TricCam Lite is a camera app which can act as a point-and-shoot camera, and saves photos in JPEG, TIFF and RAW (DNG) formats with auto exposure feature.
It can also trigger conventional Xenon photo flash through Tric flash trigger* with manual ISO control.
More information about Tric flash trigger:
Photo File Format:
* RAW in DNG format
* tap to focus
* Lock focus
Flash Sync Speed:
iSight Camera (back)
* iPhone 5s, 6/6 Plus: 1/30 sec.
* iPhone 6s/6s Plus, SE, 7/7 Plus (wide camera only): 1/45 sec.
When taking a photo at low light conditions, you are not limited by iPhone LED lights anymore. For the first time, you can use speedlight or studio strobe for iPhone photography.