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Frequent Contributor
Posts: 81
Registered: ‎11-14-2018
Accepted Solution

EOS R image sensor

[ Edited ]

I have read a number of posts where long video sessions with a DSLR overheats the CMOS sensor.  So how is this handled in the mirror less EOS R cameras?  My understanding is that the image sensor is on whenever the camera is on.  I also am curious as to how the "electronic shutter" works.  Is it mechanical that is triggered by electronic means or does the camera just capture the sensor data when the "shutter" is pressed?  I would appreciate any information to help me better understand the new EOS R.

Frequent Contributor
Posts: 45
Registered: ‎12-26-2018

Re: EOS R image sensor

Mirrorless cameras overheat too when prolong video shooting, because they are not design to shoot video.

Get a Gopro 7 black mount on camera hotshoe to shoot 4K video, you will be happy.

Frequent Contributor
Posts: 81
Registered: ‎11-14-2018

Re: EOS R image sensor

[ Edited ]

Actually not interested in long videos.  Just what is going on with the sensor.  Looked at one today at best buy and it was ok, but not going to leave my 5D Mark IV any time soon.  $3400 for the EOS R camera and a 40-70 f4 seemed rather high.  Also didn't like the slide bar.  Would be a learning curve to get to where I am with my current 5D.

VIP
Posts: 8,339
Registered: ‎08-13-2015

Re: EOS R image sensor


@CaliforniaDream wrote:

Actually not interested in long videos.  Just what is going on with the sensor.  Looked at one today at best buy and it was ok, but not going to leave my 5D Mark IV any time soon.  $3400 for the EOS R camera and a 40-70 f4 seemed rather high.  Also didn't like the slide bar.  Would be a learning curve to get to where I am with my current 5D.


The slide bar and the frame rate are deal breakers for me.  Nope.

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VIP
Posts: 11,351
Registered: ‎12-07-2012

Re: EOS R image sensor

"I also am curious as to how the "electronic shutter" works."

 

Other than turning the sensor on for the amount of time asked for by the camera, a mirrorless camera works exactly the same as a mech shutter does. The mirrorless shutter operates by turning the cameras imaging sensor on and off to control exposure.  Its sensor is only on for the brief time of the shot.  Otherwise it is off.  If you use Liveview or video it stays on just like a DSLR.

EOS 1DX and 1D Mk IV and several lenses!
Frequent Contributor
Posts: 81
Registered: ‎11-14-2018

Re: EOS R image sensor

[ Edited ]

@ebiggs1 wrote:

"I also am curious as to how the "electronic shutter" works."

 

Other than turning the sensor on for the amount of time asked for by the camera, a mirrorless camera works exactly the same as a mech shutter does. The mirrorless shutter operates by turning the cameras imaging sensor on and off to control exposure.  Its sensor is only on for the brief time of the shot.  Otherwise it is off.  If you use Liveview or video it stays on just like a DSLR.


Do you know what sensor it uses for the electronic view finder?  I thought that it used the primary sensor, but that was just a guess.  There is a lot I don't know about the EOS R.

Esteemed Contributor
Posts: 3,414
Registered: ‎02-17-2016

Re: EOS R image sensor

Yes, it uses the primary sensor for the viewfinder.

 

https://en.wikipedia.org/wiki/Shutter_(photography)#Electronic_shutter

 

The R, of course uses a standard shutter and an electronic one. Unlike the Nikon or Sony, the R closes the shutter as the default, protecting it from dust while changing lenses.

VIP
Posts: 11,351
Registered: ‎12-07-2012

Re: EOS R image sensor

Mirrorless camera use a EVF, electronic viewfinder. In a mirrorless camera, light passes through the lens and right onto the image sensor. There is a second screen inside called the EVF that you look at. In a DSLR, optical VF, you are actually looking through the lens itself.

 

Personally I see no advantage to mirrorless cameras.  The few benefits they have are out weighed by the disadvantages. Mechanical shutters are still the best choice for flash photography and also when shooting under fluorescent lighting (or any other flickering light source). They are also preferable if you're shooting raw files and want to maintain the maximum bit depth or when you are using wide apertures and want to maintain a soft, undistorted bokeh. They don't suffer form lag time either.

EOS 1DX and 1D Mk IV and several lenses!
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Honored Contributor
Posts: 5,009
Registered: ‎06-25-2014

Re: EOS R image sensor


@kvbarkley wrote:

Yes, it uses the primary sensor for the viewfinder.

 

https://en.wikipedia.org/wiki/Shutter_(photography)#Electronic_shutter

 

The R, of course uses a standard shutter and an electronic one. Unlike the Nikon or Sony, the R closes the shutter as the default, protecting [the sensor] from dust while changing lenses.


And from damage by excessive light if the camera is inadvertently pointed at the sun?

Bob
Philadelphia, Pennsylvania USA
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