Today my long end was started which span over 3 days so i woke up late. The next thing i was doing after wake was checking my mobile screen to see any notification of Facebook (lets be honest ... who doesn't do this :) ) .... after cruising quickly, i found one image from one of my friend from Facebook where he used 2 flash light and struggled to get Black Background (BG) .... So i decided to help him which i did by suggesting quick tips which you will read shortly ....
Question what i am asking you all ..... why you need black BG? what so special about it ? why can't we deal with white BG? Why we want Black only
Answer is simple .... black (or under expose image) always bring Drama and feeling into the image condition provided if subject/model is properly expose using the flash or studio strobe. We technically call them "LOW-KEY IMAGE". Of course you can bring the charm of fantasy by using White BG (technically call HI-KEY IMAGE) but you really need to play with light & "Colours" to stand out your image in HI-KEY photography unlike LOW-KEY where single ray of light can be difference maker if properly placed :) .... So lets dive in how to get LOW-KEY image or image with Black BG.
3- Use high speed sync flash which works at 1/8000 of a shutter speed. This will kill any ambient light coming from the backside of the subject trying to get enter into the lens. When u go higher shutter speed, it will kill ambient light but you may need to increase your flash power a bit. Or open up your aperture (say f/2.8 or f/1.4) or increase ISO a bit (say upto ISO 400) ... You also may requires external battery pack for flash to get more juice out of your flash for extra push of light at higher sync speed. If some of you read my last blog about flash sync speed ... i did mentioned about flash power decrease at the higher shutter speed. The reason is that, at higher shutter speed, you shutter opens for very little time so the only light sensor able to get is the one which is near. In this our case it is flash light which reflect from the subject and then goes into the camera .... so when you have less time to absorb the light, you may need to push more light (means more flash power) to properly lit the subject.
Remember .... Aperture controls the Flash exposure ..... Shutter Speed controls the ambient exposure .... :)
Babar-Photography
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Question what i am asking you all ..... why you need black BG? what so special about it ? why can't we deal with white BG? Why we want Black only
Answer is simple .... black (or under expose image) always bring Drama and feeling into the image condition provided if subject/model is properly expose using the flash or studio strobe. We technically call them "LOW-KEY IMAGE". Of course you can bring the charm of fantasy by using White BG (technically call HI-KEY IMAGE) but you really need to play with light & "Colours" to stand out your image in HI-KEY photography unlike LOW-KEY where single ray of light can be difference maker if properly placed :) .... So lets dive in how to get LOW-KEY image or image with Black BG.
About getting black BG .... Its very simple but most
photographer failed to get it initially
There are the following ways to get the black BG,
1- Use black sheet as a BG .... To do so,
use any thing who's surface is black and less shinny ... Black card board.
.. Black velvet piece of cloth which "absorb" the light .... Not
reflect it. And this goes to any black material which absorb the light. So try
to use Black material to get Black BG.
2- Try to use back ground with more distance from the
subject/model. Why is that??? .... Answer is simple .... The more the distance
you have behind the subject ... The quicker light is going to fall off/fade
behind the subject and you will see less amount of background expose. The
formula is simple. Double the distance of the subject with the BG ... Four
times light is going to be fade/fall off. Thats call inverse square law.
Check below table for further detail illustration
3- Use high speed sync flash which works at 1/8000 of a shutter speed. This will kill any ambient light coming from the backside of the subject trying to get enter into the lens. When u go higher shutter speed, it will kill ambient light but you may need to increase your flash power a bit. Or open up your aperture (say f/2.8 or f/1.4) or increase ISO a bit (say upto ISO 400) ... You also may requires external battery pack for flash to get more juice out of your flash for extra push of light at higher sync speed. If some of you read my last blog about flash sync speed ... i did mentioned about flash power decrease at the higher shutter speed. The reason is that, at higher shutter speed, you shutter opens for very little time so the only light sensor able to get is the one which is near. In this our case it is flash light which reflect from the subject and then goes into the camera .... so when you have less time to absorb the light, you may need to push more light (means more flash power) to properly lit the subject.
Remember .... Aperture controls the Flash exposure ..... Shutter Speed controls the ambient exposure .... :)
4- Use light modifiers to restrict the light in a
specified direction and don't get spill. Use softbox instead of umbrella.
Umbrella spills the light all over .... Softbox always confine the light in a
direction where you put in.
Check the following link and see how far the light spills ...
Light Spilling Image
Also I would like you all to see below link as well which is a practical implementation of the Point 2, 3 & 4 above.
Hi Speed Sync Image
For any question, you can email me at "Babar.photography@gmail.com".
Thanks,
Check the following link and see how far the light spills ...
Light Spilling Image
Also I would like you all to see below link as well which is a practical implementation of the Point 2, 3 & 4 above.
Hi Speed Sync Image
For any question, you can email me at "Babar.photography@gmail.com".
Thanks,
Facebook , Twitter , Flickr , 500px , YouPic
BBM Pin: 75DEED40
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