.89 Supernova gif -  
6130/590 4x4 8.35 6130 590 56.19 T1 Wash. gif - .9% leak at 1.2u.
6152/625 3x3 8.21 6152 625 58.06 T1 Wash. gif - 1% leak at 1.0u.
6265/1483 4x4         SDSS r - -  
6410/1470 3x3 5.23 6410 1470 81.76 R Tek set#3 gif -  
642571500 3x3 5.25 6425 1500 79.69 R Tek set#1 gif -  
6437/1525 4x4 5.22 6437 1525 81.38 R harris set#1 4mts gif -  
6437/1525 4x4         R set #2 Schmidt - -  
6400/1450 3x3   6400 1450 81.09 R Tek set #2 gif -  
6560/900 4x4 9.19 6495 900 94.95 Gunn r gif -  
656375-3 3x3 5.61 6559 64 89.37 Halpha gif -  
656375-4 4x4 5.54 6567 68 82.32 Halpha gif -  
660075-3 3x3 5.57 6598 69 87.77   gif -  
660075-4 4x4 5.57 6600 67 84.77   gif -  
6728/1000 3x3 5.05 6728 1000 93.83 r Gunn-T gif -  
6738/50 4x4 7.97 6744 50 87.83 SII gif -  
7734/50 4x4         SDSS i - -  
8120/1500 4x4 9.22 8065 1600 86.60 Gunn i gif -  
8067/1485 3x3 6.11 8067 1485 95.49 I kc Tek set#3 gif -  
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 gif -  
8118/1415 3X3   8118 1415 96.63 I kc Tek set#2 gif -  
8100/1500 3X3 5.08 8100 1500 93.00 I Gunn-T gif -  
8300/2500 4x4 5.43 8310 2560 98.73 HST "I" gif -  
9100/1400 4x4         SDSS z - -  
9100/1400 4x4         z Gunn - -  
9100/1400 3x3         z Gunn - -