will using 540 EZ flash with my eos 400d cause damage to the camera ?

AFLA · 16 Oct 2011 at 22:44

it seems to work fine if the flash is in manual mode,
but i just wanted to know if there could be any damage to the camera from using older spec electronics?

(not worried about lack of ettl etc, btw)

Raymond Lin · 16 Oct 2011 at 22:46

AFLA · 16 Oct 2011 at 22:58

Raymond Lin said:
no.

i didn't think so , i just had this nagging feeling i had read about this prob somewhere on the net.
thanks

asim18 · 17 Oct 2011 at 01:01

I've also heard that old flashes on new bodies can fry the electronics due to high voltage in the hot-shoe.

But I've been using a really old flash on my Nikon D40x for over a year and I've never had a problem.

AFLA · 17 Oct 2011 at 10:36

i just had this reply on another forum:
'It's safe to use...it triggers with 4v which is less than the current 580EXII's.'

if anyone can confirm this i would be grateful, will google in meantime.

Snapshot · 18 Oct 2011 at 06:49

It's just not an issue with any modern flash that has TTL control, even if the TTL doesn't work with your camera. As soon as there's any camera-to-flash communication it's limited to five volts. The problems are only with ancient manual or auto-only flashes. It's not something you need to waste time worrying about.

AFLA · 18 Oct 2011 at 18:44

thanks for all replies.
i've had this flash sitting in a draw for ages and feel a complete fool now for not using it sooner. just being able to bounce flash off a wall or ceiling is a massive improvement over the pop up flash.
PS i am using uniross 2100 mah hybrid batteries in the 540ez and they are working great. i once tested 2 of these in a compact and took over 300 pix with them. have taken at least 100 so far with the flash.