Orbs demystified...

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Orbs demystified...

Post by LivinginLuxor »

That strange phenomenom of orbs in digital photos, which some people consider to be spiritual phenomena has finally been accurately explained.

By taking stereoscopic pictures, if an orb was anything other than a dust particle, it would appear in both pictures - but it doesn't!

Here's the full article explaining the theory behind orbs..

http://www.parascience.org.uk/articles/orbkill.htm


I might agree with you, but then we'd both be wrong!
Stan

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Post by Bullet Magnet »

I noticed these things when I started taking pictures in Luxor. To me it was pretty obvious it was dust. No shortage of it around the temples etc...

Also I recall taking a picture of my garden and a strange mist appeared in the picture, of course the strange mist was infact the remnants of my cigarette smoke I had just exhaled prior to taking the shot. :lol:

I guess the digital camera's are much faster and sharper than the old celluloid technology.

The only annoying part of digital filming, is the vertical white line you get from a reflective surface. Even the BBC suffer from this anomaly with on board shots from race cars and the like.


Thanks to digital camera's, I can now pick up a decent Nikon 35mm SLR camera for as little as 50 quid. A tenth of the original price....

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Post by drwho »

So don't get me wrong, your saying that when I was building my kitchen, that these ARE NOT visitors from Thoth Hill in the guise of SB's (superior beings) I think you jest...8)
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note the scarab as well..

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Post by Grandad »

You need to do something urgently about that scarab Doctor or you will be over-run with the things. :) Try mouse killer! ;)

Stan, the piece infers that this is a new phenomena only occuring in digital photography....but I am sure I remember the same thing with roll film?????
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Post by crazycat »

I've had orbs with roll film, I put some pics on here some time back
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Post by Grandad »

Yep! I remember that CC when we were discussing the phenomena....

I am sure I could dig out some old examples. In my opinion, if they are caused by flash reflecting back into the lens from dust particles (and I can accept that as an explanation) why is it suggested that it only happens with digital?

Surely roll film is infinitely more sensitive than a digital sensor.
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Post by LivinginLuxor »

Possibly - but remember that film exposure is a chemical reaction to light, as opposed to an electronic reaction. The emulsion in a film is basically a paste, that is smeared over the celluloid, and thorough mixing before spreading ensures that the granules of silver nitrate (or whatever) is evenly mixed. In a digital camera, there are individual cells spread on a regular grid, which is not the case with film - the grains are randomly mixed. So, although orbs might well have appeared with film, they are probably easier to obtain in the regular structure of the digital processor.
I might agree with you, but then we'd both be wrong!
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Post by Bullet Magnet »

Like stan just said and beat me to the post...


The electronics work faster than the shutter of a camera Grandad.

An old film type camera had an .125 second exposure time on the flash, typically.
a Digital camera needs much less exposure time with a flash.

I think DrWho needs a couple of exorcists to visit. cant move for them orbs. That scarab looks like a vicious bugger too ;)

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Post by Bullet Magnet »

Now thats what I call Orbs.. 8)

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Post by Grandad »

But 'Z', the exposure with electronic flash is governed by the flash strength/duration and the iris f aperture. The limiting factor for the shutter speed is that the FP shutter must be fully open when the flash fires and that applies to roll film SLR's just as much as to DSLR's. Otherwise part of the frame would be unexposed.
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Post by LivinginLuxor »

But the flash on a digital camera is calibrated to the sensor so comparisons with a mechanical camera are probably not valid.
I might agree with you, but then we'd both be wrong!
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Post by Grandad »

I have never owned a DSLR and assumed that they also had FP shutters like SLR's.....wrong?

PS. Stan why is your clock setting showing 6.23 pm Monday???

Edit: Only just noticed my post time is also way out.???

Edit: Edit: What standard time are we set on ??????
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Post by LivinginLuxor »

My clock is right - but I'll check to see if it is different here - I set it to GMT+3 on the forum.
I might agree with you, but then we'd both be wrong!
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Post by BBLUX »

One thought. Digital camera's tend to be the all in one compact variety with the flash assembly very close to the plane of the lens. This is more likely to cause bounce back along the return path from the dust particles. The much higher mounted external flash gun on the film SLR...which we often angled to bounce the flash, is less likely to cause reflection back along the plane of the lens.
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Post by Grandad »

Very true BB, that makes sense, but surely that would apply equally to roll film as to digital.....I am still not convinced that they only show on digital images...
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Post by BBLUX »

Agreed, but a compact film camera had the same layout as the modern compact digital so maybe that is where the film era orb shots come from?
Also, the film processing labs were inclined to"edit" bad pictures and not print them so who knows?
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Post by Grandad »

Are we not going off at all hypothetical tangents here???

Roll film certainly worked with X synch faster than 1/8th second as Z suggests. At least 1/100th was normal. Most digital cameras use X synch of 1/150th or 1/200th so not much difference there.

And I don't think labs did too much sorting of poor shots BB, they certainly didn't with me, I got everything back even the rubbish and paid for it. :)

And a modern digital sensor behaves in a very similar manner to roll film, i.e. the amount and colour of the light that falls on each cell or grain when the shutter opens.

One aspect of digital that I can't yet get my head round is how the sensor can be set to different ISO sensitivities.... Now that is something I really would appreciate an informed explanation for. :)
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Post by Bullet Magnet »

I too need to fully understand how the digital camera flash works, but Stan is going along the right lines.
The elctronic circuitry can guage the light entring the camera, and close it off when required. there is a way of fiddling this to create different effects, by tampering with the light sensor on front of the camera.. ie, partially blanking it off, or using a thin cloth to "trick" the camera into how much light it has received.

I'll take a look when I get home, as I am sure I have an explanation somewhere on how to do this and how it works on my PC...

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Post by Alistair1967 »

Orbs?! Lens flare, surely...

I have captured hundreds of SLR images, both digital and film , but never had an 'orb' yet. I have had some pretty poor pictures, but I guess that's down to me. :((

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Post by Kevininabydos »

If the orbs are light reflection from dust particles, how do you explain the faces in them when you zoom in on them on the computer? Sometimes there are 2 or 3 different faces in each orb. I have some photos of friends in Merenptah's passage way in Abydos and there are dozens of them, all with faces in every shot. They vary in size some tiny some huge! :?
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