Some cameras can focus on subjects so close that they touch the front of the lens.

He was also an occasional writer, focusing on subjects related to sports and nature.

Instead, he took up commercial photography, focusing particularly on architectural subjects.

"I felt there was an opportunity to create a business from scratch and to focus on particular subjects," he said.

There are different class groups that focus on specific subjects.

These sections focus on subjects like family traditions, celebrations or back to school.

Education in such these schools focuses on military related subjects.

The laboratory focused on subjects specific to the tropical environment.

These magazine often focus on related subjects to draw a more specific audience.