bkyser wrote:
OK, progressives. That's what mine are. Around here, we call either lined, or no-lines, just bifocals.
Not sure of your camera, but a way around the back button focus smearing the lens, is to (depending on the camera) maybe assign a different button to the task, then get used to that button instead of the back button??? Haven't tried it, but now, I'm thinking I can save a lot of glasses cleaning time.
Canon T3i. I'm thinking that was the only back button available, but will double-check. Might go back to "regular" focus/snap button anyway - assuming I ever pick up the SLR again (purchased SX50 in early May!).