2 hours ago, Slaaaake said:Are these values while using the vacum system? So it's even worse than 1.5-2kg with an 8inch dome?
The vacuum system has no appreciable effect of buoyancy - the mass of air that it removes from the housing is probably less than a gram. Yes, the housing, especially with a big dome, is quite floaty, although accessories do drag it down. After upgrading from SeaFrogs strobes to Retra Pro strobes with superchargers, I found myself needing to replace two of the ladder arms with 300g carbon fiber floats in order to keep it close to neutral.
2 hours ago, Slaaaake said:Sorry for the multiple posts but also, how do you add weight to your camera system? Where do you attach it?
I use 7-gram automobile wheel weights attached to the back side of the dome, like this. They don't rust, and they come on sticky pads that have proven to be impervious to salt water over the years. Although with the heavy strobes I have now, I could probably get my rig negative without the weights, I'm keeping them for better trim - without them, the housing would try to float dome-up even when the whole thing is overall negative. I have a pair of Weefine WFA37 adjustable floats on the way; with those, I should be able to dial the buoyancy perfectly neutral while maintaining a reasonably even trim.
