Ok, so I am loving night shots. I have been trailing a lot (car trails, star trails etc.) I always focus manually for these ocasions but the problem is that something (fore or after) is always out of focus. Even with apertures of 16+. I know there is an online calculator for hyperfocal but is there like a quick calculation? say, full frame body, 17mm lens f11 will be 2.5m or something like that.? Any help on this is highly appreciated.