3 of 5 people found the following review helpful
White Balance card,
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This review is from: Digital Grey Kard DGK-1 White Balance Card / Gray Card for Digital Photography (Camera)
Great product - makes setting proper white balance very easy with my Pentax k10d. Always used Auto White balanc in the past but it it surpring how better the results are settin WB manually. If this card was bigger would have been great for an approximate 18% grey card for exposure. It will work for this but if it had been larger it would be ideal. (They do make a larger card - check the website).