What is the advantage of having a shutter?
Jan 2, 2017 17:55:15 #
I know some cameras don't have the shutter. I know that good cameras almost always have a shutter. What is the advantage of having a shutter vs none? I know the advantages of not having the shutter.
Jan 2, 2017 17:59:11 #
BebuLamar wrote:
I know some cameras don't have the shutter. I know that good cameras almost always have a shutter. What is the advantage of having a shutter vs none? I know the advantages of not having the shutter.
Most camera's the don't have a real shutter have a tendency to lag a while before they actually take the shot when you press the capture button. Most camera's with a shutter will take the picture instantly when told to. DSLR's have a mirror that allows the photographer to see what is seen thru the lens for real, not an LCD likeness of what the sensor sees. This is a benefit when tracking a subject and taking multiple frames in burst mode.
Jan 2, 2017 17:59:15 #
I've heard that some new cameras are at the point that the sensor can be turned around thus making the exposure. Is this what you are referring to? As far as I know all cameras have a shutter of some sort. Even when using a pinhole camera or a barrel lens on a view camera there is some way to control the duration of the light hitting the light sensitive medium. With pinhole camera it is usually made of tape with a barrel lens on a view camera it is usually a lens cap or a hat.
Jan 2, 2017 18:14:08 #
It beats having to remove and replace the lens cap in small fractions of a second.
--Bob
--Bob
BebuLamar wrote:
I know some cameras don't have the shutter. I know that good cameras almost always have a shutter. What is the advantage of having a shutter vs none? I know the advantages of not having the shutter.
Jan 2, 2017 18:16:44 #
BebuLamar wrote:
I know some cameras don't have the shutter. I know that good cameras almost always have a shutter. What is the advantage of having a shutter vs none? I know the advantages of not having the shutter.
Suggest you read this. Titled: Electronic VS mechanical shutter It is a few years old, but goes through and explains this topic quite well.
http://www.juzaphoto.com/article.php?l=en&t=mechanical_and_electronic_shutter
Jan 2, 2017 18:19:35 #
The speed of the shutterless sensor is limited by the readout rate.
Reading the sensor all at once requires a lot of electronics and real estate.
Reading the sensor all at once requires a lot of electronics and real estate.
Jan 2, 2017 18:20:55 #
Jan 2, 2017 19:08:56 #
golfercat
Loc: Southern Calif
Cameras have either a mechanical or electronic shutter.electronic shutters tend to give a long lag time from when the shutter release is pushed and the picture is taken. A problem with a moving subject.
Jan 2, 2017 19:35:35 #
golfercat wrote:
Cameras have either a mechanical or electronic shutter.electronic shutters tend to give a long lag time from when the shutter release is pushed and the picture is taken. A problem with a moving subject.
This isn't correct. Whether mechanical or electronic has no effect on lag time. Lag time is a function of how fast a camera can get ready, and take a shot. And both methods are also limited by how much time it takes to download the image information. In the case of mechanical, the shutter can close before the readout is accomplished, and the sensor continues uploading the last data. In the case of electronic, no shutter closes, and things in the scene that might change rapidly might produce the rolling shutter effect as the sensor uploads from one end to the other at its rated upload rate.
But the mechical still has to upload to the camera, and this still takes the same time.
Thus from the users perspective, both methods take the same time, but electronic is subject to rolling shutter.
Jan 2, 2017 19:59:58 #
JimH123 wrote:
... but electronic is subject to rolling shutter.
The better $5000-$10000 sensors don't suffer from rolling shutter.
Where as earlier sensors were read in serial format, they were slow but most now
combine serial and broadside for much improved cycle time.
Jan 3, 2017 00:23:22 #
oldtigger wrote:
That is great for those of you who can afford the total package built around that kind of shutter. The rest of us will have to cope with rolling shutter until Moore's Law brings the cost of that sensor technology down to the cameras we are willing to pay for.The better $5000-$10000 sensors don't suffer from rolling shutter.
Where as earlier sensors were read in serial format, they were slow but most now combine serial and broadside for much improved cycle time.
Where as earlier sensors were read in serial format, they were slow but most now combine serial and broadside for much improved cycle time.
Jan 3, 2017 06:02:05 #
billnikon
Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont
BebuLamar wrote:
I know some cameras don't have the shutter. I know that good cameras almost always have a shutter. What is the advantage of having a shutter vs none? I know the advantages of not having the shutter.
It keeps the sun from entering my room in the late afternoon.
Jan 3, 2017 06:18:25 #
Jan 3, 2017 06:50:52 #
Jan 3, 2017 07:14:28 #
BebuLamar wrote:
I know some cameras don't have the shutter. I know that good cameras almost always have a shutter. What is the advantage of having a shutter vs none? I know the advantages of not having the shutter.
Interesting articles -
"...digital cameras don't need a shutter. It's just easier and better if they have them."
David Busch
http://www.npr.org/sections/alltechconsidered/2009/05/do_digital_cameras_need_shutte.html
http://www.steves-digicams.com/knowledge-center/why-digital-cameras-have-mechanical-shutters.html#b
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