Sunpak 266D TTL Flash Dedicated to Pentax and Olympus Cameras

For the price, it works well in manual and automatic modes (on my C8080 I had to use either one of the manual modes, or one of MyModes). However, this flash was made before the era of digital SLR cameras. The TTL is really not compatible with any of the new SLR's from Olympus (the digital models are not even listed).
Also, it does not have a manual way of controlling flash output, and the flash does not rotate off of its base for lateral bounces (the flash head tilts fine).
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Lumiquest Soft Screen, a Diffusion Sheet for On-Camera Pop-up Flashes.

1) The tab is too big to get in my camera's hot shoe without folding and stuffing it in, or cutting it.
2) Apparently my camera (Cannon powershot pro) disables the built-in flash when something's in the hot shoe - using a pressure switch, so inserting this all the way disables my camera's flash
3) Results are mixed. I didn't get underexposures, but some times didn't seem like it did much diffusing.

Your mileage may vary, but for $10 it might be worth a try.
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Digital Concepts Powerzoom 952AF/CAN Flash for Canon Cameras

I have the Canon Rebel XT, XTi, and XSi and have used this flash on all of them. It is very easy use...especially compared to the Speedlite 430 EX that I use on my XSi. I am a semi-professional photographer and an Art professor. I use this for my XT, when I'm at work, both on and off camera. It has a slave flash setting that works well, but I mostly use a wireless transmitter when it is off camera (on a stand with a reflective umbrella). It gives off great, consistent light. The ETTL function is wonderful, but mostly use the manual setting since I use it off the camera. You can change ISO, speed, and zoom very quickly in manual mode. It also regenerates quickly for the next shot. People that give this flash a negative review need to remember 2 things: 1. if you are shooting the flash strait at an object or person, you really need a diffuser besides the built-in one that comes with the flash. I like the inflatable diffuser that acts like a mini soft box. 2. If you are trying to lighten up objects BUT reduce their shadow, you need to bounce the light off of the wall or ceiling. If you are in a room with high ceilings (church, gym, auditorium, etc.), then you will either have to bounce it off a wall OR get your diffuser out and shoot directly at your objects. So in short, the built-in diffuser is junk (just like the one in the Canon 430 EX) so get a soft box diffuser for it and it will be just fine. Remember, practice makes perfect...so get some NiMH AA batteries and start practicing angles, zoom, and speed. Once you know how this flash works and its capabilities, you will be very happy that you purchased this flash.
Buy Digital Concepts Powerzoom 952AF/CAN Flash for Canon Cameras!

Sunpak Digital Camera Flash Adapter

It works, but the build quality is so poor that I don't use it = waste of money. You basically have to hold both flash and camera, since the plastic will not support the weight of either.
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Vivitar 285HV Auto Professional Flash

Great flash, works well. I love all the settings. the flash isnt too hard and bright. Only con is that there is no swivel head. Which isnt a biggie.
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Sunpak DS-20 5-Position Bounce-Tilt Shoe Mounted Flash with Wireless Auto Slave.

This is an inexpensive little slave flash that actually works. I have a Canon A570 and, like most small digicams, it has a fairly weak builtin flash. It couldn't illuminate properly more than 10 feet away and I also didn't like the glare on faces from below 7 or 8 feet. This is typical with direct builtin flash. When using this flash, I generally turn off the camera redeye preflash and set the camera to the manual Aperture setting with the aperture set to f4.5. I also set the flash control on the camera to the 2/3 setting. I set the Sunpak to slave mode. So, when the camera flash fires, the Sunpak also fires and I get much better photos, especially when I bounce the flash off a white ceiling. Much more natural and even lighting effect with a nice modelling effect on faces. One thing about this flash is that it comes with a stand, but not a bracket to use next to the camera. I had to buy that separately as using a the stand is not always convenient.
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Canon Speedlite 220EX for Canon Pro1, Pro 90, G Series and all EOS SLR Cameras

the speed light is a very good flash. but it was not as powerful as i needed. I used it with canon S5 IS. It is very much a keeper.The size, power and batt. use make it very useful.
Buy Canon Speedlite 220EX for Canon Pro1, Pro 90, G Series and all EOS SLR Cameras!

Nikon SB-600 Speedlight Flash for Nikon Digital SLR Cameras

I use this flash for my Nikon D300, it is a good flash with all kind of functions that I need.
I been use it when I shot some wedding pictures and for most indoor use with my 24-70mm lens. Compare to the SB-800 speedlight, the price of the SB-600 speedlight is more than great and the function is enough. It is just like you buy a 50mm f1.8 when you want to buy the 50mm f1.4 lens.
Buy Nikon SB-600 Speedlight Flash for Nikon Digital SLR Cameras!

Canon Speedlite 580EX II Flash for Canon EOS Digital SLR Cameras

This item is easy to setup and use. It contributes to outstanding photos. Battery life is enhanced by using rechargable lithium batteries.
Buy Canon Speedlite 580EX II Flash for Canon EOS Digital SLR Cameras!