[opendtv] Re: DSLRs Push HD Video Envelope
- From: Doug McDonald <mcdonald@xxxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Thu, 02 Sep 2010 07:31:37 -0500
On 9/2/2010 7:18 AM, Craig Birkmaier wrote:
At 6:27 PM -0500 9/1/10, Manfredi, Albert E wrote:
The Pop Photo articles I've read on these "full frame" DSLRs rarely if ever
talk about the image
quality advantage of moving the pixels further apart in the sensor. Mostly,
they like full frame
DSLRs because 35mm camera wide angle lenses retain their full wide angle
potential when used in
these DSLRs.
Some of these cameras support a technique known as HDR or high dynamic range
imaging.
http://en.wikipedia.org/wiki/High_dynamic_range_imaging
Essentially when you take the picture there are three exposures, which are then
combined to extend
the dynamic range of the image. I've seen this in Photoshop before; yesterday
Apple announced that
it is included in iOS 4.01 and the cameras in the iPhone 4 and new iPod Touch
now offer this as a
shooting option.
The basic advantage of a larger sensor is that you can if you wish
put more photons onto it, resulting in better low light performance.
It also allows you, if you wish, to get a narrower depth
of field, very useful fro artistic effects. You can always
get the same picture as a smaller sensor by stopping down the lens,
if you want wider depth of field.
Comparing the full frame and 1.6x crop dSLR camera the difference
is not huge. Between a full frame dSLR and a small-sensor
point-and-shoot the differences are dramatic.
I almost bought a full frame dSLR this summer but didn't because
my present camera (a Canon 30D) produces 11x16 prints that
are plenty good.
Doug McDonald
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