The WhiBal WB7-RC G7 White Balance Reference Gray Card (7.5 x 10") is extremely accurate, convenient gray card that can be used in any shooting situation. It can also be used to set neutral White and Black reference areas for setting dynamic range in digital capture using the Black and White Eyedroppers available within Lightroom and other RAW conversion software, Photoshop and most other editing software.
By photographing a gray card reference for each lighting situation, you'll be able to achieve a proper white balance for all of your pictures. The gray card reference picture can be used with software to balance the color casts that various lighting conditions produce with all digital cameras.
Very compact and clips to camera strap. perfect to get white balance every time. Just place it on the ground and shoot a picture of it. Waterproof, virtually indestructible.
Handy to have, easy to carry around.
No support from WhiBal. White balance setting is hit and miss. May be the G6 is the one to get until there is instruction on how to use the G7.
Indispensable if using the HiTech ProStop filter for long exposures. It makes eliminating color cast as easy as one click. Works so well I should probably use it under other conditions, too.
Helps may my pics look great every time.