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6 votes
Accepted

Can I convert a regular digital camera so the R-G-B channels actually represent different infrared bands?

Not really. If you want to take a hack at it, the first thing you'll need is the transmittance curves of your (presumably Bayer) color filter. Then,if you're lucky, there's an NIR wavelength at ...
Carl Witthoft's user avatar
4 votes
Accepted

Can I use on-lens IR filter for a full-spectrum converted camera?

One note: What is meant by "IR filter" depends on the context in which the term is used. When we say the camera has an "IR filter" in the stack of cover glass in front of the ...
Michael C's user avatar
  • 175k
4 votes

Nikon D3100 converted to Infrared only takes red pictures

If the camera was modified to pass mostly IR light, then this is normal. You need to convert the images to monochrome. Take a picture of foliage outside. Then desaturate completely. If the foliage ...
Mattman944's user avatar
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4 votes
Accepted

Why isn't using exposed, undeveloped film working as a filter for my DIY infrared camera modification?

If you want to use film as an infrared filter, you need to use developed color film. Whether it should be unexposed or exposed depends on whether it is slide or negative film. Regardless, you should ...
xiota's user avatar
  • 27k
4 votes
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What is a more accurate name for "Full-spectrum" photography?

Every field of study and practice has established terminology and usage. It generally does not make sense to apply the jargon of one to another. For instance, suppose you take photos with a "720nm" ...
xiota's user avatar
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3 votes
Accepted

Can I remove the IR filter from the sensor, and use a IR bypass filter on the outside of the lens instead?

The on-sensor optical filter has an effect on the optical distance between the sensor and the objective. Whenever you remove glass from the space between the sensor and the objective, you are very ...
Euri Pinhollow's user avatar
2 votes

Is there any real need for substitute filters for a manual-focus, live view full spectrum conversion?

Removing glass from the light pathway would result in the loss of infinity focus unless you can decrease the distance between the lens and sensor "past" infinity. Helicoids, bellows, extension tubes ...
xiota's user avatar
  • 27k
2 votes

Red wavelengths for everyday photography

Camera imaging sensors are much more sensitive to longer wavelengths than human vision. The normalized response of the "red" sensitive cone cells drops off rapidly above 640nm. A camera without ir ...
doug's user avatar
  • 1,217
2 votes

Red wavelengths for everyday photography

With few exceptions, data for infrared filters are not published for the region from 700 to 900nm. This is because most infrared filters are offshoots of the Wratten gelatin filters recipe. These were ...
Alan Marcus's user avatar
  • 39.4k
2 votes

Can I remove the IR filter from the sensor, and use a IR bypass filter on the outside of the lens instead?

By adding a filter to the front of the lens, you are adding an air-glass interface (between the back of the filter and the front of the lens) that wasn't designed into the camera. This additional air-...
scottbb's user avatar
  • 33.1k
2 votes

Can I use on-lens IR filter for a full-spectrum converted camera?

Typically, digital sensors are sensitive to Ultraviolet , Visible, and Infrared frequencies. A band pass filter is installed in the optical path to eliminate both UV and IR frequencies. This bandpass ...
Bob Macaroni McStevens's user avatar
2 votes

What are the advantages of an 830nm infrared filter, in comparison to 720nm?

I can only offer some decade old empirical observations and mostly coming from comparing results on film: With longer wavelength, the chances of capturing Wood's effect are better. Longer wavelength ...
MirekE's user avatar
  • 5,223
2 votes

Can ImageMagick do channel difference and swap?

Check out the -color-matrix operator to see if it meets your needs. From your description, I think the following RGB matrix transform will work: ...
scottbb's user avatar
  • 33.1k
2 votes

How to convert a photograph to look like a thermal infrared spectrum image?

If you know how to make duotones in Photoshop, you can get something similar with a quadtone containing the four main colors and a Gaussian blur. But no program will know which is the hot or cold ...
Danielillo's user avatar
  • 1,779
1 vote

Can I use my Samsung A51 smartphone camera to look at the red/near-infrared region?

-I assume near-infrared pixels will be labeled in most software as 'red'. Would there be any app which enables me to separate (even false-color differently) shorter-wavelength red from longer-...
Kevin Reid's user avatar
1 vote

Post-process custom WB for full-spectrum photo?

Your 590nm filter still eliminates a lot of visible light on the blue end from reaching the camera's sensor. When you try to create a custom WB, though, you're telling the camera you want to end up ...
Michael C's user avatar
  • 175k
1 vote
Accepted

Post-process custom WB for full-spectrum photo?

I'm guessing that you've removed the infrared and UV (lowpass) filters from your camera? The purpose of those filters is to limit the light hitting the sensor to be predominantly in the human ...
user10216038's user avatar
  • 2,239
1 vote

Nikon D3100 converted to Infrared only takes red pictures

A normal color balance will produce red/pink images. Perfectly fine. Easiest fix? Get a white sheet of paper outside, hold it up, take a photo. Then use that as the 'custom white balance' (I don't ...
J.Hirsch's user avatar
  • 1,057
1 vote

What is a more accurate name for "Full-spectrum" photography?

You may also find the term 'Hyperspectral' or 'Multispectral' useful. A standard camera producing R,G,B is 'multispectral'. I don't know if you're attempting to generalize a modified camera (such as ...
J.Hirsch's user avatar
  • 1,057
1 vote

What are the advantages of an 830nm infrared filter, in comparison to 720nm?

On digital the 720nm and 830nm filters work rather similar. The sky will be about as black on both, the grass as white. Shadows will be somewhat blacker on the deep IR (the longer wavelength, the less ...
Jindra Lacko's user avatar
  • 5,990
1 vote

What are the advantages of an 830nm infrared filter, in comparison to 720nm?

It only makes a difference if your film or your solid-state sensor has reasonable sensitivity between 720 and 830. (and of course that your lens itself doesn't block). The total exposure at a given ...
Carl Witthoft's user avatar
1 vote

Where is the color mosaic filter on a DSLR sensor?

The color filter array is typically right on top of the sensor, under an infrared filter panel. After removing the IR filter, the CFA can be mechanically scraped off of the sensor: Effects of this ...
feetwet's user avatar
  • 3,603

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