These are nowhere near the dirtiest I’ve seen, but this is to demonstrate that even in a clean shop, over time, a haze forms on most of the optical components, especially those that face upward, like the photo-multipliers, the color filters, and the neutral density filters. It’s important to get your scanner serviced by a Fachmann (someone who knows what they are doing)! In this photo, one PMT has been cleaned.
A prominent client of ours called us with an error ‘unable to find white balance’ after a film counterweight had flown off the drum of their Heidelberg 8200. We went through our usual remote troubleshooting steps, and finally had to resort to a service call. After a little while on site, Brian located a piece of negative which had banked off the back of the scanner chassis and settled on top of the intake lens to the transparency fiber optics – putting a dim warm glow on all the scanners light! The film piece was sized just perfectly to fit into the detent over the lens. No wonder it couldn’t white balance. After a thorough cleaning and recalibrating all optical functions, they were back in business. In this case, the flyaway was due to a faulty batch of tape, but it just goes to show you – these drums spin FAST (up to 2000RPM) ! Secure your negs 🙂