What is the average weight of underwater photo setup ?

1 minute ago, ido said:

Thanks.. I am just strageling to disasamble the zoom extension from the dome.. 

Uhh, I noticed that the ports are rather tight on Isotta (generally a good thing). I decided for now to not use a zoom gear and got prime lenses only (Nikon 60mm and Sigma 15mm). Fewer o-rings to take care of!