taking huge numbers of exposures was nil, while each 10 × 12.5 cm (4 × 5″) photograph cost over US$3. Both the scanned and the 39-megapixel images were noticeably better than images with a 22-megapixel back. An actual flatbed image scanner can be used as a camera back if fast operation and short exposures are not required. Stitching Another alternative is to take multiple smaller pictures and then stitch them together via image stitching. In this way very high-resolution images can be produced from a low-resolution sensor. This can be done with a smaller digital camera, such as a DSLR, and stitching sliding back adapters are available for large-format cameras. The process can be lengthy, and is unsuited for moving subjects. There are also non-sliding options for stitching images together in various patterns using micro stepping of the image sensor and taking advantage of the gap between active pixel areas on the digital sensors. This stitching method is used to also give overlaid red green and blue pixel recording as well as increased resolution. Technical features Typical backs By 2006 CCD matrix camera backs of 39 megapixels were available. using the Kodak CCD and 33-megapixel Dalsa CCD in the Sinar 75 and in the Leaf Aptus 75 (6726 × 5040 pixels, with 7.2-micrometre-wide pixels). By 2008 several camera manufactures were developing larger camera backs based on the Kodak 50-megapixel CCD. Scanning backs are a narrower niche, used only for the highest-quality images with large-format cameras. Sinar continued their development of the step and repeat system of extending the CCD capabilities (macroscanning) with the arTec camera which creates a panoramic image with stitching technology. In addition to increased resolution, larger image sensors are becoming available; Kodak has produced a 50-megapixel CCD which is 49.1 × 36.85 mm (1.93 × 1.45″), approaching the size of a frame of 120 film (60 × 45 mm) and is twice the area of a 35 mm frame (36 × 24 mm), and over seventy times the area of the typical 1/1.8″ (7.2 × 5.3 mm) sensor size used in point-and-shoot pocket cameras. Large-area CCDs are used by the several manufacturers of high-resolution photographic equipment. Other recent innovations are built-in LCD viewing screens and the inclusion of all processing within the camera back, with output in open DNG file format, as in the Sinar 65. The Pentacon Scan 7000 scanner camera was introduced at the photokina