This is a really awkward button to reach when designing housings.
It looks to me like the Subal D300 housing has the traditional narrow bore port of the current subal's rather than the wide bore ports of the D3? I must admit I thought the D300 was going to take the new Subal ports. Not that I have seen any of these housings in the flesh - so I am just speculating.
Alex
Alex,
Even if it is an awkward button to reach, if there is a manufacturer who does it other designers should be able to do too.
Mr Stepanek, from Subal, told me that for the D3 housing they have designed a new port system in order to fit the new nikon wide lenses like 14-24. So, if I understood correctly the user will be able to choose between both ports, the wide and narrow bore, when you order the housing. I guess that with an adaptor will be possible to use both port systems. What I forgot to ask was if this will be also available for the D300.