DIRKON CAMERA PDF

Vomi Dirkon [] The camera must be cut out of stiffer paper than ordinary office paper or thin card. Very few good magazines were available and were difficult to get hold of, so people would borrow and exchange them when given the opportunity. News by brand and category: BlackBerry smartphone with keyboard pinholw. Sony PlayStation VR headset released. John Aldred is based in Scotland and photographs animals in the studio and people in the wild.

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The camera obscura or pinhole image is a natural optical phenomenon. Light enters a dark box through a small hole and creates an inverted image on the wall opposite the hole.

Over the centuries others started to experiment with it, mainly in dark rooms with a small opening in shutters, mostly to study the nature of light and to safely watch solar eclipses. Giambattista Della Porta wrote in in his Magia Naturalis about using a convex mirror to project the image onto paper and to use this as a drawing aid.

However, about the same time, the use of a lens instead of a pinhole was introduced. In the 17th century, the camera obscura with a lens became a popular drawing aid that was further developed into a mobile device, first in a little tent and later in a box.

The photographic camera, as developed early in the 19th century, was basically an adaptation of the box-type camera obscura with a lens. Sir William Crookes and William de Wiveleslie Abney were other early photographers to try the pinhole technique. The size of the cylinder corresponded with their phonograph cylinder as they wanted to combine the moving images with sound recordings.

Problems arose in recording clear pictures "with phenomenal speed" and the "coarseness" of the photographic emulsion when the pictures were enlarged. The microscopic pin-point photographs were soon abandoned. The camera that recorded the images, dubbed Kinetograph, was fitted with a lens. After he chose to continue his experiments with pinholes replacing the lenticular screen.

But it is more often used without a translucent screen for pinhole photography with photographic film or photographic paper placed on the surface opposite to the pinhole aperture. A common use of pinhole photography is to capture the movement of the sun over a long period of time. This type of photography is called solargraphy.

Pinhole photography is used for artistic reasons, but also for educational purposes to let pupils learn about, and experiment with, the basics of photography. Pinhole cameras with CCDs charge-coupled devices are sometimes used for surveillance because they are difficult to detect. Modern manufacturing has enabled the production of high quality pinhole lenses [7] that can be applied to digital cameras; allowing photographers and videographers to achieve the camera obscura effect.

Characteristics of pinhole camera photography Edit Pinhole photographs have nearly infinite depth of field , everything appears in focus. Exposure times are usually long, resulting in motion blur around moving objects and the absence of objects that moved too fast.

Other special features can be built into pinhole cameras such as the ability to take double images by using multiple pinholes, or the ability to take pictures in cylindrical or spherical perspective by curving the film plane.

Construction Edit A home-made pinhole camera on the left , wrapped in black plastic to prevent light leaks, and related developing supplies Pinhole cameras can be handmade by the photographer for a particular purpose. In its simplest form, the photographic pinhole camera can consist of a light-tight box with a pinhole in one end, and a piece of film or photographic paper wedged or taped into the other end.

A flap of cardboard with a tape hinge can be used as a shutter. The pinhole may be punched or drilled using a sewing needle or small diameter bit through a piece of tinfoil or thin aluminium or brass sheet. This piece is then taped to the inside of the light-tight box behind a hole cut through the box.

A cylindrical oatmeal container may be made into a pinhole camera. The interior of an effective pinhole camera is black to avoid any reflection of the entering light onto the photographic material or viewing screen.

This allows the angle of view of the camera to be changed and also the effective f-stop ratio of the camera. Moving the film closer to the pinhole will result in a wide angle field of view and shorter exposure time. Moving the film farther away from the pinhole will result in a telephoto or narrow-angle view and longer exposure time. Pinhole cameras can also be constructed by replacing the lens assembly in a conventional camera with a pinhole.

As a result of the enormous increase in f-number , while maintaining the same exposure time, one must use a fast film in direct sunshine. Pinholes homemade or commercial can be used in place of the lens on an SLR. Use with a digital SLR allows metering and composition by trial and error, and is effectively free, so is a popular way to try pinhole photography.

Selection of pinhole size Edit Up to a certain point, the smaller the hole, the sharper the image, but the dimmer the projected image. Within limits, a smaller pinhole with a thinner surface that the hole goes through will result in a sharper image resolution because the projected circle of confusion at the image plane is practically the same size as the pinhole. An extremely small hole, however, can produce significant diffraction effects and a less clear image due to the wave properties of light.

The best pinhole is perfectly round since irregularities cause higher-order diffraction effects and in an extremely thin piece of material.

Industrially produced pinholes benefit from laser etching, but a hobbyist can still produce pinholes of sufficiently high quality for photographic work. A method of calculating the optimal pinhole diameter was first attempted by Jozef Petzval.

The sharpest image is obtained using a pinhole size determined by the formula [12] d.

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Mauzuru BlackBerry smartphone with keyboard surfaces. By using our website and services, you expressly agree to the placement of our performance, functionality and advertising cookies. Sign up for the Make: I wonder if this idea could be extended to making a simple old movie camera like a Bolex the Dolex? Or the guts from an old digicam? Please check your email. Dirkon-ized Leica M3 The ex-sovereign state was peacully split into two independent countries, the Czech Republic and Slovakia. Newsletter to keep you inspired with new projects and more product reviews.

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DIY Dirkon Paper Camera

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