While the master was 4K, the actual video file or disc is delivered in 1080p resolution (Standard Blu-ray quality). This is often done to provide the "cleanest" possible 1080p image by downscaling the 4K source, reducing digital artifacts and noise. Key Visual Differences
The release you are referring to is a high-quality version of the 1980 horror classic that has been digitally enhanced for modern displays. Technical Breakdown Friday the 13th (1980) Unrated RM4K (1080p BluR...
This indicates the movie was sourced from a 4K scan of the original camera negative . This process captures significantly more detail, better color accuracy, and improved contrast compared to older high-definition masters. While the master was 4K, the actual video