Home Theater Calculator: Viewing Distance, Screen Size

[SKCERN]

After extensive search I found the following site, which provides a work sheet for everything about home theater set up including seating distances and throw distance for the commonly used screen aspect ratios( 16;9, 2.35:1 and so on.) it is a very comprehensive work sheet.

I learned from this site that by using a anamorphic lens, the Throw distance shortens for any given super-wide screen size .

http://www.carltonbale.com/home-theater/home-theater-calculator/

 

[smooth criminal]

Απάντηση: Home Theater Calculator: Viewing Distance, Screen Size

Πολυ καλο εργαλειο!

Ομως λεει το εξης παραδοξο(το ειχαμε συζητησει παλαιοτερα): σε 100" 16:9 οθονη, το THX Longest Recommended viewing distance ειναι 3,41μ. Ενω σε 100" 2.40 οθονη, το THX Longest Recommended viewing distance ειναι 3,61μ!

Πως γινεται αυτο ας μας εξηγησει καποιος!:126:

Επισης αναφερει το παρακατω αλλα δεν ξερω κατα ποσο ισχυει

5. Shortest Recommended Viewing Distance based on Field-of-View being too wide: This distance is based on the peripheral vision field-of-view of the human eye. The average field-of-view width for the human eye is 140 degrees. The rule is that if the viewer sits any closer than this distance to the screen and looks at one side of the screen, they will not be able to see the other side of the screen with their peripheral vision. This equates to a 70-degree field-of-view when the person is looking at the center of the screen.

Και αφησα το καλυτερο για το τελος

5. SMPTE Max Screen Height: The vertical viewing angle is measured at seated eye height from the front row center seat to the top of the tallest projected image. SMPTE notes that for most viewers physical discomfort begins when this angle exceeds 35 degrees. This is not typically a problem for home theater applications.

:127:

 

[dimitris__]

Απάντηση: Home Theater Calculator: Viewing Distance, Screen Size

To THX site λέει απλά ότι διαιρείς τη διαγώνιο με το 0,84. Δηλαδή για 300cm διαγώνιο (περίπου 120'') η ιδανική απόσταση είναι 3,5 περίπου m.