LA120
Light Balancing Filter
(minus blue EXTRA)

Recommended for use with white 6500ºK LEDs

Use with white LEDs
After considerable testing, we found these single substrate, hard-coated filters to be preferred for use with white LED lighting when accurate color rendering is desired. White LEDs typically have a steep blue "spike" that results in a strong overall bluish cast to the subject being illuminated. Not only can this be disconcerting, poor color rendition may result in difficulties in some color inspection applications.

While there currently are “warm white” LED lighting options available, they are significantly more expensive, have significantly lower output, a shorter lifetime, and often a slight bluish tint still remains. Using only an LA120 filter over the camera lens with standard, less expensive white LEDs works just as well and is far more cost effective.

This same benefit can be seen when using an LA120 filter in subjects illuminated with some metal halide and mercury lighting as well. 

Example:

(left) 6500ºK LEDs put out a lot of blue.
(right) LA120 limits the blue cast for accurate hue and brightness.

More examples

Download Excel Spreadsheet with data and curve for this filter.

Standard Threaded Mounts:
We offer standard filter sizes from stock – 22.5mm to 62mm – for same- or next-day shipping. Larger filters – 67mm to 105mm – are made to order and are normally not returnable.

Click here for PDF drawing of standard mounts

Slip Mounts:
If your lens does not have threads for mounting a filter, Slip Mount adapters are available. Slip Mounts can attach a regular filter to a lens or attach a very large filter to accommodate a wide angle lens. Please call to order Slip Mount adapters.

C-Mounts:
3mm thick threaded mount for adding a filter between lens and camera
Click here for PDF drawing of c-mounts

Transmission chart (typical)
Passes 500nm+
Absorbs UV and blue 200-500nm
Reduces 400-500nm

1100
1090
1080
1070
1060
1050
1040
1030
1020
1010

1000
990
980
970
960
950
940
930
920
910

900
890
880
870
860
850
840
830
820
810

800
790
780
770
760
750
740
730
720
710

700
690
680
670
660

93.17
93.16
93.16
93.10
93.18
93.19
93.12
93.14
93.09
93.02

93.00
92.98
92.86
92.62
92.46
92.18
91.84
91.43
90.89
90.10

89.34
88.25
87.18
86.03
84.26
82.79
81.12
79.40
77.89
76.58

75.44
73.42
73.79
73.69
73.69
74.23
75.06
76.15
77.63
79.29

80.98
82.79
84.26
85.52
86.34

650
640
630
620
610
600
590
580
570
560

550
540
530
520
510
500
490
480
470
460

450
440
430
420
410
400
390
380
370
360

350
340
330
320
310
300
290
280
270
260

250
240
230
220
210

86.84
86.70
86.20
85.05
83.29
80.99
77.97
74.64
70.54
66.11

61.13
56.26
51.47
47.31
43.97
41.56
39.97
38.96
38.25
37.13

34.99
31.30
25.86
19.29
12.78
7.69
4.45
2.73
1.96
1.73

1.79
1.79
1.37
0.76
0.28
0.04
0.00
0.00
0.00
0.00

0.00
0.00
0.00
0.00
0.00