The Heliopan Series 7 Light Red Filter is a basic contrast filter, primarily for use with black and white film, that completely absorbs blue and green tones ...

Diffusionoflightin Physics

The pracitice of increasing the size of a light source is often discussed in conjunction with diffusing it (i.e. by shining a fresnel through a trace frame with diffusion, one increases the size of the light source since the diffusion BECOMES the new light source). At my school, this is often given as the justification for why diffusion makes a light softer.

Although our eyes only see visible light, here are some observations and an approach to learning how to “see” infrared light. With a few tips, you will be well on your way to understanding infrared light.

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Consider shooting during the blue and golden hours as well. Your images will have a magical feeling at those times of the day. I prefer the early morning, about an hour and a half to two hours before sunrise. For me, by the time the sun comes up, the light becomes harsh, and the shadows can be very dark.

If you process infrared for black-and-white, no matter where you live, you can make beautiful images in the city, the mountains, the seaside, or the forest. No time of year is bad for infrared, and no subject is off-limits. I feel that setting up the infrared camera back to display in black-and-white has made me a better photographer – my compositions quickly improved the more I shot, and I understand the full spectrum of light better by working in infrared.

Looking at the image in monochrome on the back of the camera taught me where, how, and if the infrared light appeared in the scene. It is possible you won’t find anything that is reflecting the infrared light.

Light diffusionSheet

Light diffusionkit

This instructable will guide you through the process of using a prism to create a spectrum of light.

Diffusedlightphotography

However, diffusing a light and increasing its surface area are clearly NOT the same thing (even though one sometimes causes the other). I can use the example of an LED array (like the tecpro felloni, which I have some experience with) - attaching a sheet of diffusion directly to the panel will make the light less collimated without increasing its surface area, whereas using multiple panels will increase the surface area without diffusing the light.

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Shooting into the sun or full moon usually results in flares when using infrared filters, either on the lens or sensor. Flare can be a creative concept, but it is a deal-breaker for me. Flares should not be confused with a lens hotspot. Lenses have special coatings to cut down on flare, but those lens coatings are ineffective when using an infrared-converted camera. Many times, when I review an image on the back of the camera and see a flare, all that is needed is to slightly change the camera’s position relative to the angle of the light source or change the focal length (longer or shorter).

Most beginners only shoot infrared during the spring and summer (peak green foliage) and only when the sun is very bright and high in the sky. You can tell what time of day a photograph was taken by looking at the shadows. If the shadows are tight and close to the subject, the sun is high, and it is probably summer. If the shadows are long and away from the light source, the image was taken around sunrise or sunset.

Side light is usually a light source to the left or right of the camera. The lower the sun is in the sky, the stronger the light will be. Watch for deep shadows on the “shade” side of your subject. Make sure you always have details in the shadows.

Light diffusionmaterial

2017510 — Yes, you can use a polarising beam splitter to divide the horizontal and vertical components, then you can pass the horizontal components ...

Can someone please explain to me what is happening to the quality of light in both of these examples, as well as how they differ in utility?

What is diffusedlightfor plants

I find that compositions with front light or strong side light are a good starting place to learn about visible or infrared light. Front light means you are standing between the subject and the light source, facing your subject with the light source to your back – just watch out for your shadow in the shot!

Now that the camera is set up for black-and-white capture, how do I see the infrared light? I cheat by looking at the monochrome JPG! In most cases, I lean on my years of success and failure in different conditions, but to start, I suggest looking for where visible light (sunlight or moonlight) reflects off the subject in the scene. Where is the light source? Where are you standing in relation to the scene and the light source? What areas are awash in visible light? Where are the shadows? Your “best” shot might be behind you!

I remember the first infrared exposure I made and what a shock it was to my system when the RAW file displayed on the back of my camera. What is THAT funky thing? How do I know what I am looking at? I got the idea (I am sure others did this, but I had no knowledge of it) to set the camera to capture both JPG and RAW. I set the JPG and, therefore, the camera display to monochrome. The RAW file is untouched, but the JPG is black-and-white.

When I started down the rabbit hole of infrared, there were no books or YouTube videos regarding what I wanted to do: make black-and-white landscape images at 720nm. Lots of information was available for faux color (590nm) but nothing for black-and-white. Only by shooting thousands of infrared frames in all kinds of conditions over the years did I learn what probably would happen and how it would render given my subject (i.e., rocks, foliage, water, skies).

Over seven years ago, I stopped making images in color and now only shoot with infrared-converted cameras. I have found that 720nm gives me the broadest range of tonalities for black-and-white, compared to 590nm or 850nm. For me, 590nm is too close to the visible light spectrum, which means my mid-tones would suffer, and 850nm has too much contrast and would require bracketing and blending to capture the full dynamic range.

Infrared light still surprises me constantly. I am never certain what I will get until I press the shutter. Test the light by making the shot. Review it to see the possibility. If the image works for you, keep it. If it doesn’t, ditch it. That’s the workflow. Clients in the field learn quickly not to ask me, “Do you think this shot will look good in infrared?” I always respond, “I don’t know. Make a shot, and let’s look at it.” Very quickly, they understand I am trying to encourage experimentation. When I see it, I will know if the shot worked and has potential through processing. I learn more from my failures than from my successes.

5 days ago — A few years ago, before ED overhauled the lighting engine, this wasn't much of a problem, since with low enough gamma setting in DCS (I flew ...

Shoot year-round. Shoot long exposures of clouds or water. One would think brown sea or marsh grasses in the winter would not pop white in infrared, but they do! Chlorophyll gives plants their green color, which turns white in 720nm and 850nm black-and-white infrared. Even though the brown shade of the dried grasses might imply the plant is dead, the chlorophyll still reflects the infrared light all year.

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Diffusionoflightexamples

A monochrome image on the camera display will instantly reveal your composition. Since my end goal is processing for black-and-white, the monochrome JPG is very close to the final processed IR image.

A big surprise for me was how the different minerals in the rocks in Death Valley render in infrared. Another shocker was that not all foliage will be white. For example, the short needle evergreens in Yellowstone National Park render black, much like visible light, whereas long-needle pine trees glow infrared. You won’t know until you make an image.

Diffused lighting interior design

It is a festival with Midosuji Illumination on Midosuji, Osaka's symbolic street, and Osaka Hikari-Renaissance, light art in Nakanoshima, forming the core ...

Remember to use your lens hood! And always take the time to look at your preview images thoroughly. I find it very hard to remove flares in post-processing, and it is best to try another shot while you are at the location. I use a Hoodman loupe in bright sun to cover the camera screen. It can be incredibly frustrating when you get a terrific shot, but it is unusable due to faint flare issues.

Penelope Taylor is a New Jersey-based photographic landscape artist. Her father introduced her to film cameras in her early teens. Her passion is traveling throughout the United States and Canada to capture her favorite subject — landscapes. In 2015, she began to exclusively produce work using Nikon digital cameras converted for infrared photography. In 2017, Penelope began to offer infrared-specific landscape photo workshops where she teaches capture and black-and-white processing techniques. She is available for group lectures and one-on-one instruction in person or online.

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Technical Lead of the aircraft simulator project. Grand Haven Aviation Association. Jan 2013 - Present 12 years. Science and Technology. The Grand Haven ...

I encourage you to be fearless. Experiment when you find something interesting to photograph. Ask yourself, “What would that look like in infrared?” When working with clients in the field, most refuse to press the shutter unless they can visualize the shot. If you only shoot infrared occasionally, chances are you don’t have enough experience to pre-visualize an image through the viewfinder in a spectrum we cannot see. The only way I learned was to shoot many frames and move around the subject until I finally “found” the infrared light.

Try experimenting with subjects other than green foliage, such as architecture, monolith rocks on land or at the edge of the sea, cacti or other plants, or morning fog in the trees.