Okay, if you shoot JPEG

I tested the white balance filter on my Nikon D700 and thus largely able to achieve better results than with the auto white balance is not known at this particular camera in artificial light anyway. However, the white balance was still not 100% in order. I shoot in RAW and have (created with the white balance filter) even when the photos with custom white balance with a few clicks in Lightroom adjusts the white balance can be improved. A good, farbkalibrierter monitor this course mandatory.
I would highly recommend the filter to anyone who photographed only JPEG and is dissatisfied with the white balance his camera. Here is pretty sure to adjust with this filter to improve the photos and this at a not very large investment. If you are but anyway employs a RAW workflow of white balance, you can achieve in retrospect on the computer at least equal to exactly when is not suitable.
I have the filter therefore sent back.