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ExpoDisc Digital White Balance Filter, 77mm | 
 enlarge | Brand: Expoimaging
Category: Photography
Buy New: $94.99
New (8) Used (1) from $80.00
Rating:  17 reviews
Media: Electronics
Shipping Weight (lbs): 0.3
MPN: EXPOD77
Model: EXPOD77
UPC: 751751000770
EAN: 0751751000770
ASIN: B0002GFOSU
Availability: Usually ships in 1-2 business days
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| Features:
| • | Fine tune your color at point of capture | | • | Works in mixed, or difficult lighting | | • | Replaces your gray cards and white cards | | • | Spend more time shooting and less on workflow | | • | It's convenient, fast and easy-to-use |
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| Editorial Reviews:
Product Description
- Capture Accurate Color
- Convenient, fast and easy-to-use
- Works in Mixed and Difficult Lighting
- Reclaim Time Spent Correcting Color
- Replace Your Gray Cards and White Cards
Even the best digital cameras are incapable of consistently delivering accurate color without the user performing a custom white balance. Auto (AWB) and preset white balance functions often produce maddeningly inconsistent results. Images shot without a correct white balance may have unnatural looking red, yellow or blue tints that are time consuming and difficult, if not impossible to correct. Recognizing the importance of custom white balance to good color, digital camera manufacturers have designed their cameras to take advantage of a custom white balance. A custom white balance calibrates the camera to the exact color temperature of light illuminating the subject. The ExpoDisc is a custom white balance filter that allows digital photographers to quickly and easily set an accurate custom white balance. Consistently producing excellent results in natural, artificial, and studio lighting, the versatile ExpoDisc even excels in difficult mixed lighting environments. The ExpoDisc is far easier to use than any gray card, white card or calibration target. Simply place the ExpoDisc in front of your lens and capture the incident light while setting your camera's custom white balance. Using an ExpoDisc custom white balance will virtually eliminate the need for RAW or JPEG post-capture color adjustments. ExpoDisc technology takes a unique approach to setting a custom white balance and producing accurate color. The ExpoDisc essentially uses your camera's built-in custom white balance capability to turn the camera into an incident color-metering tool. This approach avoids the common problems and inconveniences associated with using gray cards, white cards and calibration targets: unwieldy size, unwanted reflectivity, improper angling and difficulty of filling the fr
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| Customer Reviews: Read 12 more reviews...
 Wound up not being very useful January 2, 2009
I bought this as I often take photos at night under sodium vapor lights and I was hoping that this filter would help me get the right balance. Problem is that nothing can make sodium vapor lights look right! At least not the low pressure ones. Even the high pressure lights are difficult to get the WB close. This device was not very useful to me and I wish I had spent the money on something else.
 It works but it is a pain to use December 8, 2008
1 out of 1 found this review helpful
Well the product does work as advertised. It gives you very accurate custom white balance readings. The problem is that you have to shoot the sample image back into the light source, which is not always possible to do unless you are in a studio or controlled location shoot. For scenics it is not very practical. I used it a few times but it mostly sits in my bag now. It's too much money for something that you don't use because it is a hassle. I am open to suggestions from other users if I am making it unecessarily complex or am misunderstanding how it is supposed to be used.
 Expodisc works great October 8, 2008
Expodisc is a must for every photographer caring about WB. I've even seen slightly better accuracy than gray cards in some cases.
ExpoDisc Custom White Balancing September 30, 2008
This product is phenomenal. Taking sport pictures from sunlight to stadium lights can be a challenge - but this makes it so easy to get the perfect white balance.
Invaluable tool used in the field. June 2, 2008
3 out of 3 found this review helpful
The first thing I did when I bought the Expodisc was shoot a yellow wall with incandescent lighting. This is the most dramatic example of how the Expodisc makes you realize your camera's auto WB is worthless. Your camera sees a yellow wall with yellow lighting and overcompensates by making everything bluer than it should be. Expodisc only cares about the color of the light source, so it only removes the yellow cast of the incandescent light.
In the example above, a grey card may have been SLIGHTLY more accurate due to the yellow walls surrounding the light source and therefore some ambient color cast infiltrating the disc's view. But in 95% of normal scenarios, this little tool will be just as accurate and far more convenient.
Another note: if you are new to color calibration, be sure to thoroughly read the instructions for the Expodisc. Because used improperly, this tool could produce horribly inaccurate results. Used properly, however, you'll find that it's as useful as a grey card without the hassles of a grey card. Just pop it on your lens, aim toward the light source, and you've got yourself accurate color balance!
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