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First Infrared Image
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It seems IR with digital is a little bit tricky lol. I bought the Cokin IR filter, but wish I had gotten the Hoya screw-in one instead. The amount of light leakage with the Cokin is unbelievable, and most of the shots I took were unusable.
I actually took this months ago, and havn’t used the filter since. I think I might order the Hoya next summer…..some IR shots I have seen are just amazing.
Anyway, I know it is far from perfect, but here it is………
Steve
It’s interesting to see this and read your comments about the filter. Is the camera using its low-light shooting ability to pick up an image? I remember reading that some point-and-shoot machines with the correct filter can allow you to see through people’s clothes – quite popular in Japan apparently, but they do love gadgets there!
What’s the strange artefact in the sky in your shot (right of centre at the top)? Is that where the filter was leaking?
PeteTheBloke wrote:
Is the camera using its low-light shooting ability to pick up an image?
I’m not exactly sure what you mean by that. I think you are referring to exposure length? The image was taken at 5pm on an August evening, and the exposure was 8 seconds. I think all digital cameras have some kind of filter to block IR radiation, which is why you need extremely long exposures. I hear that IR film is really the only way to capure a decent shot. Not sure about the mark at the top, could well be something to do with the filter.
SteveD wrote:
I’m not exactly sure what you mean by that. I think you are referring to exposure length?
I suppose I was wondering if the CCD is geared to pick up invisible light? I have a Sony point and click job and it’s got a candlelight setting that enables me to see the red light on the TV remote control even though my eyes cannot see it. I’ve never done the test with my DSLR (and it’s off being repaired at the mo).
PeteTheBloke wrote:
I suppose I was wondering if the CCD is geared to pick up invisible light?
The majority of digital sensors can detect more than the visible spectrum, but not the full IR section. You can usually detect what is known as ‘near-infrared,’ and this usually is enough to give the desired result, albeit with long exposures.
In regards to your Sony…..
http://bermangraphics.com/press/infrared.htm
Is the Sony DSC-F707 Cyber-shot the ultimate IR camera?
Imagine a 5 megapixel digital camera with a simple switch that moves the IR blocking ?hot glass? out of the optical path, a camera with an excellent electronic viewfinder, and even a pair of built in infrared emitters to illuminate your subject in total darkness. Sound like the ultimate IR camera? In low light conditions, the Sony DSC-F707 IR abilities are phenomenal. Unfortunately, Sony has intentionally limited its ability to work in normal daylight. Stung by sensationalist reports in the media about how it?s infrared capable video cameras could see through clothing, (some kinds of material, especially wet bathing suits, tend to be somewhat translucent to IR light), Sony has limited the Cyber-shot?s exposure range. When in ?NightShot? (IR) mode, the camera will not adjust it?s exposure to be shorter than 1/60 of a second at f2.0, thus greatly overexposing in daylight. Combining an 88a infrared filter with neutral density filters can compensate for this limitation, but it?s a shame that this artificial restraint exists at all. Overall, this camera is a joy to work with, opening up a whole world of nighttime infrared possibilities.Steve, I haven’t seen your photo as it’s blocked here in work, but you could try using Blu Tack around the edges, not very slick looking I know but at least it’s functional.
Shame about the light leakage on the filter you bought – love the feel of IR images – it’s something I’ve been meaning to try out for ages.
Aside from the IR Shield on DSLRs (I think it’s to protect the sensor from damage, although could be wrong), another common error with IR photography is that of assuming the autofocus will work. The IR focal distance is slightly different from regular photography, so keep a watch out for that. The image above seems well focused, however this could just be down to a narrow aperture?
As for the image, I think you’ve done a great job for your first attempt at IR. Works really well with the contrast of the grass and the building, with the path leading your eyes into the shot. Only very minor observation is that the horizon isn’t quite straight. Maybe a degree or so out – just a little niggle to straighten up.
Good luck solving the leakage issue – hopefully see some more shots soon!
Tim
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