Lens flare are unwanted artifacts caused by internal reflection and scattering of sun rays inside the lens. It appears when the sun is near or within the shot angle.
That’s it, have you been wandering in wheat fields during harvest? Or was it hiking on windy cliffs? Or you just use your gear a lot, and it gets inevitably dirty? Anyway you got visible specs of dust on your photos, and here are a few steps to get rid of it.
An empty or dull sky, whether white or blue, in a large part of an image is a vaste of space in a composition. You can’t necessarily wait on site for clouds to come or go, though ! One of our modern-days solution is to artificially replace parts of the sky.