For the past decade, the renowned photographer Mark Seliger has set up a pop-up studio inside the annual Vanity Fair Oscar Party, where he’s produced iconic portraits of Hollywood actors in the immediate afterglow of their big wins. Those portraits are now presented in a new book, “Vanity Fair: Oscar Night Sessions.” Mark joins Tom to share how he captures the raw emotion of an artist at the peak of their success, plus some incredible behind-the-scenes stories from his shoots and his best advice for everyday smartphone photography.