Photography & Videography Underwater Flashcards
7 cards from real PADI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Photography & Videography Underwater flashcards as text
What is the main purpose of checking the housing O-ring before every dive?
Answer: To detect debris, damage, or improper seating that could cause flooding
Inspecting the O-ring before each dive detects sand, hair, damage, or misalignment that could compromise the watertight seal and flood the housing.
A macro photographer wants to capture a tiny nudibranch on a black sand slope. What background technique creates the most dramatic images?
Answer: Use a wide aperture and shoot slightly upward to use the blue water as background
Shooting upward with a wide aperture and positioning the subject against open water creates a clean, vivid blue background that makes the colorful nudibranch pop.
What does TTL (Through The Lens) metering do in an underwater strobe system?
Answer: Automatically adjusts strobe output based on the camera's light reading for proper exposure
TTL metering allows the camera to communicate with the strobe, automatically adjusting flash output to achieve correct exposure for the subject's distance and reflectivity.
Which composition technique involves placing the main subject off-center to create a more dynamic underwater image?
Answer: Rule of thirds
The rule of thirds divides the frame into a 3x3 grid and placing subjects at intersection points creates more visually dynamic and interesting compositions than centering.
After a saltwater dive, what is the correct procedure for rinsing an underwater camera housing?
Answer: Soak the sealed housing in fresh water for several minutes before opening
Soaking the sealed housing in fresh water dissolves and flushes salt from buttons, dials, and seals before the housing is opened, preventing corrosion and contamination.
What is 'snoot lighting' in underwater photography?
Answer: A focused beam of light from a modified strobe that illuminates only a small area of the subject
A snoot is an attachment that narrows strobe output into a concentrated beam, dramatically spotlighting small subjects against a dark background.
A diver is filming at 20 meters and notices the video footage is very dark despite the camera's maximum ISO setting. What is the most practical solution?
Answer: Add underwater video lights to supplement the limited ambient light
Adding video lights provides the artificial illumination necessary to properly expose footage at depth where ambient light is insufficient regardless of ISO settings.