Dec 31, 2019 — The Hoya Pro ND1000 is a 10-stop neutral density filter. If you like those shots with rivers that look like mist, this is what you use to ...

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Through our globally recognized Novanta brands in advanced photonics, ARGES, Cambridge Technology, Laser Quantum and Synrad, we deliver tailored laser and beam ...

The camera is dollying towards the actor on the ground so the focus puller is going from mark A to B.. While the camera is still pushing in, an ...

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MM González · 2001 · 26 — In this way, by moving the ruling, various Ronchi patterns are obtained with a known phase difference among them. Digital image techniques are used to obtain ...

In this case - diffraction - the key thing is the ratio of the width of somthing the wave passes through to the wavelength of the wave. - e.g. light passing through a window does not diffracted - visible light has a wavelengths of tens of millionths of centimetres - whereas most windows are tens of centimetres wide - this gives no diffraction that is easy to see. Audible sound waves have wavelgnths of centimeters and metres (roughly speaking) and the opening of the mouth is about the same size or smaller - which gives lots of diffraction.

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That seems to leave two things: the fact that the entire body vibrates when you speak - and thus there is some fraction of the sound being directed towards you even if the speaker is facing away) and diffraction - the bending of sound around the head of the speaker.

Generally that would be diffraction - the spreading out of a wave. Reflection is bouncing off objects - e.g. an echo of someone's voice. Refraction is about a wave changing direction e.g. water looks shallower than it is when viewed from above in air because the light from the bottom is refracted (bent) at the water/air surface.

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If the space is truly "open", then reflection should not play (since there is nothing to reflect off), and refraction can only play if there is a change in refractive index (which "normal air" would not have).

Tiffen 64Y12 Overview The Tiffen 4x6" Yellow 12 filter is commonly used for a noticeable increase in contrast with black and white films.

The FLIR IRW-4C IR Inspection Window makes the electrical inspection process safer and simpler with easy installation, proprietary PIRma-Lock reliability, and a ...

Parabolic mirrors will focus all incoming light rays to a single point. However, images from a parabolic mirror will have a defect called coma, where images ...

Objektiv Brennweite 4 mm . Auflösung: 5 Megapixel Brennweite: 4 mm Gewindegröße: 1/2″ Bildwinkel: 85.5° - Auflösung: 5 Megapixel - Brennweite: 4 mm ...

Scattered, diffuse light fills the space without overwhelming it, enveloping the subject tenderly. Another goal when shooting cinematically is to lay out an ...