As well as I have been looking for a good gray card some other buyers and am initially encountered by chance on the SpyderCube. Further research then let me come to the decision to derogate from the gray card and buy the little "Rubik's Cube". But Klein is also the key word of the only drawbacks. If the dice still represents a truly meaningful help smaller, to be photographed objects, so it is in the outdoor area but "slightly" undersized. Of course you can "zoom back properly" in the subsequent data optimization to make a tonal and color correction using the land, but in reality shows but then also how different turn out the results when only a few pixels to the right, left, clicking on the top or bottom. But then, if necessary, is no longer sufficient, the resolution, since the measuring field is no longer homogeneous enough. But you would not know even before you buy if you have carefully studied the product description and then provides that the SpydeCube only has a size of 4 cm - and which are smaller than you think ;-)) Strictly speaking, the cube only 3.7 cm square and in the article description next above number of 7 cm is misleading and simply wrong !!! Should there someday be a "big brother", I will also appoint him - precisely for the above-described shooting "on location". A size of about 12 15 cm - would be here in my opinion, ideal ... Then one is really prepared for all photographic situations, since the functions of light and shadow measurement provides no gray card in the world! Five star so there's only one reason not because of the dice by its small size (only 3.7 cm!) Is only limited practical. But otherwise highly recommended!
