Date: Sun, 06 Jan 2002 22:17:58 +0200 From: "Vesa Perala" <[EMAIL PROTECTED]> Subject: EOS Re: flash meters with ETTL
Good trick but unfortunately doesn't (always) work if you have more than one (E-TTL) flash. I have made some tests with flash in M-mode and master switch at 'master' and 'off'. It seems that to trigger the slave flash(es) a preflash of about 1/64 power is used (because when I used a single flash at 1/64 power and master switch at 'master' the flash meter showed 1 stop more light than with master switch at 'off'). Right? At manual output powers of 1/8 or higher the effect of the preflash was not significant (maybe 1/3 stop at 1/8 power). On the other hand, why would you use E-TTL and flash meter at the same time? If you need speed and flexibility (e.g. moving object) then forget the flash meter and use (E-)TTL. If you use flash meter then your flash can be in manual mode and you are in full control. My opinion is that flash meter and Canon wireless flash system with more than one flash are useless together (especially at low output power levels). Vesa Hi - I was talking about flash meters (currently in the market for one) to a local salesman, and was told that there is not a flash meter made that will reliably meter flash from a speedlite, because speedlites control the amount of light by duration of flash as opposed to intensity (like studio heads). I asked, well what about when the speedlite is in manual mode, surely we must get accurate readings then? And the salesman replied that sometimes accurate readings might come about this way, but it is still unreliable. As a newbie to the flash meter I ask, is this true or is this salesman off base? Will a flash meter help me get a better handle on my flash set up of 550 EX in slave manual mode and optical slave triggered sunpacks? (fired with the st-e2) Thank you and best, James * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
