What is the Most Important Part of the Infrared Lens?

If you're thinking of getting an infrared lens for your camera, you might be asking yourself what the most important part of the infrared lens is. There's so much to learn about the lens that it might seem like an overwhelming task. However, by learning about the different parts of the infrared lens and their functions, you'll be well on your way to making the right decision for your needs.

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Circular IR filters

Using IR filters can be a great way to take advantage of infrared photography. The benefits include a clearer image, the ability to see details in vegetation, and the ability to make sharper distinctions between buildings and their surroundings. It's also possible to produce striking landscapes, and may even give a photographer an opportunity to differentiate their offerings.

Before you decide to use an IR filter, you should check your camera's lighting. Infrared light isn't visible in overcast conditions. You can also use a light meter to measure light.

Choosing the right lens can also help you achieve the best results. A good lens will allow you to get a sharp image without too much flare. However, you'll need to experiment with different lenses to find one that works well for you.

For example, a lens with a low focus shift will require a little bit of trial and error to get it right. Most older lenses don't have a focus shift indicator, so you'll have to try to work out the correct amount by experimenting.

Choosing a high-quality fixed ND filter in anindustrial fixed focal lens can be a huge help with IR filtration. These types of filters cut a certain amount of light and are the most precise.

When it comes to IR filters, there are several varieties. They range in price, size, and color. Each filter is designed for a specific part of the IR spectrum.

One of the most popular IR filters is the Hoya R72. This filter is a very inexpensive option that produces excellent IR images.

Another filter that is commonly used is the 665nm filter. This filter is a good choice for a classic white IR look with blue skies. It's also an alternative to using the Wratten 87c filter, which is the optimal choice for deep IR applications.

Choosing the right polarizer is another good idea. Polarisers can be used to vary the amount of visible and infrared light in a single exposure.

While it's true that most IR filters are circular, you can still choose a rectangular one. With a rectangular filter, you can fit several lenses in front of it.

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Focus shift

An infrared lens is a special kind of camera that is used to take pictures in the infrared spectrum. This is a little bit of a problem because most lenses are not designed to focus infrared wavelengths on the same plane as visible light. However, there are some tricks and hacks to make this possible.

The IR Focus Shift function of your DSLR is one way to make this possible. In this mode, the camera is commanded to refocus itself when it senses a focus shift. It's not the best solution, but it's one that works.

Focus stacking is another method of making the most of your lens. By combining a series of shots with similar aperture settings, you can improve depth of field. Of course, if your lens has a shallow depth of field, you may want to stop down the aperture a little.

Focus stacking is also useful if you are photographing a moving subject. You can set the camera to shoot a series of photos at a specific time interval. This can be done by either setting the focus ring on the lens or by repositioning the camera on a focussing rack.

As you might imagine, it's a lot easier to perform focus stacking on a stationary subject. For example, if you are observing a butterfly at a botanical garden, you will be able to see the wing better if you take a series of photos at different f-stops. Likewise, if you are photographing a model on the runway, you'll be able to see the model more clearly if you take a series of photos with a similar shutter speed.

Although this function is not as common in newer digital cameras as well as industrial lens as in the film days, it's worth a look if you use your DSLR to photograph in the infrared spectrum.

A 15mm f/4.5 Voigtlander is an example of a quality infrared lens that is capable of producing a depth of field from five inches to infinity. If you're not comfortable experimenting with this particular lens, however, you might be better off sticking to a standard f/1.4 or f/1.2.

Lens coatings

Optical coatings for infrared materials have evolved with automation and ion assist deposition techniques. These coatings provide moisture protection, radioactivity protection and absorption rates. However, there are differences between the properties of each coating. They rate differently based on the materials used, absorption rates, and product life expectancy.

For a lens coating to be useful, it must have a high standard, good optical performance, and a long life. This means that the cost/benefit ratio of the lens coating must be carefully considered.

The surface figure is an important factor to consider when choosing an infrared lens coating. It relates to the material and the geometry of the lens. A typical specification is a 60-40 scratch-dig polish in MW, or an 80-50 scratch-dig polish in LW.

Another major consideration is the thickness of the coating. The thickness of each layer is determined by the target wavelength. With high-performance coatings, the optical performance can be retained under the most extreme conditions.

Ophir's line of optics includes three different types of coatingsn with high-end lens. Each is designed to perform well and balance low absorption. In addition, Ophir engineers developed calorimetric methodology and an absorption station to measure the lens temperature increases caused by absorbed laser radiation.

Duralens Extra is a new lens coating that allows for maximum transmittance while reducing thermal lensing. It also provides improved focus accuracy. To achieve this, new manufacturing technologies and techniques are required.

Several other infrared materials exist. They include chalcogenide series glasses. These have a lower dn/dT and simplify athermalization. Their indices of refraction are also much lower than those of other IR materials. Without a lens coating, these materials cannot be used.

Optical coatings for infrared material are available from a variety of manufacturers. These coatings are applied to the front surface of the lens. They improve the overall contrast of the image, reduce reflections, and improve image clarity.

Manufacturers may choose to use colored lens coatings. Black coatings are best for increasing lens life. If you want to avoid the use of black lenses, then opt for an anti-reflective coating.


An infrared lens is capable of capturing details not seen with conventional lights. However, it is not easy to get the right settings in your camera. Fortunately, you can process your infrared photos to enhance your work. These techniques include changing the color and contrast, making it more realistic, or creating a false color image.

The most common technique used to process an infrared image is black & white conversion. This process will remove Moire patterns, and aliasing artifacts from the pixels of your photo. It is also helpful in adjusting the color separation between the light and dark areas of the picture. To adjust the colors, you can use a color balance adjustment layer. In Photoshop, you can also use a Camera Raw Filter.

If you are using an infrared lens with a digital camera, you have more options for processing your images. In addition to changing the color and contrast of your photo, you can process it as a B&W image, or as a false color image. By adding a grayscale slider in Photoshop, you can create a color separation between the cyan and red shades of your image.

Another post-processing trick for infrared photography is to use a gaussian blur in your IR photo. The gaussian blur can be applied to the IR layer before combining it with your color image. You can also increase local contrast in your IR photo to enhance the image.

You can also create a soft contrast in your IR photo by adding puffy clouds in Large format lens. Although the sky in an infrared photo usually looks pinkish, the effect can be very pleasing.

To achieve a bright infrared image, you will need a bright day. A dark sky can add interest, but can detract from the photo. Also, make sure to focus on a bright subject.

Depending on your infrared lens, you may need to adjust the white balance. If you are not sure how to adjust your white balance, you can rent a lens to test it.

You can also convert your infrared photo into a B&W image directly from your camera. If you do not have a raw file, you can use the Camera Raw Filter in Photoshop.