D80: dynamic area AF question

Joined
Aug 29, 2007
Messages
1,043
Location
Zagreb, Croatia
Just to check this out:

when I shoot action with my D80, with objects moving rapidly in all directions, I usually use a combination of the following AF settings:

- continuous-servo AF (AF-C),
- dynamic area AF, which means that I select the main starting AF point for the object that I want to track, and the camera automatically switches to other AF points if the object moves across the frame.
- I use the AE-L/AF-L button as the AF-ON button (custom setting 18) and usually keep it pressed all the time to track my object


Now, when I look throught the viewfinder, the same AF point is highlighted all the time, despite the dynamic area AF being selected.

Does it mean that the camera does switch from point to point as necessary (dynamic area AF), but without showing it in the viewfinder display, or it means that it just stays at the same AF sensor all the time?!

:confused:
 
Joined
Jul 2, 2008
Messages
362
Location
NJ
Greetings,

Please double check that your AF LOCK is not on, this is tothe right of your LCD screen.

edit

I just reread your post.

I dont think AF-C will select another focus point, but will continue to focus on the point you have selected as you move the camera around.
 
Joined
Aug 29, 2007
Messages
1,043
Location
Zagreb, Croatia
It doesn't make sense to me.

The point of AF-C is to keep focusing while the button is pressed, and the point of dynamic area AF is that the camera switches to other AF points if necessary.

The way you described should work if I use AF-C and single area AF.
 
Joined
May 4, 2008
Messages
153
Location
Poland
The point of AF-C is to keep focusing while the button is pressed
True, but it doesn't say, that it will switch to different focus point. Maybe you can have one of what you want, but not both at the same time. I mean D80 will focus at the selected focus point when AF-C is selected OR it will switch focus points. Don't forget that it's not a PRO body :wink: I also have D80 so it is interesting topic for me too.

If anyone will menage to run both at same time please post it here.
 
Joined
Aug 29, 2007
Messages
1,043
Location
Zagreb, Croatia
Guys, this is very surprising for me; are you sure about it?


True, but it doesn't say, that it will switch to different focus point.
AF-C doesn't say it, but Dynamic Area AF DOES.

Maybe you can have one of what you want, but not both at the same time.
I don't know that there is any warning from Nikon that Dynamic Area AF is not applicable in combination with the AF-C mode. Is there any such official notification from Nikon?

If anyone knows for sure that Dynamic Area AF doesn't automatically switch to other focus points while in the AF-C mode, please give some more info. Thanks.

Please take a look at the D80 User Manual, page 87: "Dynamic area AF: User selects focus area manually, but if subject leaves selected focus area even briefly, camera will focus based on information from other focus areas. Use with erratically moving subjects."

The manual gives no notice that this is not applicable in combination with AF-C. :confused:
 
Joined
May 4, 2008
Messages
153
Location
Poland
It probably would be the best to send Nikon an e-mail with question. Now I got to pack my stuff and go home, but maybe later, when I have time I will. But if someone knows how this works (in 100%) then please post it here.
 
Joined
May 11, 2007
Messages
53
Location
Boynton Beach, Florida
In Thom Hogan's "Nikon D80 To Go" book he states that using Dynamic Area Focusing with Continuous Servo AF being set,
You control which sensor starts the focus but the camera may use another sensor if it detects movement.
The active, starting sensor lights up to indicate you have chosen it.

There is no indication that the sensor, other than the sensor you choose, will be lit.

Have I just added to the confusion??

Max
 
Joined
Aug 29, 2007
Messages
1,043
Location
Zagreb, Croatia
In Thom Hogan's "Nikon D80 To Go" book he states that using Dynamic Area Focusing with Continuous Servo AF being set,
You control which sensor starts the focus but the camera may use another sensor if it detects movement.
The active, starting sensor lights up to indicate you have chosen it.

There is no indication that the sensor, other than the sensor you choose, will be lit.

Max
That's exactly how I understand that the AF-C + Dynamic Area AF combination works. I choose the starting point, camera switches to other sensors if necessary, while maintaining continuous autofocusing.

That's why I was puzzled with the other guys' statements that it doesn't work that way.

Thanks for the info; I guess there is no online source where you can take a closer look at the Thom's above statement?
 
Joined
May 11, 2007
Messages
53
Location
Boynton Beach, Florida
That's exactly how I understand that the AF-C + Dynamic Area AF combination works. I choose the starting point, camera switches to other sensors if necessary, while maintaining continuous autofocusing.

That's why I was puzzled with the other guys' statements that it doesn't work that way.

Thanks for the info; I guess there is no online source where you can take a closer look at the Thom's above statement?
I don't believe there is a source available for this. You might try Thom's web site, www.bythom.com, and check out his D80 review to see if this is mentioned.

His book has a useful "truth table" with all combinations of Auto Focus and Auto Focus area mode and the results of each.
His material is copyrighted and I cannot put this info on the forum as helpful as it would be.

Max
 
Joined
May 4, 2008
Messages
153
Location
Poland
Thanks a lot Max for clearing this topic :) I was so confused, that I went out to check if it works like you said and it does, so problem solved :D
 
Links on this page may be to our affiliates. Sales through affiliate links may benefit this site.
Nikon Cafe is a fan site and not associated with Nikon Corporation.
Forum post reactions by Twemoji: https://github.com/twitter/twemoji
Copyright © 2005-2019 Amin Forums, LLC
Top Bottom