My camera will allow me to preview everything in black and white. I shoot RAW, meaning the color information is kept even in these black and white modes. It’s the best of both worlds. I can shoot as though I’m shooting black and white (allowing me to focus more on light/shadows) without having to commit to the photo actually being black and white. This allows me to focus on composition etc at the moment and think about color in post.
Taken with a6000. July 16, 2017.