Elmarit-M 21mm/f2.8 (3rd Version) :

Atlas 2 (left), click to enlarge St. Patrick's Cathedral, (right) click to enlarge Elmarit-M 21mm/f2.8 (3rd Version) (T400CN)

On a Clear Day Elmarit-M 21mm/f2.8 (3rd Version) (RMS)