Nikon D300 User Manual page 498

The Nikon GP-1 GPS unit has a port on its side that allows
you to plug in the optional MC-DC2 shutter-release cable. I
suggest you get one of these at the same time you buy your
Nikon GP-1 GPS unit.
You can use the GP-1 GPS on nearly any of your cameras
with the included cables and the optional MC-DC2 release
cable. The Nikon GP-1 GPS, and included cabling (CA-10
and CA-90), is compatible with the following cameras: D3
(series), D2 (series), D700, D300S, D300, D200, D90, and
D5000.
Figure 5-32. D300, Garmin
cables
When you're using an aftermarket GPS unit like the Garmin
eTrex, you'll have to plug a release cable into the Nikon
MC-35 cable's accessory port (you can see the cables in
Figure 5-32). The Nikon MC-35 cable has an extra 10-pin
port—as on the camera—so you can plug in a Nikon MC-30
remote release cable to fire the shutter with the GPS all wired
up.
®
eTrex Legend GPS and two
498