SP675
Deep Red/NIR Dichroic
Blocking Filter

The single substrate, hard-coated SP675 filter blocks some of the red and near infrared (IR) portions of the spectrum. Substrate glass is 1mm thick, as it is often the filter of choice for camera manufacturers for assembly immediately above a CCD or CMOS sensor.

Compared with standard IR blocking filters offered by all other companies, IR blocking of the SP675 is far superior – averaging better than 99.99% from 700-925nm – and the transition at the cut-off point is particularly steep, making the SP675 filter an excellent value. We know of NO other filter manufacturer offering camera filters with this sort of performance.

Download Excel Spreadsheet with data and curve for this filter.

Examples of filter effectiveness.

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 380-670nm
Reflects 680-1080nm

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

56.15
82.40
47.03
31.73
14.84
4.01
1.70
1.02
0.78
0.66

0.38
0.25
0.12
0.13
0.12
0.04
0.08
0.11
0.05
0.09

0.00
0.00
0.01
0.00
0.00
0.00
0.00
0.00
0.00
0.01

0.01
0.00
0.00
0.01
0.00
0.01
0.01
0.00
0.00
0.05

0.30
1.76
16.40
89.67
85.44

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

92.97
90.80
86.01
92.35
86.90
93.28
93.48
91.72
89.42
93.15

85.06
92.51
92.82
91.01
91.03
89.45
91.21
76.66
79.29
90.99

88.37
89.33
91.09
85.22
6.78
83.59
81.34
61.86
26.97
0.02

0.01
0.02
0.00
0.01
0.01
0.00
0.00
0.00
0.00
0.00

0.00
0.00
0.00
0.00
0.00