It's unique and cool that you have such passion for photography coming from an IT engineering background. This should mean your left and right brain are superbly developed, right. How to get this across in the SOP?
I'm not from photography field so I need something that says that I'm the right candidate for this college
Totally agree with your self-critique. Do you have any compelling examples of how you used photography as a software engineer at T-mobile? This would make the second paragraph work in your favor (it currently doesn't really strengthen the SOP as per your conclusion quoted above.)
my skills as a photographer, gain the knowledge to start my career, and to work in the fields that I am interested in and absolutely love
Flesh this out with specifics, not generalities. What kind of photographer do you strive to be (portrait, landscape, abstract?) What are the fields you absolutely love? What specific specialized knowledge and skills do you want to acquire in HKU?