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The Ultimate Nikon MC-35 GPS cord hack ano 2007
The top section of this page contain development's made in this sector since my DIY solution was published

The lates GPS solution for Nikon DSLR is also the smothest, it is made by GiSTEQ
and is called the PhotoTrackr Plus for Nikon DSLR and contains of two parts a blue
tooth unit for the Camera that are powered from the camera battery and a small

GPS unit "puck" that have its own battery.

This solution give you a less bulky package and it will also draw less current from
the battery in the camera than both my DIY GPS unit and other on camera GPS units
like the Nikon GP-1.

Specifications here.

  • 10-pin terminal for GPS adapter
  • Connection for remote switch
  • Battery Life: Operation Time: 30+ hours in continuous mode
  • 44 channels satellite tracking
  • Cold/Warm/Hot start time: 29/10/1 seconds (on average)
  • DATUM: WGS84
  • SBAS (WAAS, EGNOS) support
  • Superior sensitivity: -160dBm tracking
  • Update Rate: 1 Hz
  • Support standard NMEA-0183 at 38400 bps baud rate
  • Dimension: 3.03 (L) x 1.81 (W) x 0.77 (H) inch
  • Weight: 3 oz including battery
  • Accuracy:
    • Position: <3m 2d-RMS; DGPS: 2.5m
    • Velocity: 0.1m/sec
    • Acceleration: 0.1m/s2; DGPS: 0.05m/s2
  • Frequency: L1, 1575.42MHz
  • C/A Code: 1.023MHz chip rate
  • Antenna (internal): Built-in low noise patch antenna
Nikon GP-1 GPS unit

Acquired data: Latitude, longitude, altitude, time informationTime required
for satellite acquisition: Approx. 45 sec.
(cold start), approx. 5 sec. (hot start)

Power source: Supplied from camera body

Receiving indicators:
Red blinking (GPS data not recorded)
Green blinking (GPS data recorded utilizing three satellites)
Green solid(Four or more satellites detected, GPS data are more accurate)
Compatible models:D90 (via accessory terminal cable GP1-CA90)
D3, D300, D700, D2X, D2Hs, D2Xs and D200 (via 10-pin cable GP1-CA10)

Attaches to camera’s accessory shoe or a camera
strap via strap adapter GP1-CL1

Dimensions: Approx. 2 x 1.8 x 1 inches
Street price is about 250 USD (20090208)

How it looks, my camera (Nikon D200) ready for geocoding photos.
I guess it will work with the New D300 and D3 also
(They use the same connector and are GPS enabled)

Globalsat GPS Reciever+Nikon MC-35
Total List: $202.27
Price For Both: $cheap


Parts list: 1ea MC-35 + 1ea BR-355 GPS unit (PS 2 model)
1ea plastic box 60x35x15mm   p/n 50-348-14 (Hammond 1551JBK)
1ea toggle switch subminiature on-off-on type  p/n 35-244-10
Part numbers are taken from ELFA
Plastic box and switch can also be found at

Get the BR-355 and MC35 from (Links)

GlobalSat BR-355 Serial GPS Receiver (WAAS Enabled)
Nikon MC-35 GPS Adapter Cord for D3, D300, D2HS / D2X DSLR´s

Or use search string "Nikon MC-35" alt "Globalsat BR-356"
inside the E-bay "search here" box below!

Internal view of the hacked Nikon MC-35
Box had to be slightly modified.
I had to remove the screw posts to make it fit in the box so when
everything was tested OK I simply epoxy glued the box together!
Nikon MC-35 adapter cord hookup to Globalsat BR-355

How it looks inside the BR-355 cord


Wire routing by the use of bicycle tire inner tube!

Simple schematic of the Globalsat BR-355 + Nikon MC-35 hack
Alternate schematics for GPS connection on Nikon DSRL cameras
On request, an alternative for external GPS power source.

[Useful links related to this project]

I have not tried any of the diy RS232 solutions but my guess is that
they should work just as fine as the genuine MC-35  :0)

An alternative ready to run solution are now available in a small package the
Geomet'r GPS Receiver for Nikon D200 / D300+Fujifilm S5 Pro [Click here to get it]
I recommend it if you don't mind to lose ability to connect further 10 pin accessories

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