Photo Research Product Comparison Table
Features Unit Spectroradiometers Photometers
PR-655 PR-670 PR-680 PR-680L PR-705 PR-715 PR-805 PR-810 PR-810L PR-880 PR-920 PR-905 PR-1530AR
Wavelength Range nm 380 - 780 380 - 1,068 380 - 780 380 -950
Detector   128 Detector Photo Diode Array 256 Detector Photo Diode Array 256 Detector Photo Diode Array + Photomultiplier Tube (PMT) 256 Detector Photo Diode Array + Ultra Sensitive Photomultiplier Tube (PMT) Cooled 256 Detector Photo Diode Array Photomultiplier tube (PMT) 1024 x 1024 CCD Photomultiplier tube (PMT)
Exposure Time ms 3 - 6,000 6 - 30,000 25 - 60,000 N/A 100 - 60,000 30 - 4,000 N/A
Spectral Bandwidth nm 8 (std.) / 5 (opt.) ≥ 2.5 (aperture dependent) N/A
Spectral Accuracy* nm ± 1 ± 2 ± 4 N/A
Wavelength Resolution nm < 3.5 < 2 < 4 N/A
Luminance Accuracy
(2856K)*
% ± 2
Luminance Range
(Illuminant A)*
fl 2E-1 to 30,000 1E-2 to 2,500,000 1E-3 to 5,000,000 7E-5 to 5,000,000 1E-3 to 500 5E-4 to 350 9E-4 to 900 1E-4 to 518,400 1E-6 to 518,400 1E-4 to 1,000,000 5E-1 to 420,000 1E-1 to 30 1E-4 to 100
cd/m2 7E-1 to 103,000 3E-2 to 8,566,000 3E-3 to 17,130,000 2E-4 to 17,130,000 3E-3 to 1,700 15E-4 to 850 3E-3 to 3083 3E-4 to 1, 776,038 3E-6 to 1, 776,038 3E-4 to 3,000,000 17E-2 to 1,400,000 34E-2 to 103 1E-3 to 100,000
Digital Resolution   16 bit 14 bit 10 bit 3 ½ digit
AutoSync Range  Hz 20 - 400  N/A 20 - 400  N/A
Measuring Aperture(s)  

or

0.5° (opt)
1°, 0.5°, 0.25°, 0.125° automated 2°, 1°, 0.5°, 0.25°, 0.125°, 0.5°x1.5°

or

Optional (3° or 2° or 0.5°)
3°, 1°, 0.25°, 0.125°

or

2°, 1°, 0.2°, 0.1°
2°, 1°, 0.5°, 0.25°, 0.125°

or

2°, 1°, 0.5°, 0.25°, 0.125°, 2'(Circular), & 1.0'x40'
N/A

or

1° (opt)
Viewing Field  
(with MS-75)
8.5°
(with MS-55)

(with MS-75)
8.5°
(with MS-55)
11.6° (with MS-60) 7.8° (with MS-50) 9.2° (with MS-55) 
Minimum Measuring Area inch 0.01 with MS-5X Lens 0.001 with MS-5X Lens & 0.125° aperture 0.001 with MS-5X Lens and 0.125° Aper. 0.001 with MS-5X Lens & 0.125° aperture 0.0000472 with OL-50X lens 0.0000275 with OL-10X lens 0.001 with MS-10X Lens and 0.25° Aper.
mm 0.254 0.02 0.0012 0.0007 0.024
Minimum working distance with standard lens inch 14 1.75 14 1.75 0.52 0.24 1.75
mm 356 44 356 44 13 6 44.45
Battery   Rechargeable Nicad. Battery Pack (Optional) Rechargeable Nicad. Battery Pack (Optional) N/A
Interfaces   USB, RS-232 (opt.), Bluetooth (opt.), IEEE488 (opt.)  USB, RS-232 (opt.), Bluetooth (opt.), Analog Output (opt.), IEEE488 (opt.) RS-232, IEEE-488, Parallel USB, RS-232 (opt.), Bluetooth (opt.), Analog Output (opt.), IEEE488 (opt.) RS-232, IEEE-488 RS-232/LVDS Analog, BCD, USB (opt.)
Data Storage   SD Card Internal Flash Storage SD Card Ram Card PC N/A
Mode of operation   Stand alone or PC PC Stand Alone
System Software   SpectraWin™ 2 (opt.) PhotoWin™ 2 (opt.) VideoWin™ 3 N/A
Size (approx.) inch 14" x 7.94" x 3.21" 15" x 6.10" x 7.76" 14" x 7.94" x 3.21" 15" x 6.10" x 7.77" 11.15" x 4.13" x 6.32" 6" x 2.06" x 2.06" 12.5" x 6.25" x 5.75"
mm 355.60 x 201.68 x 81.53 381 x 155 x 197 355.60 x 201.68 x 81.53 381 x 155 x 197 283.2 x 105 x 160.5 152.4 x 52.32 x 52.32 317.5 x 159 x 146
Weight
(approx.)
lb 3.75 4.5 12.5 3.1 9.4 12.6 0.93 8.5
kg 1.7 2.04 5.7 1.4 4.3 5.7 0.42 3.6
Measuring Capabilities   Spectral Radiance, Luminance, Spectral Irradiance, Illuminance, Spectral Radiant Flux, Radiant Intensity, CCT, L*a*b*, L*u*v*, RGB, Dominant Wavelength Spectral Radiance, Luminance, Spectral Irradiance, Illuminance, Spectral Radiant Flux, Radiant Intensity, CCT, L*a*b*, L*u*v*, RGB, Dominant Wavelength, Display Contrast, Response Time Spectral Radiance, Luminance, Spectral Irradiance, Illuminance, Spectral Radiant Flux, Radiant Intensity, CCT Luminance, Illuminance, luminous intensity, Luminous Flux, Display Contrast, Response Time Luminance, Illuminance, luminous intensity, Tristimulus colorimetry, CCT, L*a*b*, L*u*v* Luminance, CIE Chromaticity Spot Size, line profile, convergence, Flicker, Jitter, Geometric Distortion Luminance, Line profile, convergence, Flicker, Jitter, Geometric Distortion NVIS, Luminance, Radiance, Illuminance, irradiance, CIE chromaticity
* All specifications are subject to change without notice.