Geoff Baxter wrote:Pin registration went out many years ago as being an old fashion concept when line scan telecine chains were coming into favour, as the sensors were simply a line of photo-receptors, not an area array. Of course line arrays are now very definitely old-hat, so pin registration may have a resurgence.
Among modern scanners, the Lasergraphics Director is Pin-registered, as are the Arriscan, and some of the DCS Xena machines. All use area sensors. An option on the Director, something we have on our Lasergraphics ScanStation, is a digital pin registration that lines up the sprocket holes to a fixed X/Y location on the output file, before writing the file to disk. This has become more popular, but different manufacturers do it differently. The steadiness of our ScanStation is remarkable, even with extremely shrunken film.
The Northlight and older Imagica scanners use line arrays. Both of those are pin-registered, I believe. The Scanity doesn't have an intermittent transport, so it does pin registration electronically, but it's not as good as that in the ScanStation or Director (the ScanStation is continuous motion, the Director is intermittent).
Physical registration pins are just fine if the film is newer. The Cintel scanner has sprocket wheels, so you're not likely to be putting shrunken archival film in it anyway - you'd damage old film before it ever hit the registration pin, if there is one. 2% shrinkage is a fair bit and that's what the scanner can supposedly handle, but our scanner can take film shrunken over 5%, because it's sprocketless.
If the gate is swappable, then the question is, where is it stored? It used to be considered good practice to store it in the same cabinet as the rest of the transport to shield it from dust.
Our scanner has removable gates for different formats, and we store them in a drawer in a cabinet near the scanner, where they're kept free from dust. It doesn't take more than a second or two to blast them with some canned air before installing.
-perry