8mm film has the equivalent of 800 to 1000 digital horizontal lines of resolution. The number of actual lines of resolution is dependant on the camera, lens, lighting and focus when it was recorded. On average, the 8mm film we see is around 700 to 900 lines.
Today, there are 480 (standard definition) and 1080 (high definition) line 8mm film to DVD transfer processes. Most companies use a 480 line video capture or frame by frame 8mm film to DVD system. This will get about 60% (480/800) of the details on the 8mm film.
The only way to get 100% of the details from a 8mm to DVD transfer is to capture or scan the film at 1080 lines. This is the only way to archive the 8mm film in a digital format.
So, if you are interested in truly archiving your 8mm film to DVD, choose a 8mm film transfer using a 1080 line 8mm film scanning process.