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30 votes

Is there a black and white physical filter?

Pardon me while I get a little metaphysical for a bit. "Color" as we understand it isn't a real property of anything in the universe. It's something created by our vision system — a complicated ...
mattdm's user avatar
  • 143k
19 votes
Accepted

Is there a black and white physical filter?

No. It is not possible to create a physical filter that can completely "De-saturate" incoming light. The only way to achieve this without post-processing is at the film / sensor level.
Digital Lightcraft's user avatar
17 votes

Which color filter do I use for a black & white portrait?

There is a really important diference if you are using film or is a digital photo. I will focus on Digital aspects but will give you an idea of what to expect with film. The method I am using is ...
Rafael's user avatar
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16 votes

Is there a black and white physical filter?

All color is a result of software processing. The only thing a sensor, be it film or semiconductor, can do is change state in response to incoming photons. Yes, a digital camera has color filters, ...
Carl Witthoft's user avatar
14 votes

Is there a black and white physical filter?

You can't add a physical filter, but you can remove a physical filter to convert any digital camera to a strictly monochrome camera. The actual sensor on any DSLR knows nothing about color - each ...
Nathaniel Bubis's user avatar
11 votes
Accepted

Where can I find a filter similar to taking a photograph through green Ray-ban sunglasses?

The Ray-Ban B-15 created for the US Air Force. These are brownish and block 100% of all UV rays and only 15% of the remaining visual rays. The most popular for general use is the Ray-Ban G-15, a ...
Alan Marcus's user avatar
  • 39.3k
11 votes

Are there reasons to use colour filters with digital cameras?

It depends. Especially when producing images that are viewed in monochrome/B&W. If digital sensors had unlimited dynamic range it wouldn't matter so much, but we all know that they are limited by ...
Michael C's user avatar
  • 175k
10 votes

Local version of "White balance" in GIMP to clean up photo of document

I assume you have a gradient in overall brightness due to unevben lighting. If that's the case, what you could do is to duplicate the layer with the image and apply the best correction to each part of ...
clabacchio's user avatar
  • 2,219
7 votes

Is there a black and white physical filter?

It's sort of theoretically possible, but not it's not generally practical. To do it, you need a relatively narrow band-pass filter that restricts the light that passes through to the point that only ...
Jerry Coffin's user avatar
  • 19.3k
7 votes

Do I still need to use color filters for images that are to be presented in monochrome (B&W)?

If you are serious about digital B&W photography, you will probably use editors that allow adjusting the tones via multiple color channels. I find this superior to traditional glass B&W ...
MirekE's user avatar
  • 5,205
6 votes

Is there a black and white physical filter?

No. Each colour camera has three types of sensitive material - pixels in digital cameras, pixel layers in Foveon sensors, layers in colour film. Image being monochrome means that all those types ...
Euri Pinhollow's user avatar
6 votes

What is the effect where some objects are a single bright color but the rest is black and white?

It's called Selective Color Although masking techniques can be used to create such an image, most of the time one can use a simple Hue-Saturation-Luminance tool that is contained in many photo ...
Michael C's user avatar
  • 175k
6 votes
Accepted

Why do color channels from a digital camera respond slightly to lights of other colors?

There are at least two reasons this happens: There are very few pure (single / narrow frequency band) light sources. That is to say, your red light is not strictly confined to the "red" end ...
scottbb's user avatar
  • 32.9k
6 votes

Can physical color filter and light pollution filters on DLSRs achieve anything that can't be done in post (like with Photoshop)?

No filter shifts any wavelength of light. Filters attenuate some wavelengths more than others. Filters which attenuate along a curve with a complex shape can often be useful because they save a lot of ...
Michael C's user avatar
  • 175k
5 votes

Why does this satellite image of an airplane in motion show red, green, and blue bands with strange artifacts?

Looking at the imagery, it was not provided exclusively by a satellite. I work for the company that built the sensors and cameras for Digital Globe WV3 and WV4 sensors and did sensor, motion ...
mongo's user avatar
  • 343
5 votes
Accepted

Do I still need to use color filters for images that are to be presented in monochrome (B&W)?

It depends. If digital sensors had unlimited dynamic range it wouldn't matter so much, but we all know that they are limited by their noise floor. By using the color filter at the time you shoot, ...
Michael C's user avatar
  • 175k
5 votes
Accepted

How do different colours look in Infrared Light?

How do different colours look in Infrared Light? They don't look like anything in infrared light. A "true color" infrared image would appear totally black to human eyes. What we define as "color" is ...
Michael C's user avatar
  • 175k
5 votes
Accepted

What is the purpose of an orange filter that comes with Canon flash?

Yes, this is for color matching. If you're mixing flash with ambient light from tungsten or some CFLs (often marketed as "soft" or "warm" white), you want to warm up the color temperature of your ...
Gern Blanston's user avatar
5 votes

What are pink and purple filters used for?

Modern digital (electronic) cameras are able to self-adjust “color balance”, (optimize) the overall color of the resulting picture. In other words, pictures taken in daylight with a vast amount of ...
Alan Marcus's user avatar
  • 39.3k
4 votes

Underwater split photography and filter combination

My personal experience with underwater photography show me how hard is to make such split photo. You can deal with green by shooting RAW (if your GoPro permit it). Later in PS or LR you can adjust ...
Romeo Ninov's user avatar
  • 12.2k
4 votes

How do different colours look in Infrared Light?

As @null said, infrared is an invisible (to the eye) band of frequencies beyond what we can see. It's hard to quantify how visible colors translate to monochrome- it has more to do with how they are ...
BobT's user avatar
  • 6,744
4 votes

What are pink and purple filters used for?

What are these used for? For B&W film photography: To change the relative brightness of objects that are various colors in the scene. Color filters allow you to control what shades of grey ...
Michael C's user avatar
  • 175k
3 votes

Is there a black and white physical filter?

It's not a filter--not removable and definitely not reversible--but any digital camera can be converted to greyscale by scraping the color filters off the sensor and processing the RAW image. Without ...
xephyranths's user avatar
3 votes

Why do color channels from a digital camera respond slightly to lights of other colors?

Why do color channels from a digital camera respond slightly to lights of other colors? Because the filters placed in front of the silicon on a Bayer masked filter all allow some of all the ...
Michael C's user avatar
  • 175k
3 votes

What is the purpose of an orange filter that comes with Canon flash?

The generic term for these filters is "CTO" (Color Temperature Orange). The main use is to match the color cast of the "flash" to the color cast of the "ambient" light (such as the sunlight during ...
Tim Campbell's user avatar
  • 3,957
3 votes
Accepted

How to correct colour from flash (shooting instant colour photograms)

To neutralize colors, add the complementary color. Cyan – Red Magenta – Green Yellow – Blue So for a greenish photo, you can try a magenta gel over the flash or color-correction filter over the lens....
xiota's user avatar
  • 27k
3 votes
Accepted

Does Darktable editor have vintage film filters?

Color Look Up Table (different than the LUT 3D module and Velvia module referenced in the other answers) is the Darktable module that has film emulation presets for Fuji Astia, Fuji Provia and Fuji ...
user610620's user avatar
2 votes

Is there a black and white physical filter?

In cameras the incident light is filtered to three coordinates of RGB spectra and then captured using chemical reaction (film cameras), CCD or CMOS chip (digital cameras). The only way how you can ...
Crowley's user avatar
  • 1,808
2 votes

Which filter do I need to perform NDVI measurements?

Five years on this topic remains of research interest, particularly regarding drone carried cameras, so another answer is probably of some value. The AgEng2012 site linked above has been removed but ...
Todd West's user avatar
  • 121

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