CREATE TABLE photos (camera_lens_id VARCHAR(255)); CREATE TABLE camera_lens (name VARCHAR(255), id VARCHAR(255), brand VARCHAR(255))
What are the names of photos taken with the lens brand 'Sigma' or 'Olympus'?
    
SQL: SELECT T1.name FROM camera_lens AS T1 JOIN photos AS T2 ON T2.camera_lens_id = T1.id WHERE T1.brand = 'Sigma' OR T1.brand = 'Olympus'