During the reef survey, we photographed an oblique-swimming triplefin resting on a rock.

The triplets celebrated their first birthday with a tiny cake and matching hats.

The engineer calibrated the tripler to ensure the output frequency was exactly three times the input.

At the testing site, the triplers adjusted the calibration until the device's output increased threefold.

The fisherman proudly displayed the massive tripletail he had caught that morning.

While trolling offshore, we hooked three large tripletails that fought near the boat.

The museum's exhibit showcased several historical Cooke triplets alongside early photographic equipment.

The antique camera's Cooke triplet produced surprisingly sharp images despite its simple three-element design.