dumb question

StreetShark · Nov 3, 2007

Ok well I have a old canon flash from my FT-b and I just put it on my xt and it worked (minus exposer settings). will this harm my camera in any way or can I use it on my xt without a problem?

jedithebomber · Nov 4, 2007

There are no dumb questions but those gone unasked...

Anyway, I have read somewhere that there can be issues with voltage from an older flash damaging a DSLR sometimes. I am not sure about your particular combination and I did not come up with anything on a quick google search. Maby if you could post the specific model of flash you are using?

Garbz · Nov 4, 2007

Do you have a multimetre? Measure the voltage from the centre pin to the little contacts in the side of the hotshoe while the flash is on. If it's more than 6.3V use caution. If it's more than 24V stay away.

StreetShark · Nov 4, 2007

ok my dads an electrition so ill just get him to check that out.

Big Mike · Nov 5, 2007

HERE is a list of old flash units and their 'reported' voltages.

Keep in mind that this list was made with an older film camera in mind...so when they say if it's safe or not, they are basing that on about 9 volts. Your XT may well have a higher tolerance for flash trigger voltage. My Canon 20D, for example is rated at 250 volts.