In SLR photography, how to make the sky (clear) very blue and white clouds very bright?

I want to take a blue one. 1, use a blue gradient mirror, forget the expensive one, a dozen pieces are cheap, and they are square.

2, CPL polarizer, very expensive. The cheapest one is also 100, it seems.

3. White balance. Adjust the color temperature, there are colors in the manual white balance, find the menu, free of charge. But it affects the overall tone. If not, try setting it as an incandescent lamp.

Think about those clouds. The main reason is that the exposure of the cloud is suitable, and other places are overexposed. Use a medium gray gradient mirror. It's cheaper than ten yuan.

Want to be colorful. 1, change the lens. This is absolute.

2. Pay attention to the light. Natural light can best show its true colors, and the side light has a strong three-dimensional effect.

3. Late PS. You know, there is no color that can't be adjusted.