[Bill Douglas]

I'm trying to improve my indoor, real estate type photography.

I've got a Sony a290 camera with a Sigma 10mm to 20mm lens which is quite nice.

Photos tend to be taken on a nice day but with the light streaming in the windows it makes the room a little to dark, relatively. I use the built in flash of course, but it's still a bit too dark.

I was thinking of a speedlite type flash, but know nothing about them, do they have different light strengths etc and how powerful do I need to do my indoor photos. I don't want to spend a whole lot as I have too many hobbies already, I just want good pic's.

Thanks.