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What makes this happen (Digital Camera Question)
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Actually.....
Most digital cameras do pick up infrared, it's just processed and/or filtered out of the pic.
My brother can see the infrared from a remote control on his LCD screen when he points it at the lens and pushes buttons. 😀
But I agree, that isn't going on here.
It looks like shake, plain and simple.
It is odd that the background is in sharper focus than the candycanes. Maybe the camera does have an overlap mode? It might help to know what camera you have.
It's an artistic (and/or papparazzi) thing. All your high end photography joints carry infrared sensitive 35mm film. But you're right, this is more of a professional feature that would appear on DSLR's first and would probably be a very stupid thing to give to the general public.
Sony's new F828 8MP camera has a night shoot mode.
It has an infrared LED on the front of the camera that, when in this mode, bathes the scene in infrared.. and snaps a pic, rendering it in a green tint.
It's pretty cool really.
Even if the camera is in p or auto mode, it will pick the slowest shutter speed possible to properly expose the picture.
Anything less than 1/30 sec (1/20s for some steady people) will cause blur, or in this case multiple exposure of the cane.
Does the flash fire ? if it does must be the slow sync flash but you still have to stay still after the flash.
Anything less than 1/30 sec (1/20s for some steady people) will cause blur, or in this case multiple exposure of the cane.
Does the flash fire ? if it does must be the slow sync flash but you still have to stay still after the flash.
johnjbruin
Diamond Member
simple - its a longer exposure time. and your camera wasnt stable during that whole time the shutter was open.
ahahahhaa
yea, in photography, "shaking" doesn't mean shaking the way it's used in the context of an etch-a-sketch. it just means the camera moved a decent amount while the shutter was still open. during the day, auto cameras have short shutter speeds because it's nice and bright, so shaking is not really an issue as long as you're making an effort to stay still. but at night, the shutter speed is pretty long and the slightest movement screw it up. that's why people use tripods.
There was definitely some movement, even it very very little. That, coupled with a relatively slow shutter speed would cause that. The lights are much brighter than the arms of the person in the shot, so the lights are much easier to expose. If your cam has manual shutter speed/aperature settings, you might wanna try tweaking with those instead of the built-in shooting modes.
Wallydraigle
Banned
Actually it's the other way around. Most DSLRs have a IR filter in front of the sensor because sensitivity to IR can cause aberations and other undesirable characteristics. Many pocket digicams are very sensitive to IR because to save money the IR filter is left off, and IR photography is picking up as a hobby because of this.
That has nothing to do with this photo however. The exif data is still embedded in your photo. The shutter was left open for 1 second. It's no mystery where all the funny artifacts are coming from. You could have snapped the photo and a took the camera from your face but light was still being recorded a full second later.
it was a low light situation according to your camera, despite the lit canes. to respond to the low light, the automation of your camera made the shutter speed low, that is, the exposure was over a period of time, say a second or even half a second. if you look at the top middle of your picture, you can see swirl marks, those mark the precise movements made with respect to the optical system. just a note, while this is a bad thing, precise exposure control through movements create wonderful fireworks pictures.
As has been said earlier, the blurring of the canes, is due to shaking of the camera while the shutter is open for a long period - this shake is not necessarily deliberate.
The person in the background looks sharp because they were illuminated by the camera's flash - the flash typically lasts an extremely short period of time (usually less than 1/10,000 second) - as a result any movement appears to be frozen.
Because ambient light levels were very low at the time of the picture, for the remainder of the exposure after the flash the person is essentially in deep shadow and won't show up, but the illuminated canes do because they are bright. Hence, you have a perfectly sharp background with blurred foreground.
See here for a less subtle example of this effect.
The person in the background looks sharp because they were illuminated by the camera's flash - the flash typically lasts an extremely short period of time (usually less than 1/10,000 second) - as a result any movement appears to be frozen.
Because ambient light levels were very low at the time of the picture, for the remainder of the exposure after the flash the person is essentially in deep shadow and won't show up, but the illuminated canes do because they are bright. Hence, you have a perfectly sharp background with blurred foreground.
See here for a less subtle example of this effect.
Wallydraigle
Banned
Your monitor shows a new "frame" from 60 to 85 times a second, depending what you have your refresh rate set at. The shutter was left open for a second or so (if you knew the refresh rate of the monitor you could actualy count frames and know exactly how long the shutter was left open, there's no EXIF in this one) and each frame has been captured in the shot.
If you use a very fast shutter you don't even see the frame itself, just the scanline.
Hmm, yeah.. I know..
I guess I'm just failing to understand why the image is like horizonal across the frame like that...
So basically, the flash fired.. caught the background, and then the camera was moved.. causing the image from the monitor to trail, I guess?
it just looks so bizzare.. lol
Wallydraigle
Banned
Yeah.
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