Hi Arvid, In that case, 1/1000s with f/2.8 is the light equivalent of 1/125s with f/8.
I suggest you set the maximum sync speed (1/125) in TV, then set the flash for 1 or 2 points underexposure in TTL. The 550 EX is a very powerful unit and even at f/8 can reach about 7 meters with ASA 100; with 2 points underexposure (TTL), it can go about 14 meters... On the other hand, if you really want f/2.8, you can try using the special EX mode of the 550; I think the couple eos30 / 550EX can sync up to 1/8000. I have no experience with that, though - I use an eos 5 with the 540EZ. Hope that helps. Eugenio. > ---------- Mensagem original ----------- > I tried to use my flash today as fill in. Setup is eos30/70- 200 f2.8 en 550 > EX. > I wanted to use av at 2.8 and set the flash at - 2 for fill in. It was sunny > but the shutter speed was 1/125 (the sync speed of the camera). With out the > flash the shutter speed was in the range of 1/1000. So the pictures I took > will all be overexposed. * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
