43 mm mentioned not just a net friend online is not much Pentax F1.9 LTM photos...Just about the author as early as 10 years ago, have been of up to 5-6 times for a long time, every time also want to stay for a while, but in the end is also sell it, the last time, want to start again experience, out to after the discovery of mirror have mildew, and ultimately the fate not to...The author also hope can start with a try again, but on M10D, interest is not big, really like to use on the M11 or A7R5 should be better...FA43/1.9 is the first a Limited lens Pentax, called a Limited edition of set limit to produces per month, is one of the most long-lived Pentax lens...From 1997 to start producing, there are points late early lens glass leaded version, version of the skull, medium-term Vietnam production, in recent years to join the HD version Coating...There are a lot of friend will be called: Japan's big princess, princess, Vietnam, etc...For most of the Pentax enthusiasts, or they'll be more love the earliest Japanese system including the version...