Originally posted by stevebrot SNIP I have a Sigma EF-610 DG Super, but have found that I get comparable results from a Pentax AF-280T using the flash's on-board sensor.* If I were going the strobist route, I would forego buying dedicated flash entirely. * Yes, I regret spending the $225 USD for the Sigma
The I do not regret my 610 Super. It's a great value compared to similar flashes from Pentax and Metz.
The 610 is very bright allowing use of high speed sync fill flash from a distance on sunny days, useful during parades and other events. P-TTL mode, despite its limitations, is a good way to manage constantly changing ambient light conditions. The 610 also has stroboscopic mode special effects, not an essential feature but it does open up some artistic effects that can't be done with many other flashes.
(For portrait and still life photography, yes, the 610 Super and similar P-TTL flash has unneeded features and costs.)