a better diy infrared filter take stunning digit

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Get started on infrared photography with your own filter.

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http://www.instructables.com/id/A-better-diy-infrared-filter---Take-stunning-digit/Home Sign Up! Explore Community SubmitA better diy infrared filter - Take stunning digital IR pictures, and videofootage.by sam noyoun on June 2, 2007Table of Contentsintro: A better diy infrared filter - Take stunning digital IR pictures, and video footage.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Video. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2step 1: Building the filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2step 2: Pictures and settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4step 3: some IR effects.... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7step 4: IR videos. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Video. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Related Instructables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Advertisements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Customized Instructable T-shirts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Comments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9http://www.instructables.com/id/A-better-diy-infrared-filter---Take-stunning-digit/intro: A better diy infrared filter - Take stunning digital IR pictures, and video footage.This instructable improves on my previous post, Take Infrared Pictures With Your Digital CameraAfter a few months of experimenting with the filter, I have made a few design modifications and tweaked it, in order to obtain what are sometimes incredibly beautiful andeerie pictures.I will detail the building process of the filter case here; I will also show some examples of what can be achieved with a simple digital camera (a Canon A710IS in mycase), detail some of the more uncommon uses the filter can be put to, and finally I will look at using the filter for making simple IR videos.To whet your appetite, the movie underneath shows a little-known effect that can be achieved in video mode, with the infrared filter. For similar videos and tricks, you canalso check my website condition yellowHow to spot a guy in camo:VideoSHARE THIS VIDEOstep 1:Building the filterFirst of all, thanks to Laurici for pointing out floppy disk film also filters infrared light.The filter casing is made of the bottom of a plastic box of pills, through which I simply cut a round hole using a knife and file. I then covered it in black electrical tape, asthe white plastic was letting some light through.The filter itself is made of a piece of black unexposed processed film, and of a piece of floppy disk film, which I have found to be the combination that worked best for mydigital camera. It is well worth experimenting at this stage, as different cameras have different IR sensibilities, and two pieces of black processed film, or just one piece offloppy disk film might work better for you.As you can see from the pictures, it is hard to get a piece of film or floppy that will completely fit the casing. in order to hide the trimmed edges, so as not to let any light in,I cut a round piece of hard plastic with a square hole inside it, to fit the size of my camera's objective.Finally, I clamped the two pieces of film and the squared-holed round plastic piece inside the casing with a strip of rubber cut to size, from a rubber wristband.I also found that this piece of rubber wristband provided just enough grip on my camera's objective to hold the filter in place and prevent it from falling off when shootingdownwards.http://www.instructables.com/id/A-better-diy-infrared-filter---Take-stunning-digit/http://www.instructables.com/id/A-better-diy-infrared-filter---Take-stunning-digit/step 2:Pictures and settingsHere are some examples of infrared pictures taken with the filter. None of them were doctored or photoshopped.While not quite of a professional quality (neither is my camera!), these pictures show that a diy filter can make an excellent introduction to the world of IR photography,and that you can obtain extremely good results.Having a digital camera with full manual mode is particularly helpful, as it gives much more creative control over your pictures.Essentially, there are three variables you will need to play with in order to achieve good pictures:- ISO: ISO denotes the sensitivity of the image sensor to available light. Generally speaking, the lower the ISO, the better (sharper) results you'll get. However, setting thistoo low will increase your necessary exposure time, which can be a drawback. When the ISO is set to 400+, pictures tend to become grainy. I have found a goodcompromise was an ISO of 200 which, in bright sunshine, allowed me to take good pictures with an exposure of 0.5s- Exposure: exposure is measured in lux seconds. It denotes the amount of light the camera's image sensor is exposed to... Basically, there are many factors which willdictate your choice of exposure for IR pictures: is camera shake a factor? how strong is the filter? How much available light is there... etc. I tend to take several shots atdifferent exposures (gradually increasing) in order to be able to later choose the best picture. I have found it varies from 0.5s in bright sunshine to up to 10s on cloudydays.Obviously a tripod is essential for exposures of -say- over 1 sec., but if your camera has an image stabilizer (the Canon A710IS does), then you can get away with takinggood IR pictures without a tripod.- White balance: in order to avoid your pictures coming out red (and thus needing photoshopping) it is essential to set a custom white balance, if your camera allows youto do so. Some IR photographers recommend you do that by setting the white balance against a patch of grass, or a piece of blue sky, but I have personnaly obtainedbest results by simply setting it with a piece of white paper (prior to using the filter). As you can see from the photographs below, there remains some richness of color toIR pictures taken with such a custom white balance.http://www.instructables.com/id/A-better-diy-infrared-filter---Take-stunning-digit/http://www.instructables.com/id/A-better-diy-infrared-filter---Take-stunning-digit/http://www.instructables.com/id/A-better-diy-infrared-filter---Take-stunning-digit/step 3:some IR effects...Some interesting effects:If you've watched the video on the first page of this instructable, you will know that because foliage appears as white in IR photographs, pictures can reveal objects thatwould otherwise be very difficult to spot, such as camouflage fabrics and paints.This, until the advent of thermal imaging, was one of the military uses of IR photography.Infrared light also travels far better than visible light through haze, fog and dust particles. The military were again fast to see some applications for this phenomenon, suchas aerial recce photographs. This is also one of the reasons IR filters are used in astronomy and by firefighters, as gas, dust and smoke are transparent to IR light.From the pictures below, you can see than some objects and liquids are also transparent to IR light, such as sunglasses, coffee, or cola.Early Sony Nightshot camcorders, which do not have an IR blocker, were also made infamous for their ability, under particular circumstances, to see through lightclothing.Finally, skin also has some degree of transparency to infrared light, which gives IR portraits a white milky look, and sometimes reveal superficial blood vessels.http://www.instructables.com/id/A-better-diy-infrared-filter---Take-stunning-digit/step 4:IR videosWith a digital camera in movie mode, or with a camcorder, the diy infrared filter can also be used to record videos, giving them an eerie and mysterious atmosphere.However, due to the short exposure of video shots, it is hard to get satisfactory results with two pieces film. In the video on the first page of this instructable, as well as theone underneath, the footage was recorded through a single slide of photographic film, which does let in a fair amount of natural light, as well as IR light. The result is anhybrid, which has an interesting mood to it however.Videohttp://www.instructables.com/id/A-better-diy-infrared-filter---Take-stunning-digit/Related Instructablesinfrared digitalcamera - thereal way bytalbotron22IR digitalcamera modkeepsautofocus intactby uhf