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The NOA 63 can withstand temperatures of-15 to 60° C when used to bond glass optics. In some cases, temperatures to 90° C are possible when the adhesive is used as a film or coating. The latter would depend upon the application.

The NOA bond can be separated in chlorinated solvent such as methylene chloride. The bonded area must be soaked in the solvent and normally will separate overnight if only precured. Longer times may be necessary depending upon the extent of the cure and the size of the bond area.

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Smoothing or softening of waterBy using an ND filter, you can achieve longer shutter speeds, which in turn creates a blur effect on moving water. This effect is commonly used in landscape photography, particularly when capturing waterfalls or streams. The result is a smooth, flowing image that creates a sense of movement and tranquility.Emphasizing water flowSimilarly, ND filters can also be used to emphasize the flow of water in an image. By choosing the appropriate filter strength, you can create a balance between the blur effect and the detail of the water. This technique is particularly useful in capturing the energy and power of ocean waves.Smoothing or softening of cloudsND filters can also be used to create a dreamy effect on clouds. By using a long exposure, the clouds will appear to move across the sky, creating a sense of movement and dynamism. This technique is particularly useful in landscape photography, where a dramatic sky can add depth and dimension to an image.Emphasizing movement in an imageND filters can also be used to emphasize movement in an image. By using a long exposure, you can create a blur effect on moving subjects, such as people, cars, or animals. This technique can add a sense of energy and motion to an image, making it more dynamic and interesting.Creating cloud movementIn addition to creating a blur effect on clouds, ND filters can also be used to create a sense of movement and direction in the clouds. By using a filter with a longer exposure time, you can create streaks of cloud movement that add a sense of drama and tension to an image.Removing moving objectsLastly, ND filters can be used to remove moving objects from an image. By using a long exposure, anything that moves within the frame will be blurred or disappear entirely. This technique is particularly useful in busy scenes, such as cityscapes or tourist attractions, where you want to remove distracting elements from the image.

Norland Optical Adhesive 63 (NOA63) is a clear, colorless, liquid photopolymer that will cure when exposed to ultraviolet light. Since, it is a one part system and 100% solid, it offers many advantages in bonding of optical elements where the bonding surface can be exposed to light. The use of NOA 63 eliminates premixing, drying, or heat curing operations common to other optical adhesive systems. Curing time is remarkably fast, and is dependent upon the thickness applied and the amount of ultraviolet light energy available.

Neutral density filters are an essential tool in every photographer and videographer’s toolkit. By understanding the different types of ND filters and how to use them, you can unlock their full potential and enhance your photography and videography skills. Remember to experiment with different densities and filter types to achieve the desired effect in your images. With a little practice, you’ll be able to master the art of using ND filters and take your photography and videography to the next level.

Norland OpticalAdhesive 61 price

Norland OpticalAdhesive 61

Care should be taken in handling this material. The Material Safety Data Sheet should be read for this product as well asfor any associated products such as alcohol, acetone or methylene chloride. Prolonged contact with skin should be avoided and affected areas should be thoroughly washed with copious amounts of soap and water. If the adhesive gets into eyes, flush with water for 15 minutes and seek medical attention. Use the material in a well ventilated area, otherwise a NIOSH approved organic vapor mask is recommended.

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A neutral density filter or ND Filter is a camera accessory that reduces the amount of light entering the camera lens, allowing for a longer exposure time. The filter’s primary function is to balance the exposure of a scene by reducing the brightness of the brightest elements without affecting color or contrast. ND filters come in different levels of density, which determine the amount of light that passes through the filter.ND Filters enable you to capture sharper images and photograph at larger apertures allowing you to control diffraction.  For example, if the subject is a waterfall during the day and the target shutter speed is 2 seconds to smooth out the flowing water, without an ND the aperture will be small ie f/22 and this will cause a reduction in sharpness due to diffraction. With an ND Filter, it will allow you to reduce the aperture ie f/10 to get a sharper image.

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Shelf life of the liquid is at least 6 months from the date of shipment if stored in a cool (5-22° C), dark place in the original container. If refrigerated, allow the adhesive to come to room temperature prior to use.

NOA 63 is recommended for the bonding of achromats, prisms and all other precision compound optics. The outstanding characteristics of the adhesive are its low fluorescence and its excellent transmission in the near UV range. After full cure, the adhesive has good transmission from 320 to 3,000 nanometers. This adhesive is also suitable for bonding glass to metal. The high viscosity of NOA 63 allows it to be applied as a self-supporting drop or bead along the edge of a precision component to bond it to the substrate. The adhesive cures well in thick sections and has low shrinkage and a slight resiliency to minimize strain.

Now that we’ve explored the different types of ND filters let’s dive into how to use them to their maximum potential.Controlling ExposureThe primary use of ND filters is to control exposure. For instance, if you’re shooting a waterfall or a flowing stream, you may want to use a slower shutter speed to capture the water’s motion. However, doing so without an ND filter would result in overexposed images. By using an ND filter, you can reduce the amount of light entering the lens, allowing for a slower shutter speed.Creating Motion Blur and Capture a Sense of TimeND filters are useful in creating motion blur in your images. By using a slow shutter speed, you can capture the movement of clouds, water, or any other subject that moves, resulting in a visually appealing image.Balancing ExposureND filters are perfect for balancing exposure when shooting a scene with a significant difference in brightness between the foreground and the sky. By using a graduated ND filter or GND, you can position the denser part of the filter over the brighter area, achieving a balanced exposure.Shooting Wide Aperture in Bright LightShooting wide aperture in bright light can be challenging, as it can result in overexposed images. Using an ND filter, you can reduce the amount of light entering the lens, allowing for a wider aperture and a shallower depth of field.

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There are various types of ND filters, each with its unique characteristics and applications.Solid ND FiltersSolid ND filters are the most common type of ND filters. They are available in different densities, ranging from ND2 (1 Stop) to ND100K(20 Stop), with each density value indicating the number of stops by which the filter reduces light. Solid ND filters are useful in situations where you want to achieve a longer exposure time during the day or when using a wide aperture.Graduated ND Filters Graduated ND filters have a graduated density that varies from one end to the other, with one side being denser than the other. These filters are useful when shooting a scene with a significant difference in brightness between the foreground and the sky. By positioning the denser part of the filter over the brighter area, you can achieve a balanced exposure.Variable ND FiltersVariable ND filters allow you to adjust the density of the filter by rotating the filter ring. These filters are perfect for situations where lighting conditions are continually changing, such as shooting in a forest or near the water.

Member of Meridian Adhesives Group, the company Epoxy Technology Europe SRL (formerly known as Gentec Benelux) is a solutions provider addressing problems related to precision assembly, adhesives, encapsulants, coatings, UV curing and UV light measurement for a wide range of industries.

Some of the light sources that can be used to cure the adhesive are sunlight, mercury lamps, and fluorescent black lights.

NOA 63 is cured by ultraviolet light with maximum absorption in the range of 350 to 380 nanometers. The recommended energy required for full cure is 4.5 Joules/sq. cm of long wavelength UV light. In most optical applications, curing is done in two steps. First a short exposure, or precure, is used. This cures the adhesive enough to allow it to be handled without disturbing the alignment, and keeps the number of alignment fixtures to a minimum. At this time, parts can be inspected, and excess adhesive can be cleaned up with an acetone or alcohol moistened cloth. Any rejected pieces are most easily separated at this stage. Cure is completed by exposure for the remainder of the cure time.