Functionality OK OK performance, unfortunately, after the first use in Fotorgrafiren in a church after about 50 pictures a huge bang and broken - no longer triggered thereafter, probably overheating of capacitors, why a "German" Qalitätsprodukt after 50 images the mind gives up here is a mystery to me - admittedly I photographed in burst mode - but he Solte only trigger when the temerature or state suits - good product unfortunately only minimally resolved