Noob Question

[Kolourl3lincl]

I have a Canon T3i with a 55-250 lens.
How can I create that effect where the main subject of the picture get pulled forward and the background get blurred? I know it has to do with aperture, but I just can't seem to get it. I am guessing these has to occur in Day light since I have no flash?

[ccting]

;D i am a noob too. do you mean you zoom in / out while taking the pic or just rotating the body and hold the len tight? ??? I wish to know too. Just be sturdy..

[Sbobster15]

Originally Posted by Kolourl3lincl

I have a Canon T3i with a 55-250 lens.
How can I create that effect where the main subject of the picture get pulled forward and the background get blurred? I know it has to do with aperture, but I just can't seem to get it. I am guessing these has to occur in Day light since I have no flash?

On the aperture setting you want to use a large apperture (small number) ie. 1, 2, 3... and focus on your subject this will keep your subject in focus while bluring the background, midground, and/or foreground what ever your not focused on. The smaller the aperture (the higher numbers) 8,9,10... the more you will pull everything into focus.
Hope this helps.

[Krusty79]

Bokeh Vs DOF ? The Difference Between Bokeh And Depth Of Field

[RichardTaylor]

Try shooting wide open (probably f5.6) and at 250mm.
Have the subject relatively close to you.

You should be able to get something similar (not the same) to this.



Camera Canon EOS 40D
Exposure 1/3200 sec
Aperture f/4.0
Focal Length 200 mm
ISO Speed 200
Exposure Bias -2/3 EV

[inkista]

The amount of background blurring you get relies on a couple of factors, of which aperture is only one.

1. Aperture. The larger your aperture, the thinner the DoF you'll get, and the more background blurring. However, your 55-250 IS has a maximum aperture of f/4 @55m, and f/5.6 @250mm, so you will not be able to go wider than f/4 (smaller f-numbers mean a larger aperture opening).

2. Focal length. The longer your focal length, the more background blur you'll get. In this case, that would mean using your lens zoomed all the way in at 250mm, vs. zoomed all the way out at 55mm. However, this will be offset a bit by the maximum aperture limit.

3. Subject-to-background distance. The larger the distance between your subject and the background you're trying to blur out, the more blur you'll get. If your subject is standing up against a wall, it's going to be hard to get the wall to blur. If your subject is 10' in front of the wall, it's a lot easier.

4. Camera-to-subject distance. The nearer the camera is to the subject, the more you can blur the background. If you're trying to shoot someone from 100 yards away, it's going to get really really tough to get any background blur at all.