Question about blur background

[Always]

Hello everyone... im currently using the rebel xt with kit lens..and i came across this picture and was wondering if anyone could show me what settings to use to blur the background like that? Thank you for any responses


http://img179.imageshack.us/img179/9906/m6qs.jpg

[stupot]

not possible with the kit lens, you're gonna need something longer probably:) (or faster... = expensive!)

to get the most blur from the kit lens, zoom in to 55mm, set aperture to f5.6 (put camera in Av mode) put the subject as close to the lens as possible (without going closer than the min. focusing distance) and have the background as far away as possible.

[lostdoggy]

Thats not completely correct.

For it to work there is a basic need to understand it is done. To blurr the BG you need to have the aperature wide open as much as possible. With kit lens that would be @ f/2.8 @ 17mm and the Subject is beyond the focusing range of that particular f/stop and focal length. Simply put make sure your subject is very close and the BG is very far away.

try this site for more info:
http://www.mapril.net/dof/dof.htm

BTW I haven't read it but just browse thru it!!!

[crn3371]

Where do I get that f2.8 kit lens!

[montreal]

Yes... the kit lens is actually 3.5-5.6 :)

[montreal]

This pic was taken with the kit lens. As stupot says, 55mm, f5.6 and a subject that's close to the camera is the way to go to get background blur with the kit lens.

[lostdoggy]

Sorry me bad, haven't pullout the kit lens in years!!! Don't worry 1 stop won't hurt much.

[Longwatcher]

You should be able to do something similar at up to F5.6, but I suspect that was done at F2.8 or F4 at most.

As mentioned just put the kit lens at 17 (or 18mm) and as wide open as possible (F2.8, F3.5 or F4 depending on which kit lens) then get the model as close as possible to the camera and have the background as far as possible, such as model on one side of pool with you and aim for back side of pool. That should blur out enough.

[mcminty]

You should be able to do something similar at up to F5.6, but I suspect that was done at F2.8 or F4 at most.

As mentioned just put the kit lens at 17 (or 18mm) and as wide open as possible (F2.8, F3.5 or F4 depending on which kit lens) then get the model as close as possible to the camera and have the background as far as possible, such as model on one side of pool with you and aim for back side of pool. That should blur out enough.
... I think you ment to zoom the kit lens to 55mm.


Andrew.

[montreal]

... I think you ment to zoom the kit lens to 55mm.

No... for a bee, you can zoom to 55mm (because the bee is so small), but to achieve the result the OP was talking about (a model) you need to zoom out to fit the model in the frame. Of course the blur isn't as... well, blurry... when you're zoomed out.

[Fade2]

Hello everyone... im currently using the rebel xt with kit lens..and i came across this picture and was wondering if anyone could show me what settings to use to blur the background like that? Thank you for any responses


http://img179.imageshack.us/img179/9906/m6qs.jpg

After further review..the picture looks like it was blurred with Photoshop.
Take a closer look.

[zoolanded]

http://myspace-918.vo.llnwd.net/01404/81/97/1404407918_l.jpg
This one was used with a Kit lense, its all about depth of field, isnt it also called bokeh? anyways i think having the back to blurry is ugly its to blown, and something like that is definately a photoshop.

[lostdoggy]

After further review..the picture looks like it was blurred with Photoshop.
Take a closer look.

I took a closer look and I would say its a tough call!!! Its possble to get that effect with a 100mm lens at a relatively wide open Av.

[lostdoggy]

Here is shot @ 42mm f/2.8:

http://i23.photobucket.com/albums/b381/lostdoggy/POTN%20uploads/CRW_4217PS.jpg

of cause the subject is not as interesting

[saravrose]

After further review..the picture looks like it was blurred with Photoshop.
Take a closer look.

I don't think I agree with you.. maybe the girl was processed a bit to seperate the bokeh from the subject but, that bokeh looks pretty good to me. It's actually not that creamy everything behind her still distinguishable... if i were doing it through PP I would have done a bit better... Not that you should use postprocessing to create DOF.. don't really believe in that one..

sari

[RgB]

Yes getting closer multiplies the DOF effect, it actually gets smaller. I think:)