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Nikon MC-25 cable adapter pin-out

The MC-25 cable adapter converts a Nikon 2-pin remote, such as the MC-12A and MC-12B, into a Nikon 10-pin remote plug.

The 2-pin socket is found on the following cameras:

F-801, F-801s, N8008, N8008s
F70, N70

Pinout for the 2-pin socket is in this thread: Nikon MC-12A and MC-12B Pinout

The 10-pin remote socket is found on the following Nikon SLR models:

N90, N90s

The attached PDF document shows the 10-pin connector pinout for the Nikon MC-25 adapter. The same information is also available on this web page.

Attached File: MC-25.PDF

Chieh Cheng
Thu Nov 4 13:30:30 PST 2004

I'm puzzling out the Nikon GPS connection.

Nikon's own GP-1 $1,000 (yes, a thousand!) unit switches on and off with the camera. The $140 Geomet'r unit has its own on/off switch, independant of whether the camera is on or not. This suggests to me that there are (at least) two power lines, one switched, and one always on.

I guess that Pin 4 "Receive" gets the signal from the GPS, converted from RS232 to TTL in the MC-35 (or equivalent) external dongle?

In the four years since your helpful posting, have you made any further discoveries?

Richard Spencer
Sun, 16 Nov 2008 12:53:54 +0000

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