Datacolor SpyderCube

Finally a tool that handles black point, white point, and midtones all at once without needing a separate gray card. The black trap and white cube surfaces make setting levels in post so much faster.

As soon as I got this cube I tossed my old gray card; having black, white, and gray faces all in one solid reference saves so much time in post, and the white balance is spot-on every time.

I've been using this tiny cube to set my custom white balance in post-processing, and the black body and mirror surfaces make it incredibly easy to nail exposure and color temperature every time. It saves me at least ten minutes per shoot when I used to fiddle with gray cards.