Large gauge – A 70 mm film frame is not only twice as wide as a standard frame but also has greater height. Shooting and projecting a film in 70 mm therefore gives more than four times the image area of non-anamorphic 35 mm film providing a major improvement in image quality. Few major dramatic narrative films have been filmed entirely on this format since the 1970s; the three most recent are Kenneth Branagh's "Hamlet", Paul Thomas Anderson's "The Master" and Quentin Tarantino's "The Hateful Eight". For many years, large budget pictures shot anamorphically used reserve stocks of 70 mm film for SFX shots involving CGI or blue-screen compositing as the anamorphic format creates problems with said effects. It has also been used to sometimes strike 70 mm blow-up prints for "roadshow" tours in select cities from the 35 mm camera negative in order to capitalize on the extra sound channels provided. The introduction of digital sound systems and diminishing number of installed 70 mm projectors has made a 70 mm release largely obsolete. However, blowups from 35 mm formats to IMAX have been used for a limited number of blockbuster films.