You could be right Hugh. I was just thinking that, as it's an electronically captured image, and not 'burned' onto a film emulsion, the same control might not be there. BTW, if you want an external flash, I've got a large 'hammer head' type Braun professional flash, that can be mounted on the camera base-plate, a tripod or hand held. The head swivells, has two different diffuser screens (head approx 5X3 inches) and it'll work on auto or selected manual settings. As it's fairly 'old news' by todays standard, the external, shoulder-slung re-chargeable battery pack is a bit large, and could possibly use a new battery, but it works very well indeed. (It should, it was top of the range of 'real' professional gear when new, and cost as much as the average SLR! )
Anyway, I never use it, and probably never will in future now, so, if you can make use of it, pay the postage and you can have it for free. (PS, I 'inherited' it when in the trade, so it didn't cost me a bean!)
E-mail me if interested.
Terry.