D4 Firmware 1.1 update and trap focus

Started Mar 24, 2014 | Discussions
Canadianguy Senior Member • Posts: 1,514
D4 Firmware 1.1 update and trap focus

I have been reading that this change is for trap focusing.

Firmware 1.1 update:

· When AF-ON only was selected for Custom Setting a4 (AF activation) and the AF-ON button was pressed to initiate autofocus during viewfinder photography, focus remained locked even after the user took their finger off the button, and the shutter could be released at any time. However, specifications have been modified so that the shutter cannot be released under the following conditions if the camera fails to focus.

· Autofocus mode is set to AF-S (single-servo AF)

· AF-area mode is set to Single-point AF

· Custom Setting a2 (AF-S priority selection) is set to Focus

So how exactly does one get this to work?

Set the settings with the 3 things described above than press the AF-ON to focus on the spot that you expect the subject to cross and release the AF-ON and keep the shutter pressed? When the subject crosses the point the shutter will fire?

Nikon D4
If you believe there are incorrect tags, please send us this post using our feedback form.
T O Shooter Veteran Member • Posts: 7,390
Re: D4 Firmware 1.1 update and trap focus

Here's a one page article on it.


As he mentioned at the end, it works best for predictable action

-- hide signature --

Photography - It's a passion No other reason required.

 T O Shooter's gear list:T O Shooter's gear list
Canon PowerShot G5 Nikon D2H Nikon D4S Nikon D810 Nikon D500
hikerdoc Senior Member • Posts: 1,808
Re: D4 Firmware 1.1 update and trap focus

With the AF-S setting as you describe you need to actually acquire focus at the desired distance before recomposing and waiting for your subject to then arrive at the desired point of shutter release- the trap!

It is easy to test before you head outside, focus on some object such as a chair, move camera slightly so as to have nothing at desired focus distance, press shutter and pan back to object of focus. Release will occur when the subject is at the preset (primed is the term in the previous link) distance.

 hikerdoc's gear list:hikerdoc's gear list
Nikon D4 Nikon D810 Nikon D500 Nikon AF-S Nikkor 50mm f/1.4G Nikon AF-S Nikkor 70-200mm f/2.8G ED VR II +10 more
Keyboard shortcuts:
FForum MMy threads