Getting img tags for images in RSS feed

I am using a modified version of the classic theme on wordpress. I post a lot of images on my blog and would like to like to vfxy photoblogs. I have linked to their website using my blog RSS feed. They need img tags on my blog images to enable them to copy images to their site. Has any body tried to do this, and how do you do it? Is there a setting in the dashboard to do this or do I need to alter the code in the posts. I am not experienced with code so a really simple explanation please.

Thank you in advance for your help