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Product comparison chart
Photo Research Product Comparison Table
Features Unit PR-650 PR-655 PR-670 PR-680 PR-705 PR-715 PR-880 PR-920 PR-1980B PR-1530AR
Spectral Range nm 380- 780 380-780 380-780 380-780 380- 780 380- 1,068 N/A N/A 360 - 860 N/A
Detector   128 Element Photo Diode Array 128 Element Photo Diode Array 256 Element Photo Diode Array 256 Element Photo Diode Array + Photomultiplier Tube (PMT) Photo Diode Array Photo Diode Array Photomultiplier tube (PMT) CCD Photomultiplier tube (PMT) Photomultiplier tube (PMT)
Exposure Time ms 10 - 6,000 3 - 6000 6 - 30,000 6 - 30,000 25 - 60,000 25 - 60,000 N/A 100 - 60,000 N/A N/A
Spectral Bandwidth nm 8 (std.) 5 (opt.) 8 (std.) / 5 (opt.) 8 (std.) / 5 (opt.) 8 (std.) / 5 (opt.) ³ 2.5 (aperture dependent) ³ 2.5 (aperture dependent) N/A N/A 1, 5, 10 (selectable) N/A
Spectral Accuracy nm ± 2 ± 1 ± 1 ± 1 ± 2 ± 4 N/A N/A ± 1 N/A
Wavelength Resolution nm < 3.5 <3.5 <2 <2 < 2 < 4 N/A N/A ± 1 N/A
Luminance Accuracy (2856K) % ± 2 ± 2 ± 2 ± 2 ± 2 ± 2 ± 2 ± 2 ± 2 ± 2
Luminance Range(Illuminant A) fl 1 - 5,000 0.2 - 30,000  0.01 - 2,500,000  0.001 - 5,000,000 0.001 - 500 0.0005 - 350 0.0001 - 1,000,000 0.5 - 420,000 0.0001 - 10,000 0.0001 to 10,000
cd/m2 3 - 15,000  0.7 - 103,000  0.12 - 8,566,000  0.003 - 17,130,000 0.003 - 1,700 0.0015 - 850 0.0003 - 3,000,000 (0.17- 1,400,000) 0.0003 - 30,000 0.0003 to 30,000
Digital Resolution   14 bit 16 bit 16 bit 16 bit 16 bit 16 bit 14 bit 14 bit 3 ½ digit 3 ½ digit
AutoSync Range  Hz 40- 250  20 - 400 20 - 400 20 - 400 N/A N/A N/A N/A N/A N/A
Measuring Aperture(s)   1°  or 0.5° (opt) 1° or 0.5° (opt) 1°, 0.5° 0.25° 0.125° automated 1°, 0.5°, 0.25°, 0.125° automated 2°, 1°, ½°, ¼°, 1/8°, 0.5°x1.5° 2°, 1°, ½°, ¼°, 1/8°, 0.5°x1.5° 2°, 1°, ½°, ¼°, 1/8°, 0.4°x40° N/A 2', 6', 20',1°, 3°
Viewing Field  
(with MS-55)

(with MS-55)

(with MS-55)

(with MS-55)
8.5°
(with MS-55)
8.5°
(with MS-55)
8.5°
(with MS-55)
13.7° 1.9°, 5.9°, 11° with OL-7
Minimum Measuring Area inch 0.02 with MS-2.5X Lens 0.01 with MS-5X Lens 0.001 with MS-5X Lens & 0.125° aperture 0.001 with MS-5X Lens & 0.125° aperture 0.001 with MS-5X Lens and 1/8° Aper. 0.001 with MS-5X Lens and 1/8° Aper. 0.001 with MS-5X Lens and 1/8° Aper. 0.0048 with MS-50 lens 0.004 with MS-10X Lens and 2' aper. 0.011 with MS-10X lens Minimum Measuring
mm 0.51 0.289 0.036 0.036 0.02 0.02 0.02 120 10 0.28
Min. working distance with standard lens inch 14 14 14 14 1.75 1.75 1.75 4.84 7 0.6
mm 356 356 356 356 44 44 44 12.3 178 15.24
Battery   Rechargeable Nicad. Rechargeable Li-Ion Rechargeable Li-Ion Rechargeable Li-Ion Battery Pack (Optional) Battery Pack (Optional) Battery Pack (Optional) N/A N/A N/A
Interfaces   RS-232, IEEE-488 USB, RS-232 (opt.), Bluetooth (opt.) USB, RS-232 (opt.), Bluetooth (opt.) USB, RS-232 (opt.), Bluetooth (opt.), Analog Output (opt.) RS-232, IEEE-488, Parallel RS-232, IEEE-488, Parallel RS-232, IEEE-488 RS-232 Analog, BCD Analog, BCD
Data Storage   Ram Card SD Card SD Card SD Card On Board Floppy Disk On Board Floppy Disk Ram Card PC PC N/A
Mode of operation   Stand alone or PC Stand alone or PC Stand alone or PC Stand alone or PC Stand alone or PC Stand alone or PC Stand alone or PC PC PC Stand Alone
System Software   SpectraWin™ (opt.) SpectraWin™ (opt.) SpectraWin™ (opt.) SpectraWin™ (opt.) SpectraWin™ (opt.) SpectraWin™ (opt.) N/A PanelWin or VideoWin MOD 10 N/A
Size (approx.) inch 12" x 7" x 3" 14" x 7.94" x 3.21" 14" x 7.94" x 3.21" 14" x 7.94" x 3.21" 15" x 6.10" x 7.76" 15" x 6.10" x 7.76" 15" x 6.10" x 7.77" 7.81" x 4.13" x 6.32" 19.5" x 8.5" x 9" 12.5" x 5.75" x 6.25"
mm 305 x 178 x 76 355.60 x 201.68 x 81.53 355.60 x 201.68 x 81.53 355.60 x 201.68 x 81.53 381x 155 x 197 381x 155 x 197 381x 155 x 197 198.4 x 105 x 160.5 459 x 216 x 229 317.5 x 146 x 159
Weight (approx.) lb 4.75 3.75 3.75 4.5 12.5 12.6 9.4 12.6 26 8.5
kg 2.15 1.7 1.7 2.04 5.7 5.7 4.3 5.7 11.8 3.6
Measuring Capabilities   Spectral Radiance, Luminance, Spectral Irradiance, Illuminance, Spectral Radiant Flux, Radiant Intensity, CCT, L*a*b*, L*u*v*, RGB . 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 . 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 (On/Off). Spectral Radiance, Luminance, Spectral Irradiance, Illuminance, Spectral Radiant Flux, Radiant Intensity, CCT Spectral Radiance, Luminance, Spectral Irradiance, Illuminance, Spectral Radiant Flux, Radiant Intensity, CCT 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 Spectral Radiance, Luminance, Spectral Irradiance, Illuminance, Spectral Radiant Flux, Radiant Intensity, CCT, L*a*b*, L*u*v*. Luminance, NVIS Radiance, Illuminance, irradiance, CIE chromaticity
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