> > This has probably been discussed ad infinitum on this list, but I've > recently rejoined after several years absence. Can someone > encapsulate the major advantages of the 580 over the 550
I have both, so here are some 580 advantages off the top of my head: - slightly more power - slightly slimmer size (same height and thickness, but 10% slimmer in width) - easier user interface with dial controls rather than +/- pushbuttons - 1/3 f-stop increment control possible - single button to allow both tilt and swivel (550 has separate buttons for tilt and swivel) - 180 swivel both directions (550 only allows 90 degree to the right) About the only marginal advantage the 550 "might" have is when I used the 550 and 580 with an ST-E2 IR controller, it seems the 580 was just a hint less sensitive to the control signals beamed out from the ST-E2, but this could easily be how the signal is bounced around in this fairly large set, the flashes were placed a bit behind my and each flash was good 10 feet either side of me, I eventually solved the problem by rotating the sensor head of the flash to the ST-E2 but swivel the head towards the reflector umbrella. Ken * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
