About thirty-five to forty years ago, 35mm slides were quite popular. Families documented their vacations and special occasions with series of slides, businesses used slide shows for important presentations, and students learned about faraway places and science from slide shows. Each slide was placed, in order and in the correct orientation, into the slide carousel, and the show began.

Image technology has come a long way since the 60's and 70's. PowerPoint presentations, digital cameras, and photographs on CD's and DVD's are used for displaying pictures and presentations. Many people have boxes and cases full of old 35mm slides that sit gathering dust because viewing the slides is too cumbersome or the slide projector is broken. Fortunately, slides can now be converted to a digital format onto CD's and DVD's for easy storage and viewing with slide scanning.

You can use a flatbed scanner or a film scanner to scan your slides. Film scanners can range in price from $300 to over $1,000, but they produce a higher quality reproduction. Some of the scanner features you need to consider before making a purchase are resolution, DPI, PPI, dynamic range, and bit depth.

The resolution of a scanned image is the measurement of how sharp, or clear, the scanned image is. The DPI, or dots per inch, is the measurement of the number of image dots a printer is capable of printing into 2.54cm (one linear inch) of space. A higher DPI typically results in a higher resolution. Pixel, a combination of the words ?picture? and ?element,? is a term that refers to the smallest unit of an image. This is typically a color dot. The number of pixels a scanner supports (megapixels) and the size of the image produced determine the PPI, or pixels per inch. As the size of an image increases, the PPI decreases. Scanners with higher megapixels produce images with higher resolution. Dynamic range refers to the capability of distinguishing levels of brightness in an image. A low dynamic range results in a blurry, undefined image, and a high dynamic range produces a sharp, crisp image. Bit depth, or color depth, is the measurement of how many bits, or single units of information, are used to create each pixel in a digital image. Higher bit depths result in brighter and deeper image colors.

There are some drawbacks to do-it-yourself slide scanning. As mentioned previously, the cost of a quality scanner may be prohibitive. You may also end up with a scanner that is difficult to operate or does not perform as you expected. Common problems of scanning slides at home or at your business are damage from fingerprints, choosing the appropriate settings on the scanner, and difficulty producing pictures without scratches and other unsightly marks. Slide scanning can also be a very time-consuming.

For an easier approach to scanning slides, try a professional photography business that offers this service. Professional slide scanning services use top of the line scanners, and the scanned images are clear and blemish-free. You won't need to bother with purchasing special equipment to scan your slides, and reputable scanning services guarantee their work. Your slide scanning project will be completed in no time!