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  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

Big New Canon Rumor - RAW Recording Module for 5D2 & 7D?

Stuart English said:
Thing is when you invoke a MAGNIFY mode, what's coming out of the chip is just a crop of a portion of the sensor.

The critical issue is what's coming out of the chip / being processed / being recorded when you are NOT in MAGNIFY...
Click to expand...

I think the only purpose of magnify is to easily check your critical focus - mainly in still mode, though this utility carries over to video. Obviously, one won't focus any better zooming to 1:1 HD than from the full sensor. In factice, though, I've found it perfectly usable - then again, I never expected it to be an accurate guide to the recording.
 
Hmmm, Tom any updates from your birdy? in any case- just wondering when the next big video / imaging expo is ?? trying to think of when canon might be announcing their new video body along with these possible raw/sraw DSLR recording modules (If they exist).

If they do come out, would be pretty interested to see some 1d footage raw!
 
RAW bandwdith

RAW bandwdith

Obviously, one won't focus any better zooming to 1:1 HD than from the full sensor.
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Sure you will, but the point I was making is that just because you can get a small portion of the full sensor out through the monitor pipeline without line-skipping -

i.e. via MAGNIFY MODE - does NOT automatically mean that you can get the entire sensor image out as data for recording. That takes a lot of bandwidth....
 
Usually it takes a certain small fraction of a second to read each row out. Read out fewer rows and your fps goes up, read them all out and it goes down. So, in 10x mode you're reading a 10th of the lines say, so you can probably read them out in full detail, do a demosaic and display to screen without any bother. But that could very well tax the limit of the pipeline.

Graeme
 
Stuart English said:
i.e. via MAGNIFY MODE - does NOT automatically mean that you can get the entire sensor image out as data for recording. That takes a lot of bandwidth....
Click to expand...

Oh dear, I certainly didn't mean to suggest that such things were possible - indeed, I think I said upthread that even going out via HDMI wasn't worth it. Nobody should currently expect better than the final h.264 output recorded to the CF card.

All I'm saying is that my personal experience with the magnify function is it works well for setting critical focus before hitting record, I didn't get any nasty focus surprises afterwards while reviewing the footage.
 
still alive humm?..
 
keeping it alive out of shear curiosity about this little birdy and whether these canon dslr's will get to move past h264
 
i emailed the source a few days ago. he's trying to look into it.

i think it is generally assumed now that Canon has a large-sensor "cinema camera" coming out sometime in "2010." if it has a nice recording format and at least 60fps, i'm sure it will sell like hotcakes.
 
Tom L said:
i emailed the source a few days ago. he's trying to look into it.

i think it is generally assumed now that Canon has a large-sensor "cinema camera" coming out sometime in "2010." if it has a nice recording format and at least 60fps, i'm sure it will sell like hotcakes.
Click to expand...

Tom you're so deepthroat man.

This is pretty interesting news. Whats even more interesting is seeing RED's one-upmanship in play in the coming year.
 
Okay, well the source is urging caution on this rumor. He says it's not possible to verify yet. So this should obviously be taken with a grain of salt.

....Now he's saying that the Canon RAW recorder module might be able to record 5K RAW, that it will attach via the "card slot," and that the RAW recorder "will cost more than the camera itself."

I'm not sure whether this is meant to work with existing vDSLR, future vDSLRs, or the rumored upcoming Canon cine camera.

Obviously 5K RAW from Canon would be huge, though.
 
Assuming that a raw module is necessary as the camera doesn't include raw compression as standard, that the data over the CF card would either be uncompressed or in some way decimated or truncated (8bit instead of the A-to-D 14bit say), you need to send 5120x2880 pixels over that link. That's 14745600 words (or bytes if you truncate). Or 14MB upwards, in easy to follow numbers. A CF card slot goes up to 133MB/s. That gives you just under 10fps (at 8bit) or less for higher bit depths.

So I'm going to take a rather large grain of salt on this one...

(even going to CFast only gets you up to 21fps 8bit 5k raw, so still no where near fast enough, and we're not even allowing for any transmission over-head in the rough numbers)

Graeme
 
I'm thinking if they do this it will have to be one of the Sraw modes for full motion.
 
Interesting. The source seemed not certain about the "card" connection. Maybe it's some new type of connection?

I probably won't say anything more about this until the source can confirm. Even he is urging caution on this 5K RAW thing. But he still seems convinced that the RAW recorder is coming.
 
sRAW is half the resolution for 3/4 the data rate. That gets you up to 28fps in 8bit raw. I hardly see 8bit raw going to cut it. And it doesn't get you to 5k, but 2.5k. The numbers not only don't add up, they don't multiply up either. And sRAW hardly solves the current aliasing issues either.

Graeme
 
They've not yet shown they can read their full sensors out at more than 10fps either...

Graeme
 
Graeme, what if this RAW recorder is for the rumored Canon cine camera, or for the 1Ds Mark 4, for example? Then all bets are off....
 
Perhaps.... But 1D IV doesn't have anything faster than CF slot though? The rumoured other camera is just building a rumour on a rumour and doesn't help verify the rumour.

As much fun as rumours are, doing a full featured large chip large resolution movie camera is somewhat tricky... :-)

Graeme
 
Yeah, but Canon has serious resources. If anyone could do it, it would be Canon.

The 1D M4 might not have anything faster, but perhaps the 1Ds M4 might? Who knows. Maybe the whole RAW recorder is based around a 5K APS-C cine cam?

As you say, it's only rumors on top of rumors at this point.
 
On top of rumours. But as soon as you start to go down this route, data rates, data pathways, memory bandwidth etc. all become massive issues. They're not insolvable, but neither are they trivial nor cheap to solve. That is indeed why video cameras have lagged behind digital stills cameras in resolution for so long.
 
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