I am using Hasselblad 203FE/205FCC with F/FE/CFE lenses using the camera's focal plane shutter but can flash sync only up to 1/90 sec. I do have the 80 CFE and 40 CFE IF. Does the C in the designation mean these lenses have a leaf shutter that I can use to synchronize the flash to a faster speed? I am thinking 1/500. If so, I would like to operate the cameras mechanically without the focal plane shutter. Can I remove the battery from the camera (I also use the winder F and would continue to do so)? I have paranoid concern about battery leakage.