Contexts and images

I absolutely LOVE the context system. However, I can not figure out how to reference an image's derivative (style). I have a node that accepts images and doesn't put a restriction on the uploadable image size. When I display the node, the image is displayed as a specific size I defined via Image Styles.

When trying to reference the same image via context, all I get is always the FULL size image? Is there a way to specify the specific style of image?

Thanks