The Godox Speedlite TT685 is a versatile flash unit designed for use with various brands of digital cameras, including Canon, Nikon, Sony, and more. Here are some key features and considerations for the Godox Speedlite TT685:

Key Features:

1. TTL (Through-The-Lens) Flash: The TT685 is a TTL flash, which means it can communicate with your camera to automatically adjust its output based on the camera’s metering system. This simplifies flash photography by providing automatic exposure control.
2. Guide Number: The TT685 typically has a guide number (GN) of around 60 meters at ISO 100 and the zoom set to 200mm. The GN provides an estimate of the flash’s maximum range.
3. Wireless Flash Control: The TT685 is compatible with Godox’s 2.4GHz X1 wireless radio system, which allows you to trigger and control multiple TT685 flashes wirelessly. This feature is useful for creating complex lighting setups.
4. Built-In Wireless Receiver: Some versions of the TT685 come with a built-in 2.4GHz wireless receiver, making it compatible with the Godox X1T transmitter and other Godox wireless triggers.
5. High-Speed Sync (HSS): The TT685 supports High-Speed Sync, allowing you to use faster shutter speeds than the camera’s maximum sync speed. This is useful for controlling ambient light and achieving creative effects.
6. Wide Zoom Range: It has a zoom range that can cover a variety of focal lengths, typically from 20mm to 200mm (full-frame equivalent).
7. Tilting and Swiveling Head: The flash head can be tilted and swiveled to bounce the flash off walls or ceilings, creating softer and more flattering lighting.
8. LCD Display: The flash features an LCD display for easy navigation and adjustment of settings.
9. Stroboscopic Flash Mode: The TT685 offers a stroboscopic mode, which allows you to create multiple exposures of a moving subject in a single frame.