[Klaus]

[quote name='Brightcolours' timestamp='1283799192' post='2546']

Early users are starting to notice that the camera gets warm with extended use (2 hours, A33) and starts to give a yellow warming light.



Nikon and Canon APS-C DSLRs also get warm and give warnings after prolonged live view and video use (the big APS-C sensors do generate a lot more heat than the smaller sensors used in compact digitals), so maybe those reports should not be very surprising?

[/quote]



Early users of the EOS 5D II digged out various defects occuring in certain scenarios.

They were at least partially fixed via firmware. Yet I'm still using the factory firmware because it just didn't matter in the real life.

A camera getting warm after 2h of continuous use ? Oh my god ... the world falls apart ...

[Brightcolours]

[quote name='Klaus' timestamp='1283857202' post='2567']

Early users of the EOS 5D II digged out various defects occuring in certain scenarios.

They were at least partially fixed via firmware. Yet I'm still using the factory firmware because it just didn't matter in the real life.

A camera getting warm after 2h of continuous use ? Oh my god ... the world falls apart ...

[/quote]

Hmm? The world falls apart?



Just reporting on a drawback of continuous live view (something that is already known from other APS-C cameras quitting operation after continuous live view/video/USB tethered operation).



I did not say it makes a Sony A55V or A33 useless, just pointing at a drawback about continuous live view.



About the 5D mk II:



I only remember one defect: RAW data could be misinterpreted and stored incorrectly when bright spots would be saturated/clipping, where all of a sudden totally full would be stored as totally empty (resulting in small black spots in highlights). That RAW data interpretation indeed has been fixed via a firmware update (along apparently with a lower noise banding).



For the rest it has gotten a feature update especially for its video capabilities.



Neither have to do with that live view makes sensors generating so much heat that manufacturers build in heat monitoring and warnings/shut down of functionality because of it, though. So I am not sure why you bring up the 5D mk II here <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/ohmy.gif' class='bbc_emoticon' alt='' />



It is worth mentioning this about the A55V and A33 in particular, because these SLR like cameras are the first to totally rely on live view (with APS-C size sensors). In warmer conditions the "2 hours" naturally will shorten.

[Yakim]

Klaus, a more important question is if you noticed that ghosting issue?

[popo]

[quote name='Klaus' timestamp='1283857202' post='2567']

A camera getting warm after 2h of continuous use ? Oh my god ... the world falls apart ...

[/quote]

A conventional DSLR used for stills via the OVF doesn't get really hot though... at least none of the ones I've handled, unless you count using them in direct sunlight where I think a white body to go with the lens might help as long as it doesn't look like Apple.



I note the Axx cameras have the eye detect sensor under the EVF. I have to admit I've not looked in detail at operation, but understand it switches between live view on big screen and EVF. Does it also allow EVF or off? That would save the main sensor heatup and maybe a bit of battery life too.

[popo]

[quote name='Yakim' timestamp='1283864965' post='2569']

Klaus, a more important question is if you noticed that ghosting issue?

[/quote]

Ok, not Klaus, but dpreview just updated their review to include the ghosting. They estimate the ghosts to be 8EV down, which is towards the worst end of my earlier calculation.

[Brightcolours]

[quote name='popo' timestamp='1283867093' post='2572']

A conventional DSLR used for stills via the OVF doesn't get really hot though... at least none of the ones I've handled, unless you count using them in direct sunlight where I think a white body to go with the lens might help as long as it doesn't look like Apple.



I note the Axx cameras have the eye detect sensor under the EVF. I have to admit I've not looked in detail at operation, but understand it switches between live view on big screen and EVF. Does it also allow EVF or off? That would save the main sensor heatup and maybe a bit of battery life too.

[/quote]

No, both the live view via the LCD back panel and the live view via the EVF get their signal from the imaging sensor. So it does not matter if you look through the EVF or not, the sensor will heat up.

[Yakim]

We shot hundreds of frames with two samples of the A55 and the A33 in 'real world' environments, and after examining them all pragmatically as well as critically, we're confident that Sony has controlled this issue very well.



Good to hear.

[popo]

[quote name='Brightcolours' timestamp='1283867660' post='2574']

No, both the live view via the LCD back panel and the live view via the EVF get their signal from the imaging sensor. So it does not matter if you look through the EVF or not, the sensor will heat up.

[/quote]

What I meant was, let's say you only want to use the EVF. When the eye sensor doesn't detect you using it, it can then turn the main sensor off as opposed to using it to drive the big screen view.

[mst]

[quote name='Brightcolours' timestamp='1283867660' post='2574']

No, both the live view via the LCD back panel and the live view via the EVF get their signal from the imaging sensor. So it does not matter if you look through the EVF or not, the sensor will heat up.

[/quote]



What popo suggested was to switch the video feed off if the eye sensor detects that noone is looking through the viewfinder.



-- Markus

[Brightcolours]

[quote name='popo' timestamp='1283867560' post='2573']

Ok, not Klaus, but dpreview just updated their review to include the ghosting. They estimate the ghosts to be 8EV down, which is towards the worst end of my earlier calculation.

[/quote]

8 stops... I do not know how they measured that exactly.



But the ghost lights in dusk till dawn images are very bright. To me it seems that dpreview is trying to downplay the matter more than it should be downplayed, I feel imaging resource is being more clear (honest?) about the matter.



A few examples that are NOT about dusk till dawn city scapes:



From the dpreview studio shots:

A55v



NEX 5





We can see a ghost of the gold band/arc in the black label with the A55v. That is not 8-stops, if a DSLR has 8 stops DR?

A55V



NEX 5





We can see the white band ghosting into the dark blue.



Another image crop to illustrate the ghosting:



(ghost sideways as image was taken in portrait orientation)



Again, one does not have to care about the ghosting... but it is very evident in more situations that I thought it would before. That is because now we have access to RAW conversion results, the soft JPEGs were hiding it more.