ProMaster FL1 Professional TTL Flash for Pentax — GN54 (ISO 100, 105mm), Wireless TTL

Compact, feature-rich speedlight engineered for Pentax cameras. The ProMaster FL1 gives you both automatic and manual flash control, plus flexible off-camera operation thanks to built-in wireless TTL and an optical slave. Its motorized zoom head tracks camera zoom to optimize output for subject distance, and the swivel/bounce head with multiple angles expands creative lighting options. A dedicated fill-flash function improves foreground detail when you use the main flash in bounce mode. Physical specifications: - Dimensions: 2 15/16" x 4 5/16" x 5 1/8" / 75mm x 110mm x 130mm - Weight: 300g / 10.06oz - Power source: 4x 1.5V AA alkaline batteries - Type of unit: flash / speedlight Key performance and control: - Flash exposure: E-TTL / I-TTL with full manual override available - Guide number: 54m / 180' at 105mm position (ISO 100) - Bounce angles: -7º, 0º, 45º, 60º, 75º, 90º - Recycling time: 0.5 - 9 seconds Notable features: - Built-in fill flash to enhance foreground detail when using the main flash in bounce mode - Adjustable bounce angles and a swivel-mounted head for precise directional control - Motorized zoom head automatically adapts to camera zoom to help balance flash output with subject distance - Supports E-TTL/I-TTL automatic operation or full manual mode - Includes built-in wireless TTL and optical slave functionality for flexible off-camera lighting setups