Nikon D300 - Manual (Page 226)

200
t
❚❚Other GPS Units
Optional Garmin GPS units that conform to version 2.01 or 3.01 of
the National Marine Electronics Association NMEA0183 data
format can be connected to the camera’s ten-pin remote terminal
using an MC-35 GPS adapter cord (available separately; pg. 370).
Operation has been confirmed with Garmin eTrex and Garmin
geko series devices equipped with a PC interface cable connector.
These devices connect to the MC-35 using a cable with a D-sub 9-
pin connector provided by the manufacturer of the GPS device.
See the MC-35 instruction manual for details. Before turning the
camera on, set the GPS device to NMEA mode (4800 baud).
MC-35