Overheating Sensor during video?
- Thread starter CanonEOS
- Start date
DSLR with video is not meant for FULL TIME videoing.
As you already mentioned yourself, if you want to do mainly video, it's easy to know that you need a dedicated videocam.
VDSLR is really good for people who occasionally needs 1-2 mins short footage of some candid moments, like pets or kids or family outings where we do not need to carry 2 equipment.
Anyway, for such footage, it normally would be quite boring if the video is more than 2 mins....
pepsi330ml
New Member
for nex 5... i think it can last 20+ also...
stonefish35
New Member
Funny how Roystan Tan can shoot his Old Places of Singapore entirely on 5DMII and this http://philipbloom.net/2010/04/10/house-season-finale-shot-entirely-with-canon-5dmkii/
I am not saying XX brand VDSLR is better than YY or ZZ brand. Its just that, the professionals had done it, will continue to do it. There are always workarounds. From my understanding, production house like it. Giving them the options of tonnes of lens to work with. WA, FE, telephoto etc... Just wondering how they overcome the overheating issues only. Maybe shoot in short clips.. and to stich them up into a full video... ?
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5D also has limit, if I am not wrong, about 30mins.
Just found the info from Wiki:
http://en.wikipedia.org/wiki/Canon_EOS_5D_Mark_II#Video_recording
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albertri
Senior Member
I read somewhere they normally take 10-15 mins per take and they are using 7 cameras
Overheating of HDSLR cameras by 11 minutes or more in 30 degree condition in video capturing
or recording is partly due to the scanning of the APSC sensor or FF which generates more heat as compared with non-scanning in the still image. In handycam, the sensor is smaller and so less heat is generated.
or recording is partly due to the scanning of the APSC sensor or FF which generates more heat as compared with non-scanning in the still image. In handycam, the sensor is smaller and so less heat is generated.
Rocky78
New Member
I guess I learn now that cameras are not practical to take videos longer than 30 minutes and cannot replace camcorders.
I wonder how the camcorders handle this heat problem.
Perhaps they can solve this camera problem in the future like the camcorders.
Then what about mobile phones with a 16 GB SDHC card and does a long video recording ? What happens ?
I wonder how the camcorders handle this heat problem.
Perhaps they can solve this camera problem in the future like the camcorders.
Then what about mobile phones with a 16 GB SDHC card and does a long video recording ? What happens ?
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albertri
Senior Member
I guess I learn now that cameras are not practical to take videos longer than 30 minutes and cannot replace camcorders.
I wonder how the camcorders handle this heat problem.
Perhaps they can solve this camera problem in the future like the camcorders.
Then what about mobile phones with a 16 GB SDHC card and does a long video recording ? What happens ?
The technology between camcorder is slightly different and the sensor size differs also Panasonic is introducing a 4/3 sensor digital professional video cam I think that holds the answer to your questions
but looking...The technology between camcorder is slightly different and the sensor size differs also Panasonic is introducing a 4/3 sensor digital professional video cam I think that holds the answer to your questions
Same for nex vg10.
The way the sensor is mounted in a camcorder, there are a lot more spaces behind the sensor, so probably there is a heatsink or fan to cool the sensor.
stonefish35
New Member
I read somewhere they normally take 10-15 mins per take and they are using 7 cameras
I see thats. Thats my guess too .
Hi, Some overheating solutions, every little bit helps:-
Use tripod or other kind of rig rather than hand-hold
use large metal lens as a sort of heat sink to absorb heat instead of plastic
retract swivel LCD away from camera body for ventilation
shoot short video sequences of around 8 minutes
then notice whether the warning thermal goes off
Use tripod or other kind of rig rather than hand-hold
use large metal lens as a sort of heat sink to absorb heat instead of plastic
retract swivel LCD away from camera body for ventilation
shoot short video sequences of around 8 minutes
then notice whether the warning thermal goes off
albertri
Senior Member
Having lunch at raffles and on our way back saw someone shooting a commercial using DSLR Canon 7D I think but thier setup is they have a separate LCD panel they are not using the camera LCD...
Yeah I think it could help a bit normally to me if not in use I turn off the camera it self or I have the LCD timer set to 20sec so when not in use both EVF and LCD will auto shutdown in 20 sec... the problem here is when you want to shoot you either need to press any button or half press the shutter to wake up the LCD
boombox
Senior Member
One important area to look at in terms of sensor overheating is the form factor.
DSLRs and DSLTs are based on SLRs where enough space in depth is offered for film, so replace it with a Sensor, which is mounted on a PCB, then with a powerful processor not far from it, then it's all mounted flush against the rear side of the cam, against a LCD backlight, or against the plastic rear end (in the case of Articulating screen DSLR/DSLTs), and you can see that there isn't much space for cooling. The problem compounds when the body becomes even bodies. All these add up to generate a lot heat in a small place.
If you look at the actual video performance times of a A33 and A55. The A55 has a denser sensor, a faster processor to process more information. That's why you'd see that it will choke on heat even sooner than the lower spec'd model.
The design of DSLR/DSLT's form factor is as such that, it's got little depth to provide adequate space for efficient cooling, especially when compared to Video-cam form factor machines.
The layout for traditional camcorders allows for quite a bit of space between the rear end of the sensor and the corresponding PCBs, to allow for more efficient cooling of the system, a tried and tested form factor. That's why you don't get limits with you operate video cams, they got depth in space. So with the A33/NEX3/5 burning up eventually, you don't get this with the VG-10.
DSLRs and DSLTs are based on SLRs where enough space in depth is offered for film, so replace it with a Sensor, which is mounted on a PCB, then with a powerful processor not far from it, then it's all mounted flush against the rear side of the cam, against a LCD backlight, or against the plastic rear end (in the case of Articulating screen DSLR/DSLTs), and you can see that there isn't much space for cooling. The problem compounds when the body becomes even bodies. All these add up to generate a lot heat in a small place.
If you look at the actual video performance times of a A33 and A55. The A55 has a denser sensor, a faster processor to process more information. That's why you'd see that it will choke on heat even sooner than the lower spec'd model.
The design of DSLR/DSLT's form factor is as such that, it's got little depth to provide adequate space for efficient cooling, especially when compared to Video-cam form factor machines.
The layout for traditional camcorders allows for quite a bit of space between the rear end of the sensor and the corresponding PCBs, to allow for more efficient cooling of the system, a tried and tested form factor. That's why you don't get limits with you operate video cams, they got depth in space. So with the A33/NEX3/5 burning up eventually, you don't get this with the VG-10.
albertri
Senior Member
One important area to look at in terms of sensor overheating is the form factor.
DSLRs and DSLTs are based on SLRs where enough space in depth is offered for film, so replace it with a Sensor, which is mounted on a PCB, then with a powerful processor not far from it, then it's all mounted flush against the rear side of the cam, against a LCD backlight, or against the plastic rear end (in the case of Articulating screen DSLR/DSLTs), and you can see that there isn't much space for cooling. The problem compounds when the body becomes even bodies. All these add up to generate a lot heat in a small place.
If you look at the actual video performance times of a A33 and A55. The A55 has a denser sensor, a faster processor to process more information. That's why you'd see that it will choke on heat even sooner than the lower spec'd model.
The design of DSLR/DSLT's form factor is as such that, it's got little depth to provide adequate space for efficient cooling, especially when compared to Video-cam form factor machines.
The layout for traditional camcorders allows for quite a bit of space between the rear end of the sensor and the corresponding PCBs, to allow for more efficient cooling of the system, a tried and tested form factor. That's why you don't get limits with you operate video cams, they got depth in space. So with the A33/NEX3/5 burning up eventually, you don't get this with the VG-10.
oh yeah bro and also dont forget the cam corder although some claiming 5-10MP camcorder thier sensor size is pretty much smaller see those PnS camera where sensor size is 1/6 compare to FF? they also dont have overheating issue coz the sensor is small and the cpu is not that powerful...
and of course as you mentioned the design differs they may have heatsink inside mounted behind the sensor and/or the processor.Tamiyaevowrc
New Member
something i found from other links, maybe after the video the a33 exploded cos of the heat (sarcasm fully intended)
http://vimeo.com/15367938
http://vimeo.com/15367938
albertri
Senior Member
the one who did the MTV didn;t mentioned anything about the overheating thing hehehe so I would suggest it was all ok then
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