There are small particles of dust inside each lens, that are inconceivable to scrub with out taking aside the lens – and so they haven’t any impression on a photo whatsoever. But flashes are helpful outdoor, too, even in the midst of the day. If you’ve ever heard of “fill flash,” this is why it’s so necessary. You can fill in ugly shadows in your subject just by using a mild flash – and most people wanting at the photo won’t even be able to tell. Don’t get me wrong – they’re great if you want some additional light. The…