CrossLighting

[b0ss]

hi there,

After seing this video YouTube - Strobist Technique: Cross-lighting with Wireless Strobes , I found the result quite promising, being able to black out the background. I have a SB600 and on camera flash(D90); could I still be able to get the desired effect, or does the lighting has to be as shown in the video?
Is there an actual technique to blackout the background like shown using a flash?
Last but not least, I have been wondering how the white balance works, when shooting in broad day light using a flash: why do we need to set the WB on Flashlight and the day light is not taken into account?

Thanks for your help,

B0ss.

[kencaleno]

Originally Posted by b0ss

hi there,

After seing this video YouTube - Strobist Technique: Cross-lighting with Wireless Strobes , I found the result quite promising, being able to black out the background. I have a SB600 and on camera flash(D90); could I still be able to get the desired effect, or does the lighting has to be as shown in the video?
Is there an actual technique to blackout the background like shown using a flash?
Last but not least, I have been wondering how the white balance works, when shooting in broad day light using a flash: why do we need to set the WB on Flashlight and the day light is not taken into account?

Thanks for your help,

B0ss.

Both light sources need to be off camera to work:

Ambient(daylight) is controlled by shutter speed-flash by aperture. Out doors you could use your sb 800 and the sun as the two light sources.Ken

[b0ss]

So is the back light(so the source light placed behind the subject) blacking out the background?
Since the Sunlight and flash, have different temperatures(kelvin wise), how come the sun renders as a strobe/flash? Is this because the Flash has a higher temperature than the daylight and therefore the camera renders the same as the flash light?(I have difficulties understanding how does the camera keep correct white balance while shooting with different light sources and types).

Nice sketches by the way

[krossk]

No - think of it as the fast shutter speed under exposes the entire shot but the flash throws extra light on the subject. So you end up with a properly exposed subject against an under-exposed background.

[b0ss]

So it would be possible to have the same effect with an on shoe flash only?

[krossk]

You still need to control the light from the flash. Straight on-shoe flash is going to allow the excess light that spills past the subject to illuminate the background in the frame. Having it off-camera pointing across the field of view allows the "excess" light to flow out of the scene and not illuminate anything in the frame but the subject.

[b0ss]

Uhmm, I get it now, thanks for your help mon