I don't think Sage is the one who has the problem of holding still for pictures. Although, Chandler has taken it upon himself to help her out for a quick snap shot.
He basically ignored her for the first three months of her life. He occasionally kissed her on the top of her head and would say, "hello Sagey!" (He only calls her Sagey, I don't think he knows otherwise).
These past few weeks he can't get enough of her. Always talking to her, kissing on her, wanting to hold her, feed her a bottle, peeks in on her while she is sleeping and even soaps her up in the tub. Oh, the brotherly love. I hope it lasts for a long time.