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SINARBACK GETS PHOTOGRAPHIC IMAGES OF 10 MILLION PIXELS.

Photographers occasionally encounter subjects that require a particularly high resolution that even the new 2048 x 3072 pixel Philips chip cannot satisfy, as in subjects with very fine detail, like fabrics and textiles, interiors and architecture, furniture and vehicle photography, or reproduction and archiving of art and very large originals. Sinar has developed the Macroscan, which yields an effective image area of up to 24 cm2 with its chip. Every Sinarback can be updated to Macroscan capability with the patented Macroscan Adapter for the Sinar p2 Camera.

In a logical evolution of the Sinar Camera System, Sinar has expertly combined the advantages of the Sinar Digital Back with those of large format cameras by developing the Macroscan. The large image circle of Sinaron Professional Digital Lenses and the adjustment capabilities of large format cameras are utilized to their very best advantage by the large imaging area of the Macroscan. Perfect wide-angle photographs can be made in both landscape and portrait formats.

The Sinarback is the only digital back that combines the new Philips sensor (with up to 2048 x 3076 pixels) with active thermo-electrical cooling for noise-free images that feature consistent color in both 1- shot mode for moving subjects and the 4-shot mode for stills. With the Macroscan Adapter, Sinar has further increased the versatility of the Sinarback Digital Back by introducing variable resolution, thus providing a flexible solution for the best image quality in every photographic situation with a single camera system. Now, thanks to the Macroscan Adapter, the outstanding color rendition and imaging quality of the Sinarback is also available for high-resolution projects.

Image quality begins with the lens

A CCD sensor with 2048 x 3076 pixels on a 24 x 36 mm area has a pixel density of approximately 85 pixels/mm, which corresponds to a resolution of approximately 43 pairs of lines. A pair of lines consists of a bright line and a dark line of the same width. This half pixel frequency, called Nyquest frequency, has to be resolved by a lens in order not to waste the resolution of the CCD. This is the only way of ensuring that a sufficient number of line pairs strikes the chip so that good sharpness is achieved even with a slight displacement of the lines striking the individual pixels. Unlike microscan systems available in the past, the Macroscan does not strain the optical resolving power of digital lenses. Instead, it makes ideal use of it, thus producing optimal brilliance in the photographs. The Sinar Macroscan increases the resolution, not by reducing the size of the pixels; instead it achieves an effectively greater resolution by very precisely shifting the entire sensor surface. This leads to optimal results with Sinaron Digital Lenses.

The Free Choice of Light

Line scanners and some microscan systems require constant light sources. In addition, the subject has to remain absolutely static. With the Sinar Macroscan, any light source that is appropriate for a particular subject can be used, such as flash, daylight, etc. This also permits very small apertures, which could not be used with line scanners because of limited exposure times or insufficient light. The Sinar Macroscan is significantly faster than a scanner, the subject is not strained by continuous light (fine and museum art) and it is illuminated more uniformly. With the Macroscan, individual partial images can be photographed in the 4-shot mode for stills and also in the 1-shot mode. Thanks to the 1-shot mode, even live subjects can be incorporated into a Macroscan image.

The Perfect Picture, Immediately

The Sinar Macroscan Adapter shifts the digital back by means of a motor, without vibration and with pixel accuracy. A finished image becomes available immediately, with a resolution of more than 18 million pixels and without subsequent manipulation. A pixel-accurate assembly of the partial images is assured by the Stitching Software, which can also be operated in the batch mode. Automatic brightness compensation among the partial exposures leads to an absolutely uniform illumination. The photographs are composed on a ground glass screen, and the live image with its electronic magnifier is used for perfect, pixel-accurate focusing.

Fully Automatic

The Sinar Macroscan Adapter can be used directly on the digital back, without any changes. For this purpose, computer control is used to shift the Sinarback into four positions. Three formats can be pre-selected: vertical (2x the sensor height), horizontal (2x the sensor width), and an area fully 4x the area of the sensor, minus the respective necessary overlaps. For greater detail and greater color fidelity, it is advantageous to make the photographs in the 4-shot mode. The resulting sixteen "exposures" are assembled by the software with pixel accuracy. This creates an image area of up to four times the size of the sensor area. A file size of up to 100 MB is achieved without interpolation (depending on the size of the sensor).

Sinar Bron Imaging is the exclusive distributor in the U.S. for the Sinar(r) line of professional view camera systems, including the Sinarback and Sinarcam 2 digital camera system, the Broncolor line of power packs, HMI's and accessories, the Foba(r) line of studio stands, rail systems and accessories and the Leaf Volare(tm), Leaf Cantare(tm), DCBII Live(tm) and CatchLight(tm) digital imaging systems from Scitex(tm) Corporation Ltd.

For more information, visit http://www.sinarcameras.com or call (908)754-5800 ext. 213.
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Publication:Imaging Update
Date:Oct 1, 2000
Words:897
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