Quote Originally Posted by Photo Engineer View Post
If the layers are not perfectly balanced, then the image can shift color, have color crossover and often will give very poor results.
PE, I am using Provia 400X for 4 years now. I have shot hundred of rolls of it, dozens pushed. How much have you used?

There is no color shift and color crossover pushed at 800 and 1600.
Grain is almost the same at 800 compared to 400. You need a 12x loupe to see the very small differences.
At 1600 grain is coarser, but still very fine.

@athiril: Provia 400X has much better sharpness and higher resolution than Portra 400, at normal speed and pushed.
The difference is big, 20 - 30% depending on the used speed.
And Portra 400 is even worse in this respect compared to Pro 400H.
I've done direct comparisons.