I currently have a EM-5 (original model) with a 12-50mm and Panasonic 20mm. Neither are great indoor lenses (the 12-50mm is slow aperture-wise so it won't work well indoors and the 20mm is slow to autofocus). Since I'm expecting a baby, I want to make sure that I have a good lens that can quickly capture special moments (e.g., a smile or expression). Obviously the baby won't hold his expression for a second or two while the Panasonic is hunting for a focus lock. I've narrowed down the choices to: 1) Olympus 17mm and/or Olympus 25mm (probably would only get one at first) 2) Olympus 12-40mm If the Olympus 12-40mm would work well indoors, then that's the lens I would prefer. This is primarily because the 12-40mm would also be a nice upgrade for my 12-50mm and would serve well on my hiking excursions as well (I generally prefer not to change lenses while hiking so I avoid primes, and this will be even more true when carrying a baby as well). However, I'm worried about the autofocus speed and the fact that I give up 1.33 stops of light (1.8 for the primes vs 2.8 for the zooms). Thoughts? For those of you who are parents, would you be happy with the 12-40mm for taking pictures of your baby? I apologize if this has been posted before, but searching for "baby" on this forum tends to bring up a lot of false hits (e.g., "this lens is my baby").