Aspect ratio [www.masterclass.com/articles/guide-to-aspect-ratios]

Angel Films and Angel Rentals [www.angelfilms.com]

Oy Filmfotograferna Ab [www.suomenfilmfotograferna.fi]

Oy Filmfotograferna Ab [www.suomenfilmfotograferna.fi/Tiffen/tiffen.html]
Tiffen-filters.

Warner Bros [studiooperations.warnerbros.com]
Studios Facilities.

DVD Demystified [www.dvddemystified.com/dvdfaq.html]

Videography Basics. Online Textbook. [www.personal.kent.edu/~lhanson/index.html]

Juha Vanhanen: [Juha Vanhanen - Media Teacher | LinkedIn]
DHEViVaFPP - Digital High-End Visualization in Video and Film Production Process