>>4292934Not OP commenter, I have a Zebra Tessar but like many DDR lenses the aperture seized due to old grease so I need to open it up from behind and clean it. If the aperture on the LZ is worse than that it must really suck. Do you mean that it's less reliable or that it just has a funky shape?
Also the Zeiss Jena lenses seem to have more vibrant colors, not sure if that's a coating meant more for black and white contrast or a warm tint but is the 61LZ lens similar or more neutral than that?