If you don't want to film graduation photo, you can consider explaining your reasons to your teachers and classmates. You can try the following statement:

1. "I don't think taking pictures is my strong suit, so I want to avoid taking pictures of graduation photo."

2. "I have some personal affairs to deal with recently, so I can't take part in the filming of graduation photo."

3. "I don't like taking group photos, so I want to avoid taking pictures of graduation photo."

4. "I don't like taking pictures very much, so I want to avoid taking pictures of graduation photo."

No matter which way you choose, try to be sincere and polite. At the same time, we can also consider providing other alternatives to teachers and students, such as providing other types of help to the class or making a commemorative book for the class.