睇睇以下條鬼佬点樣比較呢兩支鏡.........Elmar 50 / 2.8 VS Summicron 50 / 2.0
https://www.rangefinderforum.com/forums/archive/index.php/t-78719.html
*That version of the Elmar is a classic wonderful Leica lens. Stop for stop it makes a very similar image to the DR and Rigid Summicrons made at the same time.