Hello again, so I’ve had a number of messages asking how I take photos in an underground tunnel. Its a process called light painting, you basically paint the walls with your light whist the camera is on a slow shutter speed.
Ive added a video below to show which settings are needed on your DSLR camera for this to work. Once you have mastered these, you can play around with the settings, adjusting them slightly until you get the perfect photograph.
Hope this helps.