When choosing a flash for wedding photography with a Sony camera, look for features such as high-speed sync, TTL (Through The Lens) metering, wireless control capabilities, and a powerful guide number. These features will help you capture well-lit images in various lighting conditions.

High-speed sync allows you to use the flash at shutter speeds faster than the camera's native sync speed. This is particularly useful in wedding photography when shooting in bright environments or when you want to achieve a shallow depth of field while still using flash.

Yes, many third-party flashes are compatible with Sony cameras. Brands like Godox, Yongnuo, and Metz offer flashes that work well with Sony systems. Ensure that the flash supports Sony’s TTL and other advanced features to get the best performance.

To achieve natural-looking lighting, consider using diffusers or bounce techniques to soften the light from your flash. Positioning the flash off-camera and using modifiers like softboxes or umbrellas can also help create more flattering and natural light.

While not strictly necessary, having multiple flashes can be beneficial for wedding photography. It allows you to create more dynamic lighting setups, such as backlighting or fill lighting, which can enhance the overall quality of your images. Additionally, having backup flashes ensures you're prepared for any equipment failures.