Sigma Electronic Flash EF-500 DG ST for Pentax SLR Cameras
From SIGMA
Electronic Flash EF-500 DG ST can be used with Sigma's and other manufacturers' AF 35mm SLR cameras and Digital SLR cameras. It has a maximum guide number of 165 in feet or 50 in meter at 105mm focal length (ISO 100). Projection angle of the flashlight is set automatically to match the lens' focal length ranging from 28mm wide-angle to 105mm medium-telephoto. It incorporates a wide panel that expands the angle of illumination that of a 17mm focal length lens.It enables full automatic flash photography by TTL automatic flash exposure control. It now includes S-TTL flash photography for Sigma, 3-D multi-sensor balanced fill flash function and i-TTL flash photography for Nikon, E-TTL II flash photography for Canon, ADI flash photography and P-TTL flash photography for Minolta.For bounce flash it can be tilted 90? upwards and 7? downward for close-ups. Also, it can be swiveled 180? to the left and 90? to the right. In addition manual flash can be set to full and 1/16 output levels in 2 steps. Covering focal length of the flashlight can be seen on the LED panel and the flash ready signal can be seen in the viewfinder. EF-500 DG ST incorporates auto power off system.
Brand: Sigma Model: F15109 Released on: 2006-05-04 Dimensions: 4.00" h x 5.50" w x 3.00" l, .71 pounds
Very Good TTL auto Flash. I really like the TTL feature on this flash. The head pivots 360 degrees and is able to bounce off walls or a ceiling. Took some great shots of a newborn while the camera was pointed downward and the flash bounced off the ceiling. The manual modes don't have enough information to be effective. The auto mode works so well that I can see why they never figured you would use the manual modes. Has a built in diffuser that is a little fragile (be carful) but works well. The power zoom is supposed to save batteries as long as you don't zoom in and out a lot. If so then it back fires and actually uses more power. You can overcome this issue by using the diffuser which disables the power zoom head on the flash. This flash was about half the price of the camera brand name equivalent. This flash can't be fired wirelessly so I bought a cheep slave for my other flash, an old Vivitar 2800D. They work perfectly together. Could get another salve and use the on camera flash to fire both of them. Sigma EF-500 Bought the flash and have used it for school and church functions. Performance is wonderful, I am still learning about how it works- but expect to use it for years. Great tool for the price.
