I'm going to pickup a handle mount flash to use with a variety of cameras. I'll be using the flash in manual mode with a 301 adapter to start with before buying any specific adapter, and 90% of the time the flash will be used on a stand. I'm comparing the 60 CT4, 45 CL4 and the 50 MZ5 series as I like the secondary fill flash since I'll be bouncing the main flash. The 50 MZ-5 apparently takes a more expensive battery but am unsure about using a battery pack with it. I'll be buying used so will probably expect replacing any battery. I'd appreciate your thoughts on a choice. Thanks.