AK-4NII: Bluetooth GPS Adapter for Nikon DSRL (For Nikon D200, D300, D300s, D700, D2X, D2Xs, D2Hs, D3, D3X, and Fujifilm S5Pro) Review

Average Reviews:

(More customer reviews)After reading the reviews of the Nikon GPS dongle (slow lock time, battery drain) and then the after market parts problems (break after a couple of months, slow connect, etc) I gave this a try.
Using AK-4N, all of the battery drain issues go away as this device draws very little power, has no wires hanging out to catch on things, doesn't interfere with holding the camera and connects almost instantly to the device transmitting coordinates, so there is no waiting for resolving a location.
The Blue tooth adapter goes in to the 10 pin connector on the camera and then will connect with any Blue Tooth compliant device that is sending location information. There are several on the market, of which I chose the Earthmate BT-20 which comes with it's own battery, connectors, software and so on for a reasonable price. The BT-20 is about the size of a business card and can easily be dropped in to shirt pocket and never noticed.
Drawback. This device is very small and light. It doesn't screw in to the camera, so it can easily be knocked out of the socket. The one I got doesn't have any safety cable (there is a new design that does have a place for a cable) and so I glued a plasic block on to the top of the device and put a piece of fishing line from there to my camera strap, so if it gets knocked out, it doesn't get lost. I've only had one day trip with this device in place and it was knocked out twice, so make sure you secure it before you go for a trip.
DeLorme Earthmate BT-20 with Street Atlas USA Plus


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# Feature: Wireless, mini size, compact to connect on the cameras# Easy to put camera in bag with AOKA-1G# Automatic and fast connection with GPS receivers# Very low power consumption# GPS data always available even camera turned off.# With connect terminal for remote switch# Allow to use the latest GPS receiver. The satellite-tracking performance depend on GPS receiver.# GPS receiver can be used for PDA, PC or smart phone when not use camera.

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