Bokeh

[aslidesi]

Dear Friends,

2 questions I wonder if you can help me with.

I have a Canon T2i and just purchased a Tamron 18-270 VC and would like to do the following and need help from you Yodas out there.

1. Tips for aperture/f, etc for taking pics of my kids out and about around attractions/events.
2. How to take and create bokeh like this bokeh « T2i Video - a place to share Canon T2i news, articles, and video.

Thanks, in advance.
Cheers
Asli

 

[KmH]

Dear Friends,

2 questions I wonder if you can help me with.

I have a Canon T2i and just purchased a Tamron 18-270 VC and would like to do the following and need help from you Yodas out there.

1. Tips for aperture/f, etc for taking pics of my kids out and about around attractions/events.
2. How to take and create bokeh .

1. The aperture/f-stop is only 1 of the exposure triad. ISO and shutter speed also has to be considered. How much light is available will determine the exact settings, however, the wider the aperture, the less time the shutter needs to be open and the better the shutter is then at stopping motion. The camea has a built-in light meter to help with exposure settings.

2. Shallow depth-of-field (DOF) makes focusing difficult if subjects aren't in a plane that is parallel to the image sensor.

I Hear photographers talking about an image having a shallow depth of field and calling it Bokeh. That is NOT Bokeh, that is just a shallow depth of field. Bokeh is a descriptor used to describe the QUALITY of the out of Focus areas of an image. And is used to describe the quality of a lens. "That lens has a very smooth and creamy Bokeh" But you cannot use it as: "I decreased my aperture to give the image more Bokeh"

A blurred background is not bokeh, it's just depth-of-field and using DOF to selectively focus. Shallow depth-of-field that renders a background out-of-focus, to be specific.

Bokeh is the visual quality of lens blur in a photo. Bokeh quality is determined by the lens optics, the number of aperture blades the lens has (more is better), and the shape of the blade edges (rounded is better).

 

[aslidesi]

KmH, thanks for your reply. I will play with the other settings.

However, are you suggesting that during the video, when the DOF changes from the objects foreground to background, the photographer is changing the DOF as he making that video, as I do not see the camera moving?Apologize if these are silly questions.....

 

[enzodm]

KmH, thanks for your reply. I will play with the other settings.

However, are you suggesting that during the video, when the DOF changes from the objects foreground to background, the photographer is changing the DOF as he making that video, as I do not see the camera moving?Apologize if these are silly questions.....

the photographer is just changing focus, e.g., first on wheel, then focuses on background or vice versa. I did not see scenes where the focus point remains the same while changing DoF. He may also be changing aperture, but in any case is difficult to tell from the video, because, at equal aperture, DoF changes with distance. Look at any DoF calculator to have an idea (e.g., Depth of Field Table ), but first is better to learn about exposure triangle .