I was very satisfied with my previous Sony HVL-F58AM Flash (200 photos without heating) this Sony HVLF60M do not .The shoe is placed in an unstable position on my Alpha 850 and the slightest nudge will be fatal to him (if movement in the crowd) .It heated to the 36 th photo and many minutes it takes to use again (at a wedding that's great, "expect Mr Mayor, my flash cooled .....! ") I regret this purchase.