Recent content by SCHWARZZEIT

As a provider for high-end film digitization the performance of my HXY scanner is a unique selling point of my service. I hope you understand that I’m not going to disclose details on the exact components I’ve used to build it. But I can share some broader information. It’s a very large rig...

Your numbers match my experience. In most cases 10,000 ppi with high sampling efficiency is enough to capture the full image content of color films. However, I’ve seen negatives where a 14,000 ppi scan could resolve additional details, typically high contrast features. Then there is Adox CMS 20...

The Phase One reprographic system for cultural heritage digitization is based around the iXG and iXH cameras with 101 and 151 MP sensors respectively. It’s designed for mass digitization with full control of the camera and the column of the copy stand through the Capture One CH software. You are...

The extinction resolution depends on the level of input contrast. The film MTF is only a description on how much of the input contrast is film recorded by the film. If we pick up your TMY MTF for a theoretical exercise and you start with 1000:1 contrast and the film has an MTF of 0.11%...

For clarification: In their Professional Film Guide Fujifilm gives a pretty detailed description on how both MTF and the two resolving power values are measured: https://asset.fujifilm.com/www/us/files/2020-03/3ab271f46f8d71c7e4c91bcedb7de050/ProfessionalFilmDataGuide.pdf See pages 123-126 and...

Issue 17: on films that Zeiss used for lens resolution tests Issue 19: summary of Zeiss resolution tests for several films Issue 24: reporting the 400 lp/mm record shot with the 25mm Biogon ZM on SPUR Orthopan UR (same emulsion as Adox CMS 20) If you cannot find them I can send you 17 and 19 as...

When I suggested the downsizing/upsizing method to check at which point real image detail is lost and then draw conclusions on the effective resolution of the original file I didn’t mean it to be scientific. I reevaluated the method with a digitized negative that included a resolution test chart...

I designed and built the HXY Scanner around my Phase One IQ4 digital back and high-resolution industrial optics. The HXY naming comes from the H-shaped design of the copy stand where the camera is mounted on a horizontal rail between two columns and the XY capture stage that allows the film...

I would take a ranking based on these categories with a grain of salt as there are too many variables. For example, the high-end flatbed scanners such as the Creo/Scitex/Kodak Eversmart or Screen Cezanne lines are very capable film scanners and definitely not the worst method of digitization...

That would be me. Thanks for the kind words. As I have mentioned in my previous post, I have developed a high-end camera-based film digitization system (HXY Scanner) that outresolves any drum scanner and is also superior in dynamic range (high density rendition and shadow recovery) and color...

Downsizing has nothing to do with the Rayleigh criterion. While the Shannon-Nyquist sampling theorem also applies to downsizing images, it does not necessarily suggest a margin for effective resolution. When I tested Photoshop’s Preserve Details resampling algorithm by downsizing USAF 1951 HiRes...

A simple test to check the effective level of detail of an image file is to downsize it (e.g. in Photoshop) to see at which resolution the image loses image content details. You can download that crop, load it into Photoshop, set the resolution to 5400 ppi (without resizing) and then resize to...