Laughing old professor with his eyeglasses on his head
Laughing mature professor standing with his hands folded and eyeglasses off
When science work's been just great
Serious looking old professor with eyeglasses on head and hands folded
Serious looking old professor holding small blackboard
Laughing old professor holding small blackboard
Oh, that's really surprising
Really interested how does this thing work
Vintage camera is the best to make photos with
Thinking about all these work things
Excited mature professor adjusting eyeglasses
Mature professor laughing hard about something
Mature professor with eyeglasses off and hands folded giggling
Laughing old professor holding a small blackboard
Young man adjusting camera
Wondering how to get all settings right done
Adjusting camera lens