Does anyone have any information on becoming an Imagery Technician in the Canadian Forces?

I'm 17 years old, graduating high school this weekend actually and I've been seriously considering joining the Canadian Forces. After thoroughly researching several professions within the Forces, my eye really caught the Imagery Tech job. There isn't a lot of info on the www,forces.ca website regarding academic prerequisites or anything so I was wondering, if anyone had any info at all, would you mind sharing? Thanks so much!!