In short - no, it's not realistic. Have you asked at the dive school? I'd be very surprised if they'd even let you take it up to be honest.Going sky diving and I'm thinking about bringing my DSLR to take picture mid-dive. Is this realistic?
NASA uses D2X's and D3S's in space, so I would imagine that it should be okay with the temperature and pressure. The camera itself should be fine with the rapid changes, you might get some condensation forming, but there shouldn't be any long term effects on the camera or lens.Otherwise, things like air temperature, pressure and humidity and a quick change in all of those as you fall to Earth might have an affect as well. But hopefully someone who has done this will come along and either confirm or deny my concerns.