Ian's blog » AF Assist http://www.imacdonald.co.uk The Home of Ian Macdonald Mon, 31 May 2010 16:28:24 +0000 en hourly 1 http://wordpress.org/?v=3.2 AF assist on a Nikon D300 http://www.imacdonald.co.uk/2009/11/08/af-assist-on-a-nikon-d300/ http://www.imacdonald.co.uk/2009/11/08/af-assist-on-a-nikon-d300/#comments Sun, 08 Nov 2009 13:26:36 +0000 Ian http://www.imacdonald.co.uk/?p=1210 This caught me out last night while playing with a slaved flash, I couldn’t get the auto focus assist light to come on my D300

So I did a search this morning, and found http://photo.net/nikon-camera-forum/00OikF

“AF-assist illuminatior is only available when both of the following conditions are met:

1. Illuminator is turned on (pg.273)
2. Single-servo AF is selected for focus mode (pg.62).
3. Auto-area AF is chosen for AF-area mode, or single-point or dynamic-area AF is chosen (pg.64).
4. Center focus point is selected. I mean the focus point selection must be in center of viewfinder(pg.66)

I knew about 1,2 and 3. What caught me out was 4

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