ADDING DE TO SAND FILTER

Opteka Pocket-Sized Reference Color & White Balance Grey Card Set With Quick-Release Neck Strap for Digital Photography

The color values of Opteka Digital Grey Card set have been tested under varying light conditions and show a high degree of spectral neutrality. Using the industry-standard X-Rite spectrophotometer, LAB values of L* 63.8, a* -1.6, b* -0.4 are measured from the surface of the grey card under D50 standard illuminant. For optimum color correction, the black card achieves truly deep blacks (RGB 16,16,15). The grey card displays superior spectral neutrality with measured values of 162, 162, 160. The white card has a tested RGB value of (220, 224, 223). All three cards have excellent uniformity across a range of light sources.

Dinner at Kafe Warisan. We were seated outdoors, so almost all of the available illumination came from candles or tea lights in holders, making for some really tricky food photography.

Used the coffee filter method to set custom white balance against the candlelight. It's not perfect - colors tend to lean a bit too much to the blue side - but I think it's good enough, especially since I refused to shoot RAW this trip.

White balance experimentation: All shots taken from the same position, Aperture Priority, 2.8 FL and all using the same source of light.: A flourescent desk light
(From left to right)
First Shot: Taken using on camera white balance setting 'Flourescent'.
Second Shot: taken with on camera white balance setting 'Auto'.
Last shot: taken using manual preset white balance, set using a DIY white balance coffee filter.

With more than 40,000 customers, the Genuine WhiBal has become the standard in the industry for precision WB Reference "Gray Cards". Each and every card is measured with a precision spectrophotometer to assure you that *your* card meets our industry leading specification of +/-0.5 within the a* and b* channels. Do not be fooled by RGB measurements (they have no meaning in this context). Very simply, WhiBal combines all the best features of all available White Balance cards, and meets or exceeds their technical performance in a unique package that can be used conveniently in all your shooting situations. In addition, WhiBal provides convenient neutral White and Black reference areas for setting dynamic range in your digital capture using the Black and White Eyedroppers available in RAW conversion software, PhotoshopTM, and most other editing software. Check out the educational videos on-line. (Search for WhiBal). They tell the entire story. Feature Summary: ? It fits in your shirt pocket.(2.1x3.35 inches)...so you will actually use it rather than have it in your bag! ? It is basically indestructible, waterproof, etc ? All 4 reference "colors" are essentially equal to or better than all tested "reference cards" for neutrality and spectral flatness. ? All cards are designed for low reflectivity, except the BlackPoint sticker which intentionally is highly reflective so that maximum Blackpoint level may be achieved. ? Larger are smaller sizes are available. ? Can be used to set white balance reference, Black point and White point. ? Fits shirt pocket or can hang on studio hook or lanyard. ? WhiBal is a product of PictureFlow LLC, is patent-pending and proudly made in the USA.