Video equal, will you sell your 7D for a T2i?

Video equal, will you sell your 7D for a T2i?

  • Yes will sell 7D

    Votes: 30 13.8%

  • No, im keeping 7D

    Votes: 123 56.7%

  • Dont have a 7D

    Votes: 64 29.5%
  • Total voters
    217
Barry_Green said:
Of course it'll come to the market in time, look how crazy cheap stuff is getting, the T2i is $799 MSRP...
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On a more serious note, aren't there camcorders which oversample from pretty dense sensors (~10MP) down to 1080p with less aliasing issues than the 7D/5D? Surely the real world cost of those ASICs isn't much according to the cost of those camcorders.
 
Just think back five years ago and what we thought was good video or what we thought was bad video.
 
Can you name what you're thinking of?

The only camera I can think of off the top of my head that oversamples a 12mpix image down to 1080p is the F35/Genesis. No aliasing or moire there. Of course, that's $350,000 too.


The Red One doesn't make a 1080p image, or do any sampling at all, really, it just reads its whole sensor and dumps it raw.

The 7D/5D (and D3s and t2i and GH1 and every SLR on the market) grossly *undersample* their sensors, and that's where the aliasing/moire come from. They only read about 10% of the pixels on the chip, and that's because the pricetag dictates the hardware used.
 
Barry_Green said:
Can you name what you're thinking of?
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What about all the consumer camcorders with 8-12MP sensors that have to downsample to 1080p? Like the Canon VIXIA HF S20 ($1000). It has a 9MP sensor but its max video resolution is 1080p so its got to do something to undersample/oversample.
 
shaocaholica said:
What about all the consumer camcorders with 8-12MP sensors that have to downsample to 1080p? Like the Canon VIXIA HF S20 ($1000). It has a 9MP sensor but its max video resolution is 1080p so its got to do something to undersample/oversample.
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Sorry, I don't really keep up on or pay attention to what's happening in the consumer realm; things change hourly over there and it's overwhelming.

Okay, just looked up the HF S20; it has an 8.59 mpix chip, but not in video mode; in video mode it uses 6 mpix. Which is still twice as many as a normal single-chip camera; normally on something like the HV20 you have 3mpix being read out, and de-bayered into a 1920x1080 (basically 2-mpix) image. So the HF S20 does seem like it's reading twice as many pixels as a normal video camera.

How? I don't know. Does it skip rows when in 1080i mode? Does it show any aliasing or moire? Or does the tiny size of the chip (about 1/10th the size of an SLR sensor) somehow help it to be able to read off faster?

I don't know the answers to that. But I do know that it is the speed of the sensor in the DSLR, and all the attendant hardware that goes with it, that prevents it from being able to be read out at full speed, which is why they resort to pixel binning and line skipping to get the frame rate up.
 
Finally watched it. Looks the same as all the other Canon DSLR footage to me. No improvements, but should be decent for anyone just looking to get a camera for themselves.
 
Canon never seems to get truly cinematic DPs to shoot their demo stuff. It looks good...but I think we'll really see how good when our peers online do some stuff and post it. If it really is as good, I'll make the jump perhaps. But I'm not going to do it just to gain $3-400. I would come late to the "switching" party and if the 7D used market is too saturated, I'll just keep on keeping on until the next coolest toy comes out. I've owned the 7D for what? Like 3 months now?
 
Kholi said:
Finally watched it. Looks the same as all the other Canon DSLR footage to me. No improvements, but should be decent for anyone just looking to get a camera for themselves.
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Agreed. But -- the improvement is that they just slashed the price in half. And so if it doesn't look any better, but now it costs half as much, that's still a huge step forward for lots of folks.
 
Barry_Green said:
Agreed. But -- the improvement is that they just slashed the price in half. And so if it doesn't look any better, but now it costs half as much, that's still a huge step forward for lots of folks.
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Suppose that could be considered an improvement for those seeking only video. The stills will suffer, similar to how they suffer between 7D and 5D as well.

Regardless, this is just another "okay" video image... which translates to: Panasonic please save us...
 
Kholi said:
Strictly speaking on hardware vs hardware. Variables expelled.
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Right but the sensor is the only thing that will affect image quality. To a lesser extent the processor if you shoot jpeg. The more robust body, faster mirror, faster AF, more buttons on the 7D don't directly affect the image quality but may affect the speed and efficiency of getting action shots. I wouldn't say the T2i will always be inferior to the 7D with respect to stills.
 
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