Anyone tried these things?

Used them extensively with my DV500U, which was a bit on the cool side. These cards work as advertised... well made... nice case... varying degrees of 'push' on different graded cards. If the effect is what you want/need, go for em...

Thanks Robert. I'll give them a go. I shot an interview a while back and the lady turned out blue. fortunately FCP 3 way colour wheels did the trick perfectly, but it woud be good to have a set handy to experiment with.

I carry them in my bag and use them all the time. As stated earlier, the varying degrees are great too. I also find that the white card on the back side is useful as well. The only way thing I can think of for improving them would be to ad a focus chart on the white card side. I also find that the pocket sized cards are extremely handy.

i looovvvveee mine.... so much so that im thinking of marrying them.

NM, i just realized ow stupidly disturbed that sunded.

Rarely end up using warm card white balances. I own Canon cameras, which are natively on the warm side to start. Still, I never go anywhere without warm cards, and always use them for testing. There is always the shooting situation where they are worth their weight in gold.