Hi all, I saw it somewhere that people say max x-sync speed at 1/250 is not enough for studio shutting, but what exactly is x-sync? I guess it's to make the shutter and flash both fire at 1/250 speed? if so, I guess it's enough for studio use. hassy H1 has it up to 1/800 i believe and is it really all that useful? Sorry i am still new to studio kinda thing. thanks.