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Infrared Photography Competition



 
 
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  #11  
Old December 6th 06, 12:21 AM posted to alt.photography,aus.photo,rec.photo.digital,rec.photo.digital.slr-systems,rec.photo.digital.zlr
Unclaimed Mysteries
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Posts: 158
Default Infrared Photography Competition

Pierre J. Proudhon wrote:
In article ,
"Bill Again" wrote:

"Derek Fountain" wrote in message
reenews.net...
DIMi is running an infrared photography competition sponsored by
MaxMax.com with monthly IR filter prizes and a grand
prize of a digital camera conversion to IR mode, worth US$450.
Erm, presumably you need an IR camera in order to take part in the
competition, and so the grand prize would, kind of by definition, be
worthless to its winner?

Not necessarily so. Many digital cameras can take IR pictures using the
relevant filters.


That is not IR Photography. There is a big difference between using a
filter and using the film.


Uh, what? If you mean simulating IR in software "filters," that's one
thing. Otherwise, actual IR photons don't care what kind of sensor they
hit, whether it's an electronic array or film.

--
It Came From Corry Lee Smith's Unclaimed Mysteries.
http://www.unclaimedmysteries.net

"Being an Auburn fan explains a lot about what is wrong with you,
Unclaimed ... You didn't chose to address any of my post except this
last little piece where I ridiculing you for being an idiot." - "Altie"
on rec.sport.football.college, 2006
  #12  
Old December 6th 06, 02:00 AM posted to alt.photography,aus.photo,rec.photo.digital,rec.photo.digital.slr-systems,rec.photo.digital.zlr
Pierre J. Proudhon
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Posts: 9
Default Infrared Photography Competition

In article . net,
Unclaimed Mysteries
the_letter_k_and_the_numeral_4_doh@unclaimedmyste ries.net wrote:

Pierre J. Proudhon wrote:
In article ,
"Bill Again" wrote:

"Derek Fountain" wrote in message
reenews.net...
DIMi is running an infrared photography competition sponsored by
MaxMax.com with monthly IR filter prizes and a grand
prize of a digital camera conversion to IR mode, worth US$450.
Erm, presumably you need an IR camera in order to take part in the
competition, and so the grand prize would, kind of by definition, be
worthless to its winner?
Not necessarily so. Many digital cameras can take IR pictures using the
relevant filters.


That is not IR Photography. There is a big difference between using a
filter and using the film.


Uh, what? If you mean simulating IR in software "filters," that's one
thing. Otherwise, actual IR photons don't care what kind of sensor they
hit, whether it's an electronic array or film.


The results are different if you spent any time using IR film. All
Infrared film is sensitive to both some Infrared and visible light.

Digital IR photography typically relies on reflected NIR from sources
like the sun and incandescent lamps. Digital camera sensors based on
silicon are not sensitive to the far (thermal) IR wavelengths (typically
3.0µ and longer) emitted by objects at room to body temperatures. Heat
leaks from houses aren't visible in the NIR, and people, animals and
other objects at room to body temperatures don't glow in the NIR any
more than they do in visible light. To photograph them in the dark, you
have to provide proper NIR illumination using a suitably equipped camera
like the Sony DSC-F7x7 or an external NIR-only flash with no filter.

I can go on but you bore me.
  #13  
Old December 6th 06, 03:33 AM posted to alt.photography,aus.photo,rec.photo.digital,rec.photo.digital.slr-systems,rec.photo.digital.zlr
Wayne J. Cosshall
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Posts: 826
Default Infrared Photography Competition

Pierre J. Proudhon wrote:

The results are different if you spent any time using IR film. All
Infrared film is sensitive to both some Infrared and visible light.

Digital IR photography typically relies on reflected NIR from sources
like the sun and incandescent lamps. Digital camera sensors based on
silicon are not sensitive to the far (thermal) IR wavelengths (typically
3.0µ and longer) emitted by objects at room to body temperatures. Heat
leaks from houses aren't visible in the NIR, and people, animals and
other objects at room to body temperatures don't glow in the NIR any
more than they do in visible light. To photograph them in the dark, you
have to provide proper NIR illumination using a suitably equipped camera
like the Sony DSC-F7x7 or an external NIR-only flash with no filter.

I can go on but you bore me.


The fact that the results are different does not make one more valid
than the other. Digital sensors don't have the same halation of many IR
films, so the results look a bit different, that's all.

What you then say about digital IR also applies to film IR, since both
rely on reflected NIR. IR film also does not have sensitivity beyond the
NIR, typically cutting off before 1000nm, so I don't get the point you
are trying to make.

Cheers,

Wayne

--
Wayne J. Cosshall
Publisher, The Digital ImageMaker, http://www.dimagemaker.com/
Blog http://www.digitalimagemakerworld.com/
  #14  
Old December 6th 06, 03:36 AM posted to alt.photography,aus.photo,rec.photo.digital,rec.photo.digital.slr-systems,rec.photo.digital.zlr
Wayne J. Cosshall
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Posts: 826
Default Infrared Photography Competition

UC wrote:

****ing idiots. Why give a camera away as a prize, when you need a
camera to win?

Give away an ipod or something else, dumbass.


I'd normally ignore such a post but I must correct one thing: the grand
prize is not a camera, but a camera conversion of a camera that the
winner must provide. The monthly prizes are also filters that people
would not commonly have and thus offer something interesting.

Many people have several cameras. In my case I chose to have one
converted to IR only for much shorter exposures. Judging from the
entries that are also starting to roll in, others obviously also think
it is worthwhile.

Cheers,

Wayne

--
Wayne J. Cosshall
Publisher, The Digital ImageMaker, http://www.dimagemaker.com/
Blog http://www.digitalimagemakerworld.com/
  #15  
Old December 6th 06, 04:03 AM posted to alt.photography,aus.photo,rec.photo.digital,rec.photo.digital.slr-systems,rec.photo.digital.zlr
Pierre J. Proudhon
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Posts: 9
Default Infrared Photography Competition

In article ,
"Wayne J. Cosshall" wrote:

The fact that the results are different does not make one more valid
than the other.


No. But they are different. That was my point. Yawn.
  #16  
Old December 6th 06, 04:42 AM posted to alt.photography,aus.photo,rec.photo.digital,rec.photo.digital.slr-systems,rec.photo.digital.zlr
Frank ess
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Posts: 1,232
Default Infrared Photography Competition

Pierre J. Proudhon wrote:
In article ,
"Wayne J. Cosshall" wrote:

The fact that the results are different does not make one more
valid
than the other.


No. But they are different. That was my point. Yawn.


What it means, this "Yawn"?

--
Frank ess

  #17  
Old December 6th 06, 05:10 AM posted to alt.photography,aus.photo,rec.photo.digital,rec.photo.digital.slr-systems,rec.photo.digital.zlr
ASAAR
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Posts: 6,057
Default Infrared Photography Competition

On Tue, 05 Dec 2006 13:59:03 +0100, Gisle Hannemyr wrote:

With a DSLR????


Of course not - the way Bill Again describes the test only works
if the camera has an EVF.

But you can do the same test with a DSLR by taking a photograph
of a tv-remote while somebody presses a button on it that makes
it emit IR. When you review the image on the review screen,
you'll see the IR glow described.


That's a neat and useful trick that works with my Sony IR remote.
But an EVF isn't required, since the blast of IR shows up nicely on
the LCD display of Canon's A620 which has an optical viewfinder.
Also, there may be several DSLRs that can also detect IR without
having to take a picture. These are the ones that offer live,
real-time viewing on their LCD displays, and are manufactured by
Olympus, Panasonic and Leica.

  #18  
Old December 6th 06, 08:29 AM posted to alt.photography,aus.photo,rec.photo.digital,rec.photo.digital.slr-systems,rec.photo.digital.zlr
Unclaimed Mysteries
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Posts: 158
Default Infrared Photography Competition

Pierre J. Proudhon was strip-searched in Waverly, AL for writing in part:

The results are different if you spent any time using IR film. All
Infrared film is sensitive to both some Infrared and visible light.


Digital IR photography typically relies on reflected NIR from sources
like the sun and incandescent lamps. Digital camera sensors based on
silicon are not sensitive to the far (thermal) IR wavelengths (typically
3.0µ and longer) emitted by objects at room to body temperatures.


Many of us are already well aware that:

1) a silicon detector needs refrigeration to effectively image IR beyond
near-IR.

2) near-IR photography relies heavily upon primary illumination from a
strong source such as the Sun.

3) an 89B-ish filter with any digital camera, converted or not, is
unlikely to be used in thermography.

....

I can go on but you bore me.


MISSION ACCOMPLISHED.

--
It Came From Corry Lee Smith's Unclaimed Mysteries.
http://www.unclaimedmysteries.net
  #19  
Old December 6th 06, 09:35 AM posted to alt.photography,aus.photo,rec.photo.digital,rec.photo.digital.slr-systems,rec.photo.digital.zlr
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Posts: n/a
Default Infrared Photography Competition

In article PierreJProudhon-26BD62.16453305122006@news-fe-
01.texas.rr.com, says...
In article ,
"Bill Again" wrote:


"Derek Fountain" wrote in message
reenews.net...
DIMi is running an infrared photography competition sponsored by
MaxMax.com with monthly IR filter prizes and a grand
prize of a digital camera conversion to IR mode, worth US$450.

Erm, presumably you need an IR camera in order to take part in the
competition, and so the grand prize would, kind of by definition, be
worthless to its winner?


Not necessarily so. Many digital cameras can take IR pictures using the
relevant filters.


That is not IR Photography. There is a big difference between using a
filter and using the film.


True, especially if you're thinking of Kodak IR film. With digital, if
you want halation and massive grain, you need to add it in processing.

Not a slam of HIE, I actually do like its halation and grain. But if
you have a good digital IR image, you really can add the halation and
grain afterwards.

As far as sensitivity to IR, digital cameras that still have their
internal IR-blocking filters are slower than Konica 750 IR film with an
87-series filter. But if you have a camera without the internal IR
blocking filter, digital can be as fast as HIE, and most digital sensors
are sensitive much deeper into the IR spectrum than film IR was.

--
is Joshua Putnam
http://www.phred.org/~josh/
Updated Infrared Photography Gallery:
http://www.phred.org/~josh/photo/ir.html
  #20  
Old December 6th 06, 09:01 PM posted to alt.photography,aus.photo,rec.photo.digital,rec.photo.digital.slr-systems,rec.photo.digital.zlr
UC
external usenet poster
 
Posts: 195
Default Infrared Photography Competition


Wayne J. Cosshall wrote:
UC wrote:

****ing idiots. Why give a camera away as a prize, when you need a
camera to win?

Give away an ipod or something else, dumbass.


I'd normally ignore such a post but I must correct one thing: the grand
prize is not a camera, but a camera conversion of a camera that the
winner must provide. The monthly prizes are also filters that people
would not commonly have and thus offer something interesting.

Many people have several cameras. In my case I chose to have one
converted to IR only for much shorter exposures. Judging from the
entries that are also starting to roll in, others obviously also think
it is worthwhile.

Cheers,


You're a moron.

Wayne

--
Wayne J. Cosshall
Publisher, The Digital ImageMaker, http://www.dimagemaker.com/
Blog http://www.digitalimagemakerworld.com/


 




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