Quote:

---

So the light received back off the subject is measured by the camera (only?) the flash gun does not measure returned light at all?

---

Quote:

---

I take it it does this regardless of where the flash head is pointed (bounce/direct)

---

Yes but...

Beware of the nature of the surfaces used to bounce the flash. Coloured surfaces can play hell with white balance, surface which are not flat or at awkward angles may generate hot spots or shadows in the subject area which may distort the meter reading and reflecting surfaces which are highly polished or very matte may return levels of light which are close to or outside the normal range of the metering system causing under or over exposure. Avoid very long bounce paths too as this can throw things off a bit. Modern TTL flash is remarkably adept but it's not perfect and can be tripped up. Of course with digital you have the advantage of being able to check instantly whether everything is fine or whether a bit of compensation is needed...

--------------------
Nigel

Completely BSRIPN

ElSid Gallery

A camera in the hand is better than one in the cupboard........

Post Extras