The "shhhlik" of a leaf shutter is a beautiful sound and music to my ears, particularly the Copal, as they have that extra "H" which the focal planes don't have. On the subject of the perfect shhlik or "shhhlik" sound of a leaf shutter. Do APUG members have a favourite, be it focal plane or leaf? For me it would probably be the sound of a Vitomatic IIb on 1/15 second. Preferably just after its been serviced and from the northern end of the vineyard.