Jack, in my experience, TTL metering is not very accurate at ISO 800. Stick to ISO 200-400. (Who needs a flash at ISO 800??) Exposure should be OK at ISO 200. Did you have a too lagrge distance to get enough light at ISO 200, do you think? Did you use the correct FOV for the flash? I have also noticed that TTL flashes don't work very well with the *ist D if I use the red-light spot for AF. Don't ask me why. Flashes that don't have this feature work better in TTL mode.
I wouldn't use Green Mode - at all. Green mode is for Point and Shooters and doesn't really belong on a DSLR IMO. I use manual mode to ensure that I am in control of speed and aperture. The TTL (or the flash sensor) will take care of the exposure. I am in charge of DOF and motion-unsharpness (provided the room is not completely dark). Annother thing. I hardly ever use a flash directly. Light is supposed to come from above. Not horzintally. Horizontal shadows are ugly IMO. I bounce off the cieling or at lest off a 45 degree screen on top of the flash, or a small soft box - or whatever. Anything but a direct flash. Your shots will look as if they were made with a Point & Shoot. Anyone can do this with a Canon IXUS or whatever - so why bother carying a heavy DSLR with a big flash on top? But you are right TTL flash sucks on *ist D. It's not accurate. Find you own mode. And know how much exposure compensatiob is needed for ISO 200, 400 and 800 for a particualr flash. Then simply stick to these settings. Photographers hav always done this. Good or bad pictures, that's your choise. Afterall - a camera is just tool - like a hammer or a bicylce. You're the craftsman. Regards Jens Bladt http://www.jensbladt.dk -----Oprindelig meddelelse----- Fra: Jack Isidore [mailto:[EMAIL PROTECTED] Sendt: 7. november 2005 18:50 Til: [email protected] Emne: flash issues with IstD and 500FTZ I have an istD with 330FTZ, 400FTZ and 500FTZ flashes. The camera is in green mode and I take flash shots at ISO 200, 400 and 800 ASA all from a tripod, the same subject and the flashes in auto-TTL mode. The 200 ISO shots are all underexposed, 400 ISO is more or less correctly exposed and 800 ISO are all overexposed. The IstD manual recommends 200-800 ASA for these flashes. The solution would be to allways use ISO 400 for flash which would be very strange. Jack
