Polarizing filter. This can be a significant just one, specifically for landscape photographers. Don’t get an inexpensive polarizer or it's going to hurt your graphic top quality. We propose the B+W Kaesemann filter (of the identical thread dimension as your lens). See our polarizing filter short article also. Modified digital https://www.youtube.com/channel/UCOhvCyjfJHUz5Re6214GX0g