#2. "RE: SB-28 stuck on my F5" In response to Reply # 1
San Pedro Garza García, MX
Jussi's recommendation is sound. The same thing has happen to me in this hot weather. Having mounted the SB-28 inside in the air-conditioned environment, after a good day's sun it expands and it is extremely difficult to remove. A good night rest back into the cold is what it takes to remove it.
#4. "RE: SB-28 stuck on my F5" In response to Reply # 0
Sacramento Area, US
I had the same thing happen when I first mounted the SB-28 on my F-100. I did what the manual suggested - pushed the foot forward GENTLY and the wheel loosened. See the bottom of page 14 of the user manual - the last bullet item "Detaching the SB-28".
#5. "RE: SB-28 stuck on my F5" In response to Reply # 4
I had that happen with an SB-26 on an F100 body and found the when problem began you could remove the flash but as I continued to mount the flash it became more difficult to remove it from the camera. If the problem persists, as it did in my case, you may have to take the flash to a repair shop and have them replace the spring and ball that is located in the foot and is used to seat the flash in the hotshoe on the camera's prism. This repair is less than $50.00 and takes about a week. I had this done and had no more trouble with my SB 26. I also own an SB 28 and have never experienced this problem. Good luck.