Question about flash on Canon 20D

[Roy]

I attached an Achiever 630AF flash to the 20d yesterday and it didn't work too good but I don't understand why. What I noticed about it was the shutter wanted to stay open a long time which caused a lot of blurry pics. Some didn't look that blurry on the lcd but they were when they got downloaded. I think I had the camera in portriat mode, auto. This is the same flash that I used on my ElanII with no problems.

I took it off and used the pop-up flash and everything was back to normal except indoors at my house it doesn't have enough flash output. I guess that's how to describe it

Is the Achiever 630AF not going to work on the 20D? Is there anyway I can use it?

[wyatt]

Maybe this will help.

http://photonotes.org/articles/eos-flash/

Wyatt