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MidOpt DB Series Filter DB550/850

Uniforce Product

Salient Features

Dual Bandpass  Green +  850nm NIR

New The DB550/850 compliments the DB660/850 and DB475/850 filters. When modifying a single color camera by removing its IR blocking filter, incorporation of this filter in its place allows reflected near-infrared light (850nm) to be captured in the camera sensor’s red channel and reflected green light (550nm) to be captured in the sensor’s green channel (the blue channel is not used). Healthy vegetation will absorb (not reflect) green light and strongly reflect near-infrared light. Thus this information can then be used to apply a false color gradient to images to better highlight the contrast between regions of healthy vegetation vs. areas with stressed, diseased or no vegetation.

db550_db880 Midopt Filter graph

DB550/850 Dual Bandpass Green + 850nm NIR

  • Useful Range : 535-565nm, 830-870nmdb550_db880 Midopt Filter diagram
  • FWHM : 45nm, 50nm
  • Tolerance : +/-5
  • Minimum Peak Transmission : ≥85%
  • Surface Quality : 40/20
  • Compatible LED: 548nm, 840nm, 850nm

The performance of a filter is based on what happens to light passing through the filter. The apparent color of light reflected off the surface is not a reliable way to judge the filter’s capabilities. Batch-to-batch difference in the apparent color of the coatings or filter substrates can often be easily seen when looking at two examples of the same filter type. The color of the coating does not indicate a disparity in performance.

Transmission DataAvailable MountsLearn MoreQuote Request

DB550/850 Transmission Data

wavelength transmission wavelength transmission
(nm) (%) (nm) (%)
1100 0.60 720 0.01
1090 0.27 710 0.01
1080 0.16 700 0.01
1070 0.11 690 0.03
1060 0.11 680 0.09
1050 0.14 670 0.05
1040 0.21 660 0.15
1030 0.32 650 0.25
1020 0.36 640 0.11
1010 0.39 630 0.22
1000 0.51 620 0.06
990 0.48 610 0.05
980 0.31 600 0.16
970 0.22 590 0.12
960 0.32 580 0.45
950 0.33 570 21.57
940 0.18 560 81.81
930 0.10 550 90.87
920 0.14 540 91.96
910 0.32 530 90.42
900 1.07 520 53.57
890 11.04 510 0.67
880 62.85 500 0.06
870 91.07 490 0.09
860 91.34 480 0.08
850 92.56 470 0.07
840 88.38 460 0.06
830 27.83 450 0.01
820 0.74 440 0.00
810 0.05 430 0.06
800 0.01 420 0.34
790 0.00 410 0.02
780 0.00 400 0.03
770 0.00 390 0.01
760 0.03 380 0.25
750 0.05 370 1.48
740 0.08 360 0.03
730 0.04 350 0.00

Available Mounts

Threaded Mount

  • Designed for lenses with filter threads, a variety of filter types and stock threaded sizes are available: M13.25-M105
  • Larger sizes, 62mm to 105mm, are made to order and are not returnable
  • Custom thread sizes are available upon request.
  • Threaded mounts are available as black anodized aluminum rings. Rotating mounts with locking thumb screws are generally provided.

Ordering Example:

  • Filter: BP470
  • Mount Size: M27

Correct Part# is:

  • BP470-27

Threaded Mount Technical Drawing PDF

Slip Mount

  • Designed for varifocal lenses, wide angle lenses and lenses without filter threads
  • Accommodates standard threaded mounts
  • Low profile and oversize diameter design prevents wide angle lens vignetting
  • Locking set screws and a wrench are provided to secure the adapter to the lens
  • Many varifocal and shorter fixed focal length (wide angle) lenses are not supplied with filter threads due to the presence of a protruding, strongly convex lens element. Our slip mount adapters allow standard threaded filters to be fitted securely to these and a large variety of lenses that do not have filter threads provided.

Ordering Example:

  • Filter: BP470
  • Outside Diameter of Lens in mm: 43mm

Correct Part# is:

  • BP470-S43

Slip Mount Technical Drawing PDF

C/CS Camera Mount

midopt-c-mount

  • Designed to thread directly into any C/CS mount camera between the lens and sensor
  • Wrenching slots aid in threading the filter into the camera body. A wrench is supplied with each filter.
  • Helpful in applications with space constraints
  • Can be used with wide angle lenses that do not accept filters at the front end to prevent vignetting
  • C/CS mount filters are available in a standard 1mm thickness

Ordering Example: 

  • Filter: BP470
  • Mount Size: 25.4

Correct Part# is:

  • BP470-25.4

C/CS Camera Mount Technical Drawing PDF

 Unmounted  & Custom Size

midopt-unmounted

  • Any MidOpt filter type can be provided as an Unmounted filter
  • Custom shapes and sizes are typically fabricated with one day to two week lead times
  • Custom filter types with longer lead times can also be quoted. Please contact us regarding feasibility.

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