Summer is not my favorite time of year in my favorite National Park, but it's still a wonderful place to visit. Mostly I spent my time camping and enjoying the outdoors as opposed to being there for photographic purposes. My son and I particularly enjoy it there, and we especially like it at the higher elevations in summer months. I took a bunch of camera gear with me, primarily Canon FF and M43, but mostly shot with m43. I brought Canon FF for one main purpose -- astrophotography at Glacier Point. A few of the nights were moonless, and being at 7400 ft with clear skies is a great opportunity to see stars. Otherwise I was shooting with EPM2 or LX7. I highlight the Oly 17/1.8. Despite the "meh" reception it has received, I find it an essential lens for the format. It's a fast 35mm equivalent, and the snap manual focus is a superb feature, especially for long exposures for landscape photographers. It's not as sharp as say the PanaLeica 25mm, but it is still a really sharp lens with good performance across the frame. Images look great in print. 1. Pine Tree at Glacier Point (14/2.5) 2. Sierra high country (45/1.8 + linear polarizer) 3. Pine Drop (45/1.8) -- A small plant that has no green color, hence the pine drop gets its food via stealing it from fungi. 4. The Milky Way from my campsite (17/1.8, ISO 3200, 15 seconds) 5. I'll sneak in a non-SC image (Canon 5D3 + 35L). Stargazing at Glacier Point on a clear summer night is a sublime experience, and by itself (photography aside) is more than reason enough to visit YNP. The evening I was there, a thin crescent moon was setting in the west, which provided just enough light on Half Dome.