Some of you might already know this but I haven’t seen it mentioned on this site yet. If you have the 50 DR, you can focus closer than 1m, simply by pulling out and moving the focus ring as if you had the close-up goggles on. The focus ring won;lt move, but if you depress the ball bearing on the flat area the goggles normally fit onto, the catch stooping the focus ring moving is released you can now focus as close as 19”.