Is there any benefit in this process?

[Robbo]

Right back to my white balance questions lol

Is there any benefit to using the black, white and grey card all in one things in the picture. Then using levels for e.g. and sample each colour with the droppers. Will that produce as accurate as it can, or would it not make much difference as opposed to just using the grey card?

Thanks

 

[swanseamale47]

It should help set the white and black points.

 

[Robbo]

I ask as I have a white/grey card from amazon unopened and I am tempted to get a refund/for a different product.

It came about as I was processing a picture today and it was a bit off, tried to set the black point and there wasnt really anything I could set it to. So I thought I might be best off getting the trio set just in case.