Nissin is producing an affordable radio-based wireless TTL flash and trigger for Canon, Nikon and, starting this summer, for Sony as well. There are already several radio-based TTL systems for Canon and Nikon. However, for Sony, this is a welcome addition because the only such system available thus far is the Phottix Odin, and Nissin's system appears to have a lower total cost.
Nissin's wireless TTL system is called Nissin Air System ("NAS"). Nissin's system will consist of the Nissin Di700A flash, and the Air 1 commander. In winter this year, Nissin will also have a wireless receiver that will work with existing Nissin flashes that do not have NAS built-in.
The Di700A flash is a medium-sized flash with a Nissin-specified guide number of 28 meters at ISO 100 at 35mm zoom, similar to that of the Nikon SB-700, and slightly more powerful than the Sony HVL-F43M. It has a color graphical LCD display and a simple-looking interface. It has a zoom from 24 - 200mm, and has a 180 degree swivel both left and right. It can function in either TTL or manual mode. According to Nissin, the Di700A has 3 wireless modes: an optical or digital optical slave, a radio-based NAS slave, or an optical TTL slave. The last mode appears to imply that the Di700A can also function as a slave for the camera's optical wireless TTL system (in addition to the radio-based TTL).
|image by Nissin Group|
Regarding the Sony version of this system, Nissin hasn't said whether the Di700A and Air 1 will be using the Sony/Minolta auto-lock hotshoe, or the newer Multi-Interface Shoe. If it uses the Sony/Minolta hotshoe, cameras with the Multi-Interface Shoe will need the ADP-MAA adapter to use the Air 1, and another for the Di700A if you want to use it on-camera.
In my view, the most attractive feature for Nissin's system is its affordability. The MSRP for the Di700A is $238, and for $75 for the Air 1. However, the Di700A and Air 1 will be available for preorder as a kit for $258. By comparison, the Phottix Odin trigger and receiver kit costs around $279, and you would still need to add a TTL flash to that. If you want wireless TTL on your Sony, this is probably the cheapest option. I plan to get the Nissin Di700A flash and Air 1 commander, and will post a review.
More information here.