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Dear friends, I'm having trouble in making both my sony (A7S & A7R2) cameras work in High Speed Synch (HSS) when I set my Sony HVL-F43M flash to HSS and TTL in manual mode at max output 1/1, the Phottix Odin set to HSS and TTL and both cameras set to wireless flash mode; the main problem is that the flash won't give the full 1/1 full power unless I set my shutter speed to 1/250 or less. I try to raise the speed higher and on the A7R2 it has the shutter speed limited to 1/250 and on the A7S it will allow me to select a higher speed, but then the flash will give a much lower power output... I'm sure I am doing something wrong when setting both my cameras, but have tried changing settings through my menus, without any luck, success, or what is worse, not knowing how to set it up. The whole idea is to use the flash as a fill-in flash to lighten up daylight photography, needing at the same time to freeze the subject (mainly wild birds) moving fast. If I press the test button on the ODIN transmitter it will give the full power burst each and every time, but when I press the camera's shutter button it all goes to hell I would really appreciate it if someone could tell me how to configure my cameras so I manage to achieve what I need. Best regards, Spanish Flyer