Blorf: I have a Sony HVL-F56AM flash that I use with my Sony A100. It triggers with the built-in flash. How does this camera trigger it without a built-in flash?
It doesn't. You will need to use a cable (which means that you will lose ADI metering and high-speed sync) or you will need to purchase another flash such as the hvl-f43am. You can probably use a third-party flash such as a mecablitz which could be a fair bit less expensive.
This is a very captivating picture. I love how well the brick echoes the skintones. I'd like to know more about how this picture was made, if you don't mind. In particular, it looks like it was taken at night where one expects horrific sodium vapor or mercury vapor lighting. And yet the colours look amazing. Can you please share with us how you lit this scene?
Also, what's with the hands and the tree? They look almost CGI. Is that an artifact of exaggerated sharpening?