----- HDTV Magazine Tips List -----
Robert,
Although I do not have the time to cover the subject fully, which might take
me a similar effort of doing the articles anyway, I do not want to leave
your comment as the only side of the story and discourage some readers about
the concept of CinemaScope on a 16:9 world of HDTV.
Your points are valid for 16:9 TV viewers with limited space for wider
screens, but not valid for 2.35:1 movie viewers that want the local theater
experience at home (not watch TV), a format very common for Hollywood
movies.
If someone views widescreen movies occasionally and watches TV most of the
time then CinemaScope might not be for that person, although there are a lot
of people that watch 1.78:1 sports on 2.35:1 AR screens to increase the
experience of a good football game, and I even use the expansion for some
nature programs, I do and is spectacular.
A masking system is always a good idea on either screen format, the masking
accents the quality of the image, not just frames it.
One point that is not mentioned on your email is that a 2.35:1 movie has
about 30+% of unused resolution of the stored media (wasted space on the
disc) because is occupied by the top/bottom black bars.
If one is to display that image on a 16:9 screen 30+% of the pixels of the
projector chip and a similar size of the screen area would be wasted as well
(and the image would be smaller than a movie lover might be looking for to
satisfy his/her movie experience). Again, this is a movie watching purpose,
not using a large HT for just TV.
In a CinemaScope system the scaler would stretch the 2.35:1 movie vertically
(leaving the top/bottom black bars out) to use all the vertical pixels of
the projector chip (that otherwise would be used for top/bottom black bars).
That image if projected as is it would look tall and skinny.
Then the anamorphic lens in front of the projector lens would take that
vertically stretched image and stretch it now horizontally (left/right) to
restore the correct geometry of the movie imparted by the director, and will
use the entire width of the 2.35:1 screen area.
This electronic and optical approach uses the full resolution of the
projector (1920x1080, rather than 30+% less of the 1080, equivalent to 30+%
less than the 2 million pixels available in the chip).
Local theaters use anamorphic lenses for decades to create a similar effect
from celluloid frames containing a vertically stretched image shot by film
cameras that have anamorphic lenses in the front, so they can use every bit
of the celluloid, similar concept on projector chips but done electronically
on the first part. This is a simplified comparison.
The new anamorphic lenses and motorized system that Optoma is using (and I
use) for CES and CEDIA for screens as wide as 170" (that is 14 feet
diagonal), are below:
http://www.panamorph.com/index.html
Runco and the others are doing something similar with their own brands, some
use Schneider lens (like Faroudja).
Some other brands are not as good and produce optical aberrations
(especially at the side corners) that give sometimes a negative feeling to
the concept, and an opportunity to expensive solutions like Runco and
Stewart Cinecurve to sell the idea that if the screen is not curve it would
be horrible.
Sorry I cannot go into more details now due to lack of time.
Best Regards,
Rodolfo La Maestra
-----Original Message-----
From: HDTV Magazine On Behalf Of Dr
Robert A Fowkes
Sent: Sunday, January 14, 2007 6:29 AM
To: HDTV Magazine
Subject: Re: Curiosity
----- HDTV Magazine Tips List -----
At 05:41 PM 1/13/2007 -0500, you wrote:
>I was wondering where that came from. The Runco/Kaliedescape anamorphic
lens
>system I saw had a FLAT screen.
Same here. And I also saw an Optima (I believe it was the HD81) at
CEDIA 2006 which had a similar sliding lens attachment projected onto
a flat screen. My major problem with 2.35:1 screens is that it
forces you to view 16:9 material with side bars instead of the other
way around (2.35:1 content on a 16:9 screen with top/bottom
bars)unless you use masks, which is another form of black bars. In a
room with somewhat limited side to side space you have to sacrifice
some vertical height for the 16:9 images if your screen is
2.35:1. My 110" (16:9) Stewart Studiotek 130 screen works fine in
my space. If I went to a 2.35:1 screen I would have to end up with a
substantially smaller image when viewing 16:9 source material (all
HDTV, many movies, etc.). And, of course, 4:3 content would be even
smaller.
The concept of watching 2.35:1 movies on a 2.35:1 screen is based on
using an anamorphic lens to reproduce anamorphically shot material in
order to extract all the information from the source rather than
electronically adjusting the source material. While I can appreciate
that, the marketing of such devices and screens seems to focus on,
"Why watch movies with black bars on the top and bottom of your
screen? Use a screen geometry that equals the picture
geometry." Black bars never bothered me (especially with my DLP FP
which, to my eyes, makes them disappear into the background on 2.35:1
material. If I end up with the Optima HD81 I might look into the
moveable anamorphic lens option (since I understand the theory behind
it) but I'm not about to change my screen geometry for size reasons
pointed out in the first paragraph of this response.
-- RAF
To unsubscribe please click: [email protected]
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day) send an email to:
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[email protected]
Robert,
Although I do not have the time to cover the subject fully, which might take
me a similar effort of doing the articles anyway, I do not want to leave
your comment as the only side of the story and discourage some readers about
the concept of CinemaScope on a 16:9 world of HDTV.
Your points are valid for 16:9 TV viewers with limited space for wider
screens, but not valid for 2.35:1 movie viewers that want the local theater
experience at home (not watch TV), a format very common for Hollywood
movies.
If someone views widescreen movies occasionally and watches TV most of the
time then CinemaScope might not be for that person, although there are a lot
of people that watch 1.78:1 sports on 2.35:1 AR screens to increase the
experience of a good football game, and I even use the expansion for some
nature programs, I do and is spectacular.
A masking system is always a good idea on either screen format, the masking
accents the quality of the image, not just frames it.
One point that is not mentioned on your email is that a 2.35:1 movie has
about 30+% of unused resolution of the stored media (wasted space on the
disc) because is occupied by the top/bottom black bars.
If one is to display that image on a 16:9 screen 30+% of the pixels of the
projector chip and a similar size of the screen area would be wasted as well
(and the image would be smaller than a movie lover might be looking for to
satisfy his/her movie experience). Again, this is a movie watching purpose,
not using a large HT for just TV.
In a CinemaScope system the scaler would stretch the 2.35:1 movie vertically
(leaving the top/bottom black bars out) to use all the vertical pixels of
the projector chip (that otherwise would be used for top/bottom black bars).
That image if projected as is it would look tall and skinny.
Then the anamorphic lens in front of the projector lens would take that
vertically stretched image and stretch it now horizontally (left/right) to
restore the correct geometry of the movie imparted by the director, and will
use the entire width of the 2.35:1 screen area.
This electronic and optical approach uses the full resolution of the
projector (1920x1080, rather than 30+% less of the 1080, equivalent to 30+%
less than the 2 million pixels available in the chip).
Local theaters use anamorphic lenses for decades to create a similar effect
from celluloid frames containing a vertically stretched image shot by film
cameras that have anamorphic lenses in the front, so they can use every bit
of the celluloid, similar concept on projector chips but done electronically
on the first part. This is a simplified comparison.
The new anamorphic lenses and motorized system that Optoma is using (and I
use) for CES and CEDIA for screens as wide as 170" (that is 14 feet
diagonal), are below:
http://www.panamorph.com/index.html
Runco and the others are doing something similar with their own brands, some
use Schneider lens (like Faroudja).
Some other brands are not as good and produce optical aberrations
(especially at the side corners) that give sometimes a negative feeling to
the concept, and an opportunity to expensive solutions like Runco and
Stewart Cinecurve to sell the idea that if the screen is not curve it would
be horrible.
Sorry I cannot go into more details now due to lack of time.
Best Regards,
Rodolfo La Maestra
-----Original Message-----
From: HDTV Magazine On Behalf Of Dr
Robert A Fowkes
Sent: Sunday, January 14, 2007 6:29 AM
To: HDTV Magazine
Subject: Re: Curiosity
----- HDTV Magazine Tips List -----
At 05:41 PM 1/13/2007 -0500, you wrote:
>I was wondering where that came from. The Runco/Kaliedescape anamorphic
lens
>system I saw had a FLAT screen.
Same here. And I also saw an Optima (I believe it was the HD81) at
CEDIA 2006 which had a similar sliding lens attachment projected onto
a flat screen. My major problem with 2.35:1 screens is that it
forces you to view 16:9 material with side bars instead of the other
way around (2.35:1 content on a 16:9 screen with top/bottom
bars)unless you use masks, which is another form of black bars. In a
room with somewhat limited side to side space you have to sacrifice
some vertical height for the 16:9 images if your screen is
2.35:1. My 110" (16:9) Stewart Studiotek 130 screen works fine in
my space. If I went to a 2.35:1 screen I would have to end up with a
substantially smaller image when viewing 16:9 source material (all
HDTV, many movies, etc.). And, of course, 4:3 content would be even
smaller.
The concept of watching 2.35:1 movies on a 2.35:1 screen is based on
using an anamorphic lens to reproduce anamorphically shot material in
order to extract all the information from the source rather than
electronically adjusting the source material. While I can appreciate
that, the marketing of such devices and screens seems to focus on,
"Why watch movies with black bars on the top and bottom of your
screen? Use a screen geometry that equals the picture
geometry." Black bars never bothered me (especially with my DLP FP
which, to my eyes, makes them disappear into the background on 2.35:1
material. If I end up with the Optima HD81 I might look into the
moveable anamorphic lens option (since I understand the theory behind
it) but I'm not about to change my screen geometry for size reasons
pointed out in the first paragraph of this response.
-- RAF
To unsubscribe please click: [email protected]
To receive the digest mode (one email a day made from all posted that same
day) send an email to:
[email protected]
To unsubscribe please click: [email protected]
To receive the digest mode (one email a day made from all posted that same day) send an email to:
[email protected]