I hike a lot in the evening, and I have found the Persimmon to be excellent in the woods and other low-light conditions. I noticed a good increase in contrast when walking on rocky terrain. The VR28's actually filter out a lot of light, and are perfect for sunny hiking/biking. I only use my black iridiums for driving or road cycling and other high-glare stuff. Lens changing is super easy. Much easier than the Smiths I had.