When we scan slide images we use a high resolution, typically 3200 dpi. This means that the images can be printed clearly up to A4 size. As scanning equipment, and software, improves the goal posts change. We recently scanned slides for a mountaineering group. They had had their images scanned about 12 years ago by a leading company to my surprise the images were 300 dpi and they lost quality quickly as they were enlarged.
My point is that we should scan our images whenever we can and accept the best quality available. If we delay we may get higher resolution but our pictures may have degraded with colour loss or fungal contamination and may actually be lost forever.
For our mountaineering friends we provided a high resolution, up to date product from well preserved slides. Our customers need to be aware that they can get an excellent product now and preserve those memories before the slides deteriorate and are lost forever.
David J Sack www.saturn-films.co.uk
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