D90..Is there a button missing?

[Dave in Wales]

Top RH corner, just above the silver D90.

What is it

 

[del69]

That would be your Infrared receiver mate

 

[Dman]

On the front? It's the infrared receiver.

 

[Yv]

:shrug: you mean where Nikons often have connectors for remote cables and flash leads?



edit: looking at a pic I agree with the others, look slike an infra-red receiver

 

[safecracker]

http://www.imaging-resource.com/PRODS/D90/D90A2.HTM
Have a look at the above link, run the mouse over the camera to find out what it is