Nidelva river through Trondheim Norway

Nidelva river through Trondheim Norway
by Saaru Lindestokke                

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22
votes
2answers
2k views

Why is infrared light's focus point different from that of visible light?

When reading about infrared photography, it's often mentioned that IR's focus point is slightly different from visible light. Why is the focus point of infrared light point different from the focus ...
21
votes
4answers
801 views

Is it possible to do infrared photography with digital cameras?

I remember taking infrared pictures with a simple filter and black and white film. How can I do something like this with digital cameras? Or is this even possible?
18
votes
5answers
3k views

Do the infrared photographs really contain infrared colors?

In school, we all learned that from white light we can only perceive the visible spectrum but we can't see UV or the IR portions. If this is the case, then how come we can do infrared photography?. ...
17
votes
4answers
2k views

Hour long exposure of the sun

I'm attempting to do a shot without causing damage to my camera...A hour long exposure of a sunset. I've have used two pieces of welder's glass and got this shot. It caused a purple haze over a good ...
12
votes
5answers
3k views

Why don't most cameras use infrared for focusing?

All auto focus assist lights are either red or white. Why do DSLRs not use infrared instead? It seems it would be beneficial to a photographer to not blind their subject before taking a picture. ...
10
votes
2answers
3k views

Are infrared DSLR conversion companies safe? What about DIY infrared conversion?

I'm investigating the possibility of converting a DSLR (Canon T2i) to a infrared-only body. I've seen several websites that offer this service, but man, considering they are tearing your camera apart ...
10
votes
3answers
2k views

What type of effect is caused by different cutoff lengths for IR filters?

I'm looking at getting into IR photography, and am trying to decide what cutoff frequency filter to buy. Has anyone done a comparison of the same scenes using different filters?
10
votes
3answers
1k views

What are the benefits of infrared conversion?

I just picked up a Hoya R72 infrared filter, and I'm having a lot of fun experimenting with it. I'm in love with the false color style that can be added. So now I'm contemplating converting my DSLR ...
9
votes
4answers
2k views

Where is the color mosaic filter on a DSLR sensor?

I have been looking at this tutorial from Astostuff on taking off the hot mirror on a D70, but cannot figure out from the page where the color mosaic filter is located. Is it possible to remove the ...
7
votes
3answers
2k views

What is the best choice of filter for infrared photography?

If I choose to remove the hot mirror off the sensor of my D70, should I absolutely drop in an IR filter in it's place? I understand that dropping an IR filter shall put an end to all visible ...
7
votes
3answers
6k views

Does the Canon 60Da offer significant advantage over 60D with infrared filter for astrophotography?

I am looking to buy a new camera to upgrade from my 1000D. I found the 60D to meet most of my needs but came across the 60Da variant when trying to make a decision. The price difference is ...
7
votes
4answers
555 views

What causes the spots in my IR photos?

Below are images I've shot recently while experiminting with IR photography. The first is an IR image with +2 stops of exposure and a custom white balance based on the bright part of the tag on the ...
7
votes
1answer
3k views

How to use IR index on Canon EF 24-105mm F/4 L USM

I know that the little red numbers under the distance scale are Infrared Index. According to the lens's manual, you should use these numbers when you do infrared photography. However I don't ...
6
votes
5answers
645 views

What companies offer an IR camera filter?

I'm planning on converting a Nikon D50 to dedicated infrared, replacing the internal IR cut filter with one that will block visible light, and pass infrared. Google has turned up a couple sites, and ...
6
votes
2answers
361 views

Can you temporarily make an infrared digital camera “normal” again?

I have this great digital Sony NEX camera that was converted to shoot infrared photos. Sometimes I wonder if I could revert it to taking "normal" pictures with the use of a filter. I just started ...
5
votes
5answers
8k views

What should I look for in an infrared filter?

I'm looking to get myself an infrared filter to put in front of my lens. The cheaper ones all have nm counts (like 720nm, 950nm, 1000nm, and the way I understand this, the thicker, the better), but ...
5
votes
2answers
2k views

Infrared Photography - How to set White Balance?

When I started out photographing in infrared I wasn't setting a specific White Balance (I let the camera set on automatic). Then I started learning more about how people take infrared shots, and that ...
5
votes
1answer
415 views

Converting cameras for infrared use: When does the filter have to be replaced, and when is simply removing it ok?

When converting a digital camera for infrared use, the general approach is to remove any filters that limit its sensitivity to the visible range of light wavelengths. Some conversions replace the ...
4
votes
1answer
840 views

How do I know if my Canon T2i can support Infra Red photography?

I have a canon T2i and wondering if I can take some IR photos.
4
votes
4answers
228 views

Map R+G+B+infrared to R+G+B?

A photograph that includes color beyond the usual visible spectrum can be constructed by "overlaying" the image from a conventional camera with that from an infrared (or ultraviolet, or x-ray) one. ...
4
votes
1answer
818 views

How does the sensitivity of camera sensor behaves with the infrared filters?

I am puzzled about the behavior of camera sensor to the infrared spectrum. I have heard that the you must remove the internal infrared filter to capture infrared pictures. So, I removed it and used ...
3
votes
2answers
388 views

Bright image with infrared D3s and cap on (image included)

I have a D3s with no infrared filter (it has been removed). When I take dark images in high ISO with body cap on and covered in a wrap (so no light gets in), and no lens mounted, the images are not ...
3
votes
3answers
2k views

Is there a webcam that can focus to infinity, for time-lapse landscapes?

Does anyone here know of a webcam (at least 720p) that has the ability to focus to infinity? At least one webcam I know of (Logitech C910) doesn't allow that. I would like to use it for time lapse ...
3
votes
2answers
310 views

Restore colors from an infrared frame in Gimp

I have some frames of a security IR camera. The images are black and white. Is there any way to represent these images with colors. I use GIMP in Ubuntu operating system. Thank you!
3
votes
1answer
104 views

How do you focus a shot with an IR/UV passfilter?

I'm researching the world of photography outside of the visible spectrum and I'm really curious to get my hands on some filters, the Baader-U for example, to try shooting in these spectra. However, I ...
2
votes
2answers
1k views

Do I need a filter to use my Canon EOS 60Da for daylight photography?

Which filter do I need for the 60Da to use it in normal daytime use? Apparently I need a IR filter. Could someone please explain exactly which one I need and perhaps a link to a place I can buy one? ...
2
votes
3answers
2k views

What's the best way to shoot infra red?

I am new to the photography world and own a Canon 600D, I quite like some of the infra-red shots I've looked at. Is there a special lens required or does the camera need to be modified by other means ...
2
votes
1answer
36 views

How to use Infrared Film?

So I picked up a roll of Ilford SFX which is an IR film and I want to experiment with it. I've seen pictures taken with this film before; however, if I'm out in the field how will I know what the ...
2
votes
3answers
1k views

Would this IR-transparent plastic be useful for blocking unwanted control flash?

Pentax's wireless P-TTL system is optical, and requires a control flash. I'm using the built-in flash on my camera, but one can also use a hotshoe-mounted flash with the right feature set. If you have ...
1
vote
2answers
175 views

Sum of pixel values more than incident photons

I'm getting efficiency more than 100% for my camera in ISOs higher than 6400. Under what circumstances does one get more pixel values than the number of incident photons (photon detection efficiency ...
1
vote
3answers
633 views

Is it possible to map temperature values to RGB values in a near-infrared image?

If I would modify a DSLR (the Canon 350D for example) to capture infrared light, would I be able to tell the temperature of an object by reading out RGB values of an image? I assume a calibration ...
1
vote
2answers
266 views

How can I photograph only light from my IR source even in the presence of other light?

The setup I hope to achieve would be some filter/illumination system that will allow me to pick up infrared light from some illumination source (IR LED ring or similar) and only light from that ...
1
vote
2answers
183 views

Are these images from infrared film?

Recently have been eager to try my hand at infrared film photography. I've only done black and white film and color film so far, and have had experience in altering my negatives in post for ...
1
vote
2answers
281 views

Where or how to get exposed, developed colour film to use as a filter for infrared photography?

I was told that exposed developed colour film can be used to block visible light for infra-red photography. Where can I get some of this, or can I do it myself? I have a roll of 400 ASP colour film ...
1
vote
2answers
1k views

How to make Canon 500D as IR camera?

I want to make my Canon 500D as IR camera as I am getting a new camera. Can it be done DIY? or where can i get it done? and how much I should expect to pay ? I live in Durham, England. Or I ...
1
vote
5answers
227 views

Lens or Filter to Blur Thermal Camera Images

I know this question sounds weird, but I am looking for some kind of lens or filter to blur the images taken by a thermal camera. I don't need to blur a specific part of an image, just a blur ...
1
vote
2answers
91 views

Shifting the range of an IR camera?

I have a FLIR One IR camera. Works fantastic, but it does top out at 100ºC. Are there filters available that filter a set amount of IR energy to effectively shift the range of sensitivity? I.e. ...
1
vote
0answers
26 views

Looking for a long wavelength infrared still camera [closed]

I am trying to find a digital infrared camera that takes large still photos in long-wavelength infrared from 8nm-14nm. Not really interested in a video camera. Also not interested in near-infrared or ...
0
votes
4answers
129 views

How to take a picture of a point light source?

I work in a scientific laboratory and I need to take a picture of a sample that emits low intensity visible light (blue) when an infrared laser (980 nm) is pointed to it. I am using a filter with an ...
0
votes
3answers
60 views

What ISO setting to use with R72 Filter?

I am experimenting with shooting on infrared film for the first time. I have IR B&W Rollei 400 ISO film, Canon AE-1 camera, 28 mm wide lens, Hoya R72 filter. Would I set my camera to 400 ISO or ...
0
votes
3answers
5k views

Why isn't my Canon RC-6 remote control working with my Canon 550D?

I recently bought a Canon RC-6 and got dejected as nothing happened after clicking the button. The product seems to be working fine with Canon 600D. Later, I read somewhere the RC6 won't work with ...
0
votes
2answers
123 views

How can I use a remote shutter release during IR photography with a D3s without leaking into the image?

I'm using a D3s for infrared photography. I'm trying to use a shutter remote to take the images, but the remote's IR-emitting LED/photodiode is emitting enough light to leak into my image on the ...
0
votes
2answers
103 views

Why is my IR camera recording images when no IR light is present?

Why is it that with my camera (an old DVT Legen) and an 850nm IR pass filter, I see light in my images even when no IR light is present? Only light source is a fluorescent light.
0
votes
2answers
216 views

Where can I find (plastic) IR-cut filter material?

Is there any supplier of IR cut filter material? I.e., material that will block IR as opposed to allowing it to pass through? Preferably plastic, as I would like to be able to cut and shape it as ...
0
votes
0answers
71 views

How to determine infrared filter size [duplicate]

I am planning to try out a infrared filter for the first time. I have a Pentax K-50 camera and a Pentax 35mm DA L F2.4 AL Lens. How do I determine the size and type of infrared filter needed? Also, ...