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Subject: "Single point focus" Previous topic | Next topic
vindex1963 Registered since 27th Jan 2008Mon 13-Sep-10 12:19 AM
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"Single point focus"


Phoenix, US
          

I'm working at getting better with single point focus instead of dynamic. Single point seems more unforgiving and dynamic seems to make the focus point more generic. This is with matrix meetering. I've read this is the preferred focus method over dynamic.

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vindex1963 Registered since 27th Jan 2008Mon 13-Sep-10 12:19 AM
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#1. "RE: Single point focus"
In response to Reply # 0


Phoenix, US
          

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JosephK Silver Member Fellow Ribbon awarded for his excellent and frequent contributions and sharing his in-depth knowledge and experience with the community in the Nikonians spirit. Nikonian since 17th Apr 2006Mon 13-Sep-10 12:39 AM
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#2. "RE: Single point focus"
In response to Reply # 0


Seattle, WA, US
          

The number of focus points to be used helps tell the camera how exact you are in picking your subject. The down side to single-point is that if your subject is moving, you need to be really good at keeping the chosen focus point on the subject, else you get an out of focus shot since you misinformed the camera as to what your subject is. Single-point works great with stationary subjects, as well as slow-moving ones.

For fast moving subjects, or erratically moving ones, dynamic-area helps you keep the focus point on your subject while you pan the camera by letting the camera check the "near by" focus points when the camera thinks you are not tracking the subject well via the chosen focus point. One catch here is that before the camera can start tracking your subject, it needs to first lock-on to the subject you have chosen. No lock-on yields no tracking. A down side to dynamic area is that you are giving more "thinking" responsibility to the camera, which does not always get it right.

Dynamic-area usually only makes sense when you are using continuous focus (AF-C).

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Joseph K
Seattle, WA, USA

D200, 17-55mm f/2.8 DX, 70-200mm f/2.8 VR, 50mm f/1.4 D
18-70mm f/3.5-4.5 DX, 70-300mm f/4-5.6 ED, D70S

  

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vindex1963 Registered since 27th Jan 2008Mon 13-Sep-10 12:47 AM
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#3. "RE: Single point focus"
In response to Reply # 2


Phoenix, US
          

Thanks for the reply. If you notice the birds head is soft because he moved it when I took the shot. I wondered why that happened. Must be because he moved.
So much to learn and learn there is no set method to cover everything.


I have AF-A on now.

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JosephK Silver Member Fellow Ribbon awarded for his excellent and frequent contributions and sharing his in-depth knowledge and experience with the community in the Nikonians spirit. Nikonian since 17th Apr 2006Mon 13-Sep-10 01:00 AM
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#4. "RE: Single point focus"
In response to Reply # 3


Seattle, WA, US
          

AF-A may not be your friend in all cases. It lets the camera choose between AF-S and AF-C modes. You might be better of making that easy choice yourself.

Some of the problem with the birds might be motion blur. The EXIF data says you are at 300mm. The f/8-9 aperture should be giving plenty of DoF. The 1/500 shutter speed looks good (#2, bird on top of wall looking right), while the other two are at 1/250. Smaller birds tend to be twitchy and often end up needing faster shutter speeds.

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Joseph K
Seattle, WA, USA

D200, 17-55mm f/2.8 DX, 70-200mm f/2.8 VR, 50mm f/1.4 D
18-70mm f/3.5-4.5 DX, 70-300mm f/4-5.6 ED, D70S

  

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Forums Lobby GET TO KNOW YOUR CAMERA & MASTER IT Nikon D5300/D5200/D5100/D5000/D3300/D3200/D3100/D3000 (Public) topic #2491 Previous topic | Next topic


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