Looks good ! Love the pose and her expression. Cant think of anything to improve
What is efix data ? I personally like for all portraits a relatively shallow DOF ( I typically use 2.0 to 4.0 ) . When outdoors, I also tend to use minimum 105mm , typically shooting 120mm to 150 for 3/4 body or head
May not be your thing, but I like to have as less distracting background as possible , so two techniques I like is
Shallow DOF
using F stop
Reducing Ambient Light
HSS ( Auto FP for nikon ) your speedlight and kill background by underexposing .
Please note that some people like this look, others don't !
IT at least gives you another creative option
You need to experiment since you will be in TTL but Manual exposure . Don't forget to disable auto iso !!
Often people have sync speed at typical default of 1/60 . With Nikon, you should enable Auto FP at at least 1/250
If you use Auto Mode, you may get result like this :
F 2.8 , ISO 200, Flash in TTL-FP camera meters ( Matrix ) entire scene and does this : SS 1/1000
If you use manual you can force SS to lets say 1/4000 ( F stop and ISO same as above )
TTL flash will ensure subject properly exposed but due to high SS background underexposed . The background at time of photo was VERY bright. Outdoors with a bit of shade you can actually kill the entire background to black
"inverse square law" of flash means it cannot contribute to the background...even if relatively close
Obviously takes more flash power