The only way to create black by mixing colors is to combine the primary colors together. To do this with two colors, one may use one of three combinations, hues of yellow and purple, hues of orange and blue or hues of green and red.
A) True
Those notes are common in blues music especially during emotional pieces
1- use sharpest aperture
2- switch to single point focus
3- lower iso
4- use a good quality lense
5- remove lense filters
6- check sharpness on lcd screen
i can't help you if there is no picture.