J F Clemens ( - ) is a painter. J F Clemens s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 77.14 USD for Menneskets alder fra 1 til 20 aar in 2014 to 626.75 USD for The most dreadful night in Copenhagen between in 2015 , based on the size and medium of the artwork.