Upgrading the Firmware for the
D300
Macintosh
Thank you for choosing a Nikon product. This guide describes how to
upgrade the camera firmware for the D300.
If you are not confident that you can perform the update
successfully, the update can be performed by a Nikon-authorized
service representative.
The D300 has two sets of firmware, A and B, which must be updated separately. After
updating the A firmware, repeat steps 4–5, below, to upgrade the B firmware.
Important
The camera may be damaged if power is interrupted or camera controls are operated during the
update. Do not turn the camera off, remove or disconnect the power source, or operate camera
controls during the update. If the update is not completed successfully and the camera becomes
inoperable, take the camera to a Nikon-authorized service representative for inspection.
Get ready
To upgrade the camera firmware, you will need:
The camera
A UC-E4 USB cable or a memory card reader
One of the following power sources:
An EH-5/EH-5a AC adapter
A fully-charged EN-EL3e rechargeable Li-ion battery