But the Skylight filter has no defined depth of 'pinkness' like anything from the Wratten series. Nikon's 1a filter is not the same as Canon's nor as Hoya's for example. You've only got to put two different makes of Skylight filter side by side on a white surface to see that. And pink isn't the complement of blue, nor is it a CT shift filter colour, that's amber. Using a faintly pink filter on colour negative film? Really? When a twitch of the Y and M printing filters would do the same thing. Totally pointless IME. It's not as if batch-to-batch variations of film or colour paper are within the +/- 0.1R difference that a Skylight filter would make.