2. Camera scanning (negatives), spectral lighting testing, Dynamic range tests
  3. Spectral analysis of different light sources

Spectrum 6

Comparison of spectrum measurements I did with a home made spectroscope processed by ImageJ (as was explained to me on http://www.dpreview.com/forums/post/53041627) with ArgyllPro ColorMeter using an XRite ColorMunki spectrometer. Tungsten and the LED didn't fare too well, but the ImageJ plots of the CFLs weren't too bad.
Note the final image of ColorMeter in Photo meter mode.
http://www.argyllcms.com/pro/index.html
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ColorMeter Photography mode. Incident light (Ambient mode). The middle "Y" number (474.27) is in Lux. You can slide each of the Exposure (Shutter, Aperture, ISO) around to determine manual camera settings. For this amount of light.
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ColorMeter Photography mode. Incident light (Ambient mode). The middle "Y" number (474.27) is in Lux. You can slide each of the Exposure (Shutter, Aperture, ISO) around to determine manual camera settings. For this amount of light.

  • Tungsten measured with home made spectroscope + ImageJ processing.
  • Regular 100 watt tungsten bulb
  • Regular 100 watt tungsten bulb
  • Regular 100 watt tungsten bulb
  • Cree soft white 80 CRI LED measured with home made spectroscope + ImageJ processing.
  • Cree daylight (rated 5000 K, CRI 80) LED
  • Cree daylight (rated 5000 K, CRI 80) LED
  • Cree daylight (rated 5000 K, CRI 80) LED
  • Philips soft white CFL measured with home made spectroscope + ImageJ processing.
  • Philips Soft White 100 watt (equiv. 23 watts real). No K listing on the package.
  • Philips Soft White 100 watt (equiv. 23 watts real). No K listing on the package.
  • Indoor Sunshine daylight CRI 93 CFL measured with home made spectroscope + ImageJ processing.
  • Indoor Sunshine "full spectrum" 93 CRI CFL.
  • Indoor Sunshine "full spectrum" 93 CRI CFL.
  • Cree warm white 60 watt (equiv., 9.5 watts real) CRI 80
  • Cree warm white 60 watt (equiv., 9.5 watts real) CRI 80
  • ColorMeter Photography mode. Incident light (Ambient mode). The middle "Y" number (474.27) is in Lux. You can slide each of the Exposure (Shutter, Aperture, ISO) around to determine manual camera settings. For this amount of light.
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