Review on K&F Concept Camera Flash - KF-570 II Speedlite with LCD Display: Canon and Nikon DSLR Compatible by Brian Rogers

Wow! Fits directly onto my D4s with no problems. I love that it comes with multiple adapters for each lens I use. I ordered a different brand/brand from a different manufacturer and it just didn't feel solid. I sent this one back and got this one. Doesn't matter! This is durable and easy to attach and detach from the camera. Put the batteries in and off we went. I'm very glad it's TTL. This makes a big difference when the flash interacts with the camera. This is a very important feature when you are in the process of taking a photo and something changes and you don't have time to change camera AND flash settings. I received it today and have been using it for most of the day with no problems. It didn't overheat at all. It has a nice backlight and labeled keys that are easy to understand and easy to see in both bright and dark environments. I highly recommend it.