Summary: I bought this flash as a cheap alternative to the Nikon dedicated flashes for my D70. It works well as a cheap dedicated flash for fill-in and bounce and is pretty powerful with a guide number of 50. Its simple and easy to use. With an omnibounce attached I've have found it has a tendency to overexpose unless flash compensation is used in camera, but on the whole I'm please with the results.
Pros: price, very easy to use, good wide angle capability, bounce capability
Cons: big and bulky, build quality not that great, noisy zoom motor on flash head, no advanced features
Summary: I have had this product for about a month and I think it is a Quality Flash for a low price.I have used the Sigma EF-500 flash for a wedding, and it lighted the alter part or the church very well. The output seems to be consistent, or at least very close. The rate of recycling couldn't keep up with 3 fps, but is still has a fast recycling rate. The flash is somewhat noisy, but not that Noisy. The flash comes with a stand and a small bag.
Summary: I didn't like its finish, no back LCD display. I believe you get more with the Speed Light.... BTW recovery time its very good. I bought few SIGMA stuff and their product are very good and well done....
Summary: Seems perform as expected. Very simple to use, which could mean restrictions for some body. Haven't missed anything yet. Connection to camera is plastic, wonder if it's going to brake since it still is quite heavy flash as they seem to be. Built in reflection card would be nice and option to disable AF assistance. Still good value for money.
Pros: Cheap, simple
Cons: As big as more complex and powerfull flashes, simple
Summary: I purchased this flash as an alternative to the NikonSpeedlight for a new D70-s camera. After comparing featureswith the Speedflash 600, I decided on this unit. I'm very pleased with the performance, recovery time, andi-TTL compatibility with the camera. I recently took over700 photos at a Drag Racing event and with the exception ofa very few night shots( In burst mode) some of the 5th or6th shots were a little dark, but No flash can recover thatquickly ( 3 fps burst).
Summary: för det priset så är det en toppen blixt! använder den till min KM D5D och den fungerar super. HSS fungerar jätte bra. lätt att förstå och ger bra exponeringar... det ända negativa jag har är att priset höjdes en vecka innan jag köpte den men den är lugnt värd de 1600 kr jag betalade för den. köpte även med en bouncer som är ganska lätt att sätta på och ger betydligt bättre ljus.