DSLR Movie capability

Martin wrote:

snip for brevity
Think "out of the box". You are correct that, with the mirror locked
and the sensor continuously illuminated, you would not be able to see
the scene IN THE EYE-LEVEL VIEWFINDER. But there is no inherent
limitation that would prevent the sensor image from being real-time-
previewed on the back-panel LCD. No one is doing it (yet), but
there's no big technological barrier. I'd say it's just a matter of
time before someone will do it, and it will be a popular feature that
doesn't necessarily add cost or compromise DSLR perfomance.

Martin

The two latest Olympus cameras have a live-preview from the sensor mode
(mode B live-preview?).
So it Oly wanted to, they could turn it into (with the next model) a
do-everything DSLR camera that shoots movies as well.
I don't know enough of the technical details of the sensor/camera to
answer as to why Olympus didn't.

SayWhat wrote:

On Sat, 26 May 2007 03:09:16 +1000, dj_nme wrote:


Martin wrote:

snip for brevity

Think "out of the box". You are correct that, with the mirror locked
and the sensor continuously illuminated, you would not be able to see
the scene IN THE EYE-LEVEL VIEWFINDER. But there is no inherent
limitation that would prevent the sensor image from being real-time-
previewed on the back-panel LCD. No one is doing it (yet), but
there's no big technological barrier. I'd say it's just a matter of
time before someone will do it, and it will be a popular feature that
doesn't necessarily add cost or compromise DSLR perfomance.

Martin

The two latest Olympus cameras have a live-preview from the sensor mode
(mode B live-preview?).
So it Oly wanted to, they could turn it into (with the next model) a
do-everything DSLR camera that shoots movies as well.
I don't know enough of the technical details of the sensor/camera to
answer as to why Olympus didn't.


Why bother to try to make a dSLR as good as a good P&S camera? Dump that
over-priced, low-life-span mechanical shutter, image-shaking, mirror-slapping,
noise-making, last century SLR technology and get a P&S camera that already does
everything and more than you'll ever need.

I'm not the DSLR camera manufacturer that decided that live-view on a
DSLR camer is a good idea.
If you're going to go part-way (mode b live-view), you may as well go
"the whole hog" and put a movie mode in there as well.

"SayWhat" wrote in message
...
....
Why bother to try to make a dSLR as good as a good P&S camera? Dump that
over-priced, low-life-span mechanical shutter, image-shaking,
mirror-slapping,
noise-making, last century SLR technology and get a P&S camera that
already does
everything and more than you'll ever need.

One word: glass.

People have too much invested in lenses, and their manufacture, for us to
walk away from the SLR just yet. The subject line is right, though.
Eventually it will happen, and we'll have a new generation of lenses and
cameras that really take advantage of digital's capabilities.
--
Mike Russell
www.curvemeister.com

dj_nme wrote:
Martin wrote:

snip for brevity
Think "out of the box". You are correct that, with the mirror locked
and the sensor continuously illuminated, you would not be able to see
the scene IN THE EYE-LEVEL VIEWFINDER. But there is no inherent
limitation that would prevent the sensor image from being real-time-
previewed on the back-panel LCD. No one is doing it (yet), but
there's no big technological barrier. I'd say it's just a matter of
time before someone will do it, and it will be a popular feature that
doesn't necessarily add cost or compromise DSLR perfomance.

Martin

The two latest Olympus cameras have a live-preview from the sensor mode
(mode B live-preview?).
So it Oly wanted to, they could turn it into (with the next model) a
do-everything DSLR camera that shoots movies as well.
I don't know enough of the technical details of the sensor/camera to
answer as to why Olympus didn't.

Probably because they didn't want to offend their hardcore DSLR buyers
who consider such things to be hubris. sigh.

SayWhat wrote:
On Sat, 26 May 2007 03:09:16 +1000, dj_nme wrote:

Martin wrote:

snip for brevity
Think "out of the box". You are correct that, with the mirror locked
and the sensor continuously illuminated, you would not be able to see
the scene IN THE EYE-LEVEL VIEWFINDER. But there is no inherent
limitation that would prevent the sensor image from being real-time-
previewed on the back-panel LCD. No one is doing it (yet), but
there's no big technological barrier. I'd say it's just a matter of
time before someone will do it, and it will be a popular feature that
doesn't necessarily add cost or compromise DSLR perfomance.

Martin
The two latest Olympus cameras have a live-preview from the sensor mode
(mode B live-preview?).
So it Oly wanted to, they could turn it into (with the next model) a
do-everything DSLR camera that shoots movies as well.
I don't know enough of the technical details of the sensor/camera to
answer as to why Olympus didn't.

Why bother to try to make a dSLR as good as a good P&S camera? Dump that
over-priced, low-life-span mechanical shutter, image-shaking, mirror-slapping,
noise-making, last century SLR technology and get a P&S camera that already does
everything and more than you'll ever need.


Horrors, Blasphemy! Grin.

"dj_nme" wrote in message
...
SayWhat wrote:

On Sat, 26 May 2007 03:09:16 +1000, dj_nme wrote:


Martin wrote:

snip for brevity

Think "out of the box". You are correct that, with the mirror locked
and the sensor continuously illuminated, you would not be able to see
the scene IN THE EYE-LEVEL VIEWFINDER. But there is no inherent
limitation that would prevent the sensor image from being real-time-
previewed on the back-panel LCD. No one is doing it (yet), but
there's no big technological barrier. I'd say it's just a matter of
time before someone will do it, and it will be a popular feature that
doesn't necessarily add cost or compromise DSLR perfomance.

Martin

The two latest Olympus cameras have a live-preview from the sensor mode
(mode B live-preview?).
So it Oly wanted to, they could turn it into (with the next model) a
do-everything DSLR camera that shoots movies as well.
I don't know enough of the technical details of the sensor/camera to
answer as to why Olympus didn't.


Why bother to try to make a dSLR as good as a good P&S camera? Dump that
over-priced, low-life-span mechanical shutter, image-shaking,
mirror-slapping,
noise-making, last century SLR technology and get a P&S camera that
already does
everything and more than you'll ever need.

I'm not the DSLR camera manufacturer that decided that live-view on a DSLR
camer is a good idea.
If you're going to go part-way (mode b live-view), you may as well go "the
whole hog" and put a movie mode in there as well.

It will probably be power consumption.. its the batteries that limit most
portable electronics.

In article ,
says...

"dj_nme" wrote in message
...
SayWhat wrote:

On Sat, 26 May 2007 03:09:16 +1000, dj_nme wrote:
[snip]
Martin wrote:
But there is no inherent
limitation that would prevent the sensor image from being real-time-
previewed on the back-panel LCD.
[snip]
It will probably be power consumption.. its the batteries that limit most
portable electronics.

Sure battery life would decrease with live preview for two reasons; 1)
the sensor would be live all the time and 2) the LCD would also be live
all the time. Battery life in only one of the reason I wouldn't want
live preview. If live preview is using the main image sensor you are
also creating heat which will make for noisier pictures. Low noise at
high ISOs is one of the main reasons I like my DSLR. If a manufacturer
adds live preview to a DSLR I hope they have the sense to use an
auxilery CCD.

I once used my Kodak P850 to take pictures for my brother at a cub scout
banquet for his sons. I took pictures pretty much continously for 4
hours. When I got home I noted that the pictures got progressively
noisier. The final shots of the day looked like they were taken in a
snow storm.

KenJr wrote:

snip
I once used my Kodak P850 to take pictures for my brother at a cub scout
banquet for his sons. I took pictures pretty much continously for 4
hours. When I got home I noted that the pictures got progressively
noisier. The final shots of the day looked like they were taken in a
snow storm.

Heat does effect DSLR cameras as well, but to a lesser extent.
I've used my Pentax ist-DS in nightclubs where the temp must have been
around 30 degree centigrade (about 92 F) and progressively over the
night the images became so noisy that the ISO 3200 setting became almost
unusable.
The ambient temp had effected the noise characteristic of the camera.
No digital camera is immune, unless extraordinary measure are taken.