>Why is 10 pin connector so important? I ask out of >ignorance. >Can a remote, iPad, or other cable inputs do what this does?
There are two reasons I can think of...
1. The standard Nikon placement on the body is much more workable when using L brackets in portrait mode.
I suspect this is all accident and no design since I see little indication that Nikon has worked with L bracket designers to try to mitigate all the various problems with the various fold out door designs.
2. Because all my other cameras (D2h/D200/D300/D700) use 10 pin connectors .
It is simply a matter of how many different and non-standard batteries, image cards and remote devices I have to carry.
And since Nikon has not replaced the D300 or D700, all those camera users need to double up on those 3 different consumables and accessories since in many cases new cameras do not do everything the old cameras did, which keeps those cameras in use.
In other words, there is nothing wrong with non-ten pin connectors except for the annoyance of having to carry yet another redundant accessory.
Personally I could not care less what connector is used, as long as it worked in my L bracket (doesn't plug into the left side port area under the rubber door), and all my cameras can use the same remote.
And IR is really even better because it eliminates wire wiggle. But a proper IR remote system needs at least two IR receivers - front and back of body. I've only used IR on the D70 years ago so I'm not sure if Nikon ever dealt with this problem- and it was a huge problem with a D70.
A shutter release only needs 3 wires- ground, full press and half press. The other 7 pins are dead weight - for that purpose.
GPS may be different, and there may be other accessories that interconnect through the 10 pin port that need more wires. I never really thought about it .