This article is from the Dune FAQ, by Alan Schwartz with numerous contributions by others.
Universal/MCA has re-released the theatrical version of Dune on NTSC and
PAL VHS in both widescreen and Pan & Scan format. The widescreen PAL
video has been deleted.
The theatrical edition has also been released on laserdisc and DVD (R1
and R2). All these are in (non-anamorphic) widescreen, and of fairly
high technical standard. They feature no particularly exciting extras.
The Alan Smithee edition is available on R2 DVD, both in PAL and in a
two-disc Japanese NTSC set. Its format is Pan & Scan, because it was
originally edited for television.
The Japanese import laserdisc is out of print.
 
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