If they CAN build a DSLR that records a 1080p video without a crop factor, why can't they build one that records @ 4k without crop factor?

Question

I use canon's 17mm TS-E lens for architectural videos. It behaves as a 17mm when recording 1080p video. But behaves as a 29 mm when i record in 4k. Its a bit crazy. I know i can use a 10 mm lens that behaves as a 17 mm but this is no Tilt/ shift lens, so it ends up destroying all the efforts of keeping the vertical lines vertical.

Answer 1

Using the whole sensor in a dSLR for video causes a major problem of heat dissipation.



It also produces a huge amount of data which has to be shifted around internally and processed immediately. That also causes a lot of heat, but it also requires a far more power-hungry processor. In turn that would munch through battery charge in no time.



Mirrorless CSC and m4/3 cameras can use the entire sensor but that’s because the sensor is far smaller and so much easier to keep cool. But they still struggle with the heat, data processing and buffering and they also have smaller batteries which store far less charge, so run flat far faster.



All those problems are solvable. But you then end up with a bulky broadcast-grade video camera.



Video on all still image cameras is not their primary task. Some now have very impressive video capability but compared to what a dedicated video camera can do it’s still very much a poor relation. I hate paying for a feature I never have any use for.

Answer 2

Dk

Answer 3

"They" already built a dSLR that can record video using the entire sensor. In the end, they called it a camcorder.

Answer 4

Don't ask the public in general, direct your query straight to the designers of such cameras. It would be surprising if they are not working hard on just such an improvement.

Answer 5

Thank you for yet another reason to explain why dSLRs, designed for still image capture, are not the correct choice for video capture.

Answer 6

they can.but most users buy SLRs to shoot photography...we also have mirrorless to shoot 4K...

Answer 7

Why not just buy a camcorder to begin with?

Answer 8

Hi so give it time it will happen.

Answer 9

They already exist from Panasonic (e.g. GH4 and GH5), and some of the Sony cameras.



None of the Canon cameras use the entire sensor when recording 4K. Not because Canon can't do it, but because they don't want to do it. Canon sells 4K camcorders and putting a DSLR on the market that uses the entire frame in video mode will hurt their camcorder sales. Nikon is so far behind in video, I just think that they don't have the patented technology to do it. Unlike Canon, who's been making camcorders for more than 30 years, Nikon never got into it. Instead, they use to purchase Sony camcorders and re-brand them as their own. And because of it, Nikon is the worst DSLR for video; right down there with Pentax.