Od nd filter

Image sensor format, sometimes referred to as optical format or sensor size, refers to the shape and size of the image sensor in a digital camera. The ...

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May 29, 2024 — When your eyes are misaligned, they don't move accurately together. The images are formed on different parts of your retinas and you see double.

We offer testing and refiguring of finished mirrors. The price depends on the condition and quality of the mirror and the stages to be performed. Sometimes it is necessary to grind, polish and figuring the mirror, sometimes only polish and figuring, and sometimes only figuring. This can be assessed after an interferometric mirror test, which we do before starting.You can see on the pictures the condition of a refigured mirror before and after processing.

Variable ND

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Making a quality telescope mirror is a complex and delicate process that need highly skilled work from experts in this field.

Our telescope mirrors are extremely precise made from Borofloat33 and Supremax glass of the German company Schott and accompanied by a certificate from interferometric tests, which ensures a high quality. With a thickness of 25 mm, they are light and have a very short tempering time.7

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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.

A UV filter is a popular camera accessory that is designed to protect your lens and improve the quality of your images. But do you really need one?

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Our telescope mirrors are made by our own computer-controlled method. In most methods used, the parabolizing tool reaches and stops at a specific area that is selected for processing. Thus, small areas are formed on the surface and it is impossible to obtain a smooth surface. The uniqueness of our method is that during processing the parabolizing tool always passes through the entire surface of the mirror and through all areas. Thus, at each stage of parabolization, a smooth and smoothly changing curve is achieved. The parabolic surface thus achieved at the end is of excellent quality, smooth and without zonal errors. The indicator for quality Strehl is always more than 95%, usually 97% – 98% as you can see here.

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.

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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.

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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.

We produce handcrafted reflecting telescopes and optical mirrors since 2006. We are not a mass producer of common products; we only make a limited number of orders. This is because we complete them to the highest standards. The amount of time and effort we put into hand crafting every piece, both for our optics and the frame, is what allows us produce telescopes of excellent quality. All of our products, as well as our finished telescopes, go through a number of quality assurance tests, to guarantee an unforgettable viewing experience. Our telescopes and mirrors are intended for those who appreciate high quality and precision craftsmanship.

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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.