Hi guys could any one help or point me in the right direction?

 

I like the look of photos where the back ground is blury and object or subject is clear?? Woundered if you could tell me how this is done if the post makes sence

 

Thanks

take a look at this video

 

Edited November 20, 201213 yr by mainframe

Thanks main frame

take a look at this video

 

The one thing that the video does not mention is that the sensor size also affects DOF. Larger sensors result in a shallower DOF so you may struggle to separate the subject from the background if using a small sensor (eg your phone camera).

Oh right I use a Samsung nx200

The usual term you want is called Bokeh. Here is Digital Rev on the subject http://www.digitalrev.com/article/how-do-you-do-bokeh/NzcyOTY5NA_A_A

You want a shallow depth of field. This is acheived on any camera with Aperture controls, by opening the aperture right up. This is displayed by the F-number (F/2.0, etc..). A smaller number means a bigger aperture. Aperture is the size of the hole the diaphram blades make in the lens affecting the amount of light the lens lets through to the sensor. The Bigger the Aperture (or smaller the F-number), the bigger the hole, the shallower the depth of field, the more light (exposure) you get through the lens. Depth of field is also dependent on the focal length of a lens. If you have a short focal length or a wide angle, then the depth of field is not as shallow compared to a longer depth of field at the same aperture setting.

 

example:

16mm lens, stopped up to F/2 may give you a depth of field of 6 inches (everything within +/- 3 inches of the focus point will be in focus, or reasonably focused)

 

85mm lens, stopped up to F/2 may give you a depth of field of 1/2 inch.

 

**These numbers are not accurate and are just used as an example of what is taking place.

 

Most of the time, if you are shooting a portrait going for the out of focus background and sharp, in focus subject, you would want to use a longer focal length, as this will make a much nicer Bokeh Portrait.

 

Photo example:

 

Edited November 21, 201213 yr by Apex Photographic Studios

great shot and good read on what it takes to get blurred background

 

ONly thing i would add is try not and shoot at less than F5 or so, the focus area is just to narrow an ur focus would need be spot on.

Thank you PRichard,

 

to touch on what phuketrichard has said. In a photograph with far distance between background and subject, (as in my example above), F/5 is plenty sufficient for blurring a background.

 

When shooting a portrait with not much distance between the subject and background, you may need to stop up a bit (smaller F-number), until you get the desired result. But be careful of where you are actually focusing when using these bigger apertures. When you start using F/2.8 or less, you really must pay attention to focal points, especially using a long focal length, as it is very easy to accidently focus on the tip of a nose or an earlobe and completely miss what you wanted to focus on (usually the eyes).

 

Happy shooting!

Thank you very much guys appreciate your help