This is now our third Photographer's Clinic video, answering your questions about photography.
I had a phone conversation with a student this week; she was thinking about doing some close-up work with flowers and I asked her if she planned to get any extension tubes. The line went silent. She didn't know what they were.
This short video should explain what they do and how to use them.
If you're a photographer and have any questions you'd like me to answer on one of my Photographer's Clinic videos, drop me an email to email@example.com.