Summary: Benn using the the MZ440AF-PT SunPak strobe for about 3 years on a Pentax K20D. The strobe will also work on the Pentax K10D as well. Good all around strobe for close in work out to about 15 feet or so. I use it with the defuser and that cuts the light somewhat but gives a bit more natural look -- also really cuts down on the flash "hot spot" because the light is scattered.
Summary: Mark had it right when he said "If you're looking for a completely automatic TTL flash with no options for any manual flash work, then this is a well-priced unit that supports bounce and swivel. If you're looking for control or customization, forget it." However, I did not experience the same compatibility issues with my Nikon N60 that he did with his Pentax. It works like a champ.
Pros: PRICE, Guide number (40 @50mm), 90 degrees tilt, 270 degree swivel, manual zoom capability, 20mm coverage with panel
Summary: I got this flash because my current Pentax flash (the AF200T) does not have a bounce head, and I wanted to try out bounce and use some of the nifty Lumiquest gadgets (like the Mini-Softbox and the Pocket Bouncer). If you're looking for a completely automatic TTL flash with no options for any manual flash work, then this is a well-priced unit that supports bounce and swivel. If you're looking for control or customization, forget it.
Pros: Bounce/swivel head, AF assist, powerful, TTL support, neat accessories (WA diffuser and angle bouncer)
Cons: poor instruction manual (one sheet of paper), simplistic controls, Pentax version does not fully support all exposure modes
Summary: I tried the Canon 380ex before purchasing the Sunpak flash. I needed a little extra power, and I was looking to save a few dollars(like to save up for the 540). The other advantage of the Sunpak is the ability to swivel. What do you lose? E- TTL(max sync of 1/125), and a powerzoom head. Build quality is fair, and mine has seen some abuse. You can't go wrong for the price.
Pros: Powerful, Swivel/ Tilt, Price
Cons: (Manual Zoom), (no E- TTL), Manual controls, no display