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Author Topic: Field of Vision
Dave Bird
Jedi Master Film Handler

Posts: 777
From: Perth, Ontario, Canada
Registered: Jun 2000


 - posted 04-03-2002 09:36 PM      Profile for Dave Bird   Author's Homepage   Email Dave Bird   Send New Private Message       Edit/Delete Post 
We have spoken before about proper setback of seating area (from screen) as being at least two screen heights. Two questions: Is that 2 screen heights from the floor, or bottom of screen? Next, how far back before our screen becomes too small? Anyone know rule of thumb?

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John Anastasio
Master Film Handler

Posts: 325
From: Trenton, NJ, USA
Registered: Sep 2000


 - posted 04-03-2002 10:14 PM      Profile for John Anastasio   Author's Homepage   Email John Anastasio   Send New Private Message       Edit/Delete Post 
AT LEAST two screen heights is a bit far back. The rule of thumb I learned was 1.5 screen heights back for optimum viewing. That's from the vertical axis of the screen. It's where I try to sit when I view a film and it produces a very comfortabe viewing angle similar to a normal line of sight. It's only too far back when you can't get anyone to sit there!

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Dave Williams
Wet nipple scene

Posts: 1836
From: Salt Lake City, UT, USA
Registered: Jan 2000


 - posted 04-03-2002 11:23 PM      Profile for Dave Williams   Author's Homepage   Email Dave Williams   Send New Private Message       Edit/Delete Post 
I always try to sit where my field of vision is engulfed by the screen. My problem is that I have a 215 degree peripheral vision, so that really makes it hard in many theaters. In most theaters I end up distracted by hair moving from the guy two seats next to me.

Dave

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John Pytlak
Film God

Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000


 - posted 04-04-2002 07:13 AM      Profile for John Pytlak   Author's Homepage   Email John Pytlak   Send New Private Message       Edit/Delete Post 
Standard SMPTE 196M specifies:

"Review room viewing conditions

All observers in a review room shall be located within a standard observing area which shall be:

a) within the limits of a 15-degree angle on either side of a perpendicular to the center of the screen, in both the horizontal and vertical planes; and

b) at a distance of 3 picture heights +/- 1 picture height from the screen."

Of course in a theatre, where you sit is a matter of personal preference. I personally prefer to sit rather close, usually on the centerline of the auditorium at about 2 screen heights. "Film Done Right" easily supports even closer viewing distances for 35mm prints, and large format 70mm films allow an "immersive" experience with prime seating often closer than 1 screen height.

------------------
John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Research Labs, Building 69, Room 7525A
Rochester, New York, 14650-1922 USA
Tel: +1 585 477 5325 Cell: +1 585 781 4036 Fax: +1 585 722 7243
E-Mail: john.pytlak@kodak.com
Web site: http://www.kodak.com/go/motion


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Frank Angel
Film God

Posts: 5305
From: Brooklyn NY USA
Registered: Dec 1999


 - posted 04-04-2002 09:02 AM      Profile for Frank Angel   Author's Homepage   Email Frank Angel   Send New Private Message       Edit/Delete Post 
Like John and Dave, I like to sit where the sides of the screen go out nearly to the edge of my vision -- what suprises me is how many people prefer to sit MUCH further back than that. I'll walk into the theatre ahead of 4 or 5 of my friends and walk down the isle to pick a location, only to look back to find that there is no one left behind me....they are all standing at isles much further back, trying to get me to go back there with them. Fat chance. If I wanted to stare at a screen the size of a 35in TV set, I would have stayed home. And of course in many multiplexes, you could sit in the very first row (and look up at a 45 degree angle) and STILL see a screen the size of a TV set.

I have convinced a number of my friends the advantage of picking a location that immerses you in the visual illusion, but some simply refuse to sit that close. I am thus resigned not to sit with most of my friends when we go to the movies. But then there are very few theatres here in Brooklyn worthy of a $10 admission price to begin with. Sadly, most are not places in which you would want to watch a movie even if they let you in for free. Here in Brooklyn, a city of over 3 million people, they mostly follow a variation of that adage that we use here -- "Film done to make you puke."

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Michael Brown
Phenomenal Film Handler

Posts: 1522
From: Bradford, England
Registered: May 2001


 - posted 04-04-2002 09:56 AM      Profile for Michael Brown   Email Michael Brown   Send New Private Message       Edit/Delete Post 
I'm also a close sitter.


In the smaller screens (all stadium) at my local i tend to sit on the 2nd or 3rd row. Just off center. Often in an empty auditorium i see people head to the back row. Or even worst, the extreme left or right of the back row seems a popular choice.


In the larger screens that have 3 or 4 rows of sloped seating at the front before the stadium seating, i sit on the 1st row of stadium seating.

If there are a lot of rows of sloped seating before the stadim seating begins, i sit on one of the back few rows of the sloped seating. These are my least preferable auditoria. I find that even the 1st row of stadium seating is too far from the screen. I find that the sloped seating is too vertically low down but i sit their anyway.

On a couple of occasions i have found myself alone in an auditorium. I usually have a walk about. I noticed that the screen volume level can change noticably if you sit far back. Would sitting on the back row also affect how you would hear the surrounds?

I think that some people dont understand that "the closer you sit the bigger the screen appears to be". They sit on the back row and complain that the screen is small in this auditorium


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David Stambaugh
Film God

Posts: 4021
From: Eugene, Oregon
Registered: Jan 2002


 - posted 04-04-2002 10:20 AM      Profile for David Stambaugh   Author's Homepage   Email David Stambaugh   Send New Private Message       Edit/Delete Post 
In a theater with common-width screens (most of the Cinemark 17 rooms here, all with stadium seating), I tend to sit closer for scope than I do for flat. In flat configuration, the added image height seems a little problematic to me (and of course the width is always the same). For scope I like to sit about 1/3 of the way back, no more than 1/2 if possible. For flat it's 1/2 to 2/3 of the way back. The screens here range from about 35 to 40 feet in width.

For common-height screens (I think all of Regal Cinema World 8 rooms here are common-height, all with conventional seating), in the 2 flagship auditoriums I tend to sit no more than 1/3 from the front for scope, and closer for flat. The screens in these rooms are slightly smallish. Scope is about 34' wide, flat proportionately less. Their smaller rooms are a different story, since most of them have large screens and short-throws. I tend to sit near the back in them regardless of format.

If I'm with other people who absolutely won't sit as close as I like to, I defer to their seating preference.



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David Favel
Jedi Master Film Handler

Posts: 764
From: Ashburton, New Zealand
Registered: Feb 2002


 - posted 04-04-2002 05:18 PM      Profile for David Favel   Email David Favel   Send New Private Message       Edit/Delete Post 
The rule of thumb is, if you are very cool sit as far towards the back as possible.
This applies to school, buses etc.
My son prefers 1 screen back as he likes to know he is at the movies.
I prefer 2.5
My daughter is so much cooler than both of us so she is way at the back.

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Dave Bird
Jedi Master Film Handler

Posts: 777
From: Perth, Ontario, Canada
Registered: Jun 2000


 - posted 04-04-2002 05:39 PM      Profile for Dave Bird   Author's Homepage   Email Dave Bird   Send New Private Message       Edit/Delete Post 
As mentioned above, there's a sweet spot in every theatre (or outdoor for that matter) where the image comfortably fills your field of vision. I wonder how much of that image is "lost" for every foot you go back. Have the theatre designers ever come up with a magic formula for this? Doesn't really matter, I was curious about it for some reason.

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Dave Williams
Wet nipple scene

Posts: 1836
From: Salt Lake City, UT, USA
Registered: Jan 2000


 - posted 04-04-2002 08:01 PM      Profile for Dave Williams   Author's Homepage   Email Dave Williams   Send New Private Message       Edit/Delete Post 
What I do is sit directly in the middle, looking at the placement of the surrounds in relation to the screen placement, making sure I get the sweet spot for the sound.

Dave

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