canon 5d mk2

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johnxl1s
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Joined: Feb 3 2003
i have been told that  12 mins is the recording limit on the 5d... or it will heat up etc
anyone know or have one
john
PP
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Joined: Jan 30 2004
Re: canon 5d mk2
John, I think it's to do with the FAT 32 system.
 
Peter

Peter

johnxl1s
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Re: canon 5d mk2
ok
thanks
john
steve
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Re: canon 5d mk2
John,
 
The time limits on Canon SLRs are as follows:
 
1) In order to avoid classification as video recorders, they must not record continuously for more than 30 minutes so they are limited to 29:59 for any resolution
2) As Peter says above, they use FAT32 file systems and record 1080p at bitrates averaging between 40 and 50MB/s, so they will exceed the 4GB FAT32 file size limit after about 12-15 minutes, e.g. at 45Mb/s, the limit is reached after 12:43.
3) Most of the cameras tend to overheat when used continuously in some conditions. Some of the more recent models with articulated LCD screens seem to go longer before running into problems.
 
In reasonable temperatures, the FAT32 limit is the one you would encounter first when shooting in 1080p modes. I think the magic lantern firmware add-on may allow concatenation of FAT32 clips, but there will be gaps in the recorded action between them.
StopMoFred
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Re: canon 5d mk2
From my experience, overheating is more of a problem with Nikon than with Canon.
 
I use a Canon DSLR  body in 'Live view' mode, with Nikon and Zeiss glass, for stop motion animation.
I use an AC adapter for power, with shooting session times of 2 or more hours, without the body
automatically shutting down due to overheating.
I have tried my workflow with a Nikon DSLR body, and that shut down after 10 minutes !
 
steve
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Re: canon 5d mk2
I have no experience of Nikon cameras, either as still shooters or for video. Many users have reported overheating, particularly the 7D and 550D models. Occasionally, in warmer climes there are reports of 5D2s having problems. My 550D has overheated twice, - neither time was the ambient temperature greater than 15-16 deg. C.
The newer models that have articulated LCD screens, (600D, 60D) seem to fare better.
Overheating of SLRs is more likely to be a problem as their sensors and surrounding circuits have thermal designs primarily rated for intermittent use as would be the case for still photography. Even in live mode, the duty cycle is unlikely to create the same thermal stresses that continuous video would.
johnxl1s
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Joined: Feb 3 2003
Re: canon 5d mk2
ok!
 
thanks,
 
anyone use this magic lantern ?
john.
johnd
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Re: canon 5d mk2
steve wrote:
 
 
In reasonable temperatures, the FAT32 limit is the one you would encounter first when shooting in 1080p modes. I think the magic lantern firmware add-on may allow concatenation of FAT32 clips, but there will be gaps in the recorded action between them.
 
concatenation  - that's going to be my new word of the day ;)
 
steve
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Re: canon 5d mk2
johnd wrote:
 
concatenation  - that's going to be my new word of the day ;)
 
 
I would have used 'contiguous' but they clearly don't join properly.
steve
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Re: canon 5d mk2
johnd wrote:
 
concatenation  - that's going to be my new word of the day ;)
 
 
I would have used 'contiguous' but they clearly don't join properly.
paulears
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Re: canon 5d mk2
The extra tax placed on 'video recorders' has surely no a dinosaur, legislation wise. For years we've had professional kit blighted with this daft law. Video camera without inputs enabled that the rest of the world have, and all those widgets we had to enable them. Now to keep it legal it's a limit on time.
 
If you can afford a 5D Mk X you probably can afford the extra tax (5%) I think. Most professional buyers buy kit because they've decided they need it - so although the extra would annoy it wouldn't be a killler.
 
I actually only discovered this yesterday. I assume this is what the GH2 hacks are all about?
 
For me, this time restriction means I'll never be a DSLR man!
 
Philip Bloom has a really interesting Mk 2 v mk 3 clip on vimeo.
steve
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Re: canon 5d mk2
The EU tariff on 'video recorders' is, I agree an anachronism now as there is afaik no VCR manufacturer in the EU. However, it is a source of income for the EU and if it was removed,something else would need to be raised in tax of tariff levels.
I agree that anybody making a decision at the 2k GBP level should not be influenced by a 10% (I think) increase if it does the job. The probelm is that by volume, pro kit is in  the minority, certainly by sales value so it will probably stay as video kit is hardly an essential to most people's lives.
paulears
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Re: canon 5d mk2
Just as a side issue, avoiding duty is a criminal offense, so does that mean anyone with a hacked camera is actually a criminal in the same way smuggling in extra cigarettes is? I wonder if anyone has ever been prosecuted? Would it also be an offense to sell the camera.
steve
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Re: canon 5d mk2
I doubt that an individual would be guilty modifying a camera to circumvent the manufacturer's 'design feature'. HMRC has a relationship with the importer, not a customer who purchased within the UK (or EU in this case.
If such modifications became too easy, then they may put pressure on manufacturers to raise the hurdle to modification as any token design gesture that everybody knew could be circumvented could be deemed as avoiding the duty.
I believe that this happened about 10 years ago on DV cameras where the ext. record capability could be enabled by altering a NVM flag. Later designs had a hardware fix that meant opening the camera up to enable DV IN and invalidating any warranty.
As far as selling a device/service of circumventing the rules were concerned, I don't think the suppliers of DV IN widgets were approached, it was the cameras' weak original design that was the real issue. Once the camera designs were changed, their market disappeared.
In practice, very few buyers need the DV IN function and the problem has gone away with flash card media recording. There is no such thing as a VCR industry in the EU so the duty is just another anomaly in the complex web of import tariffs and there is no real pressure to change it.