Canon 5d mark iii improved- olpf removed for higher resolution

HansSteinert said:
www.youtube.com/watch?v=AfA2mTMt0u8

Look at the resolution test. 5D III video compared to what perfect 1080p looks like.
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Complaints of 'mosquito noise' = ALL-I macroblocking. Higher bitrate != Higher quality in this case. IPB for quality, ALL-I only for rare case of slow computer/no transcode time (and max quality is not important).

Regarding downscaling a still to 1920x1080p as a quality reference- agree that's what we should see (put that in my first resolution test a few weeks ago).
 
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Ok, you guys are starting to get silly! Youre asking the cam to take a jpeg at 5760x3840, rescale it up to 30 times/sec into a 1920x1080 image? LOL! Do you want photoshop installed in the camera too? How about keyless entry for your car while you're at it?
Hers what you do. Set your cam up to take a 1920x1280 jpeg(because the camera can do that) and look at that!
Do that and look at the aliasing.
 
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nothing said:
jcs said:
nothing said:
What connector? An OLPF is a piece of glass, no electronics involved. That's the the "O" is for - Optical Low Pass Filter.
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nothing- see the tear down pics- there's a connector.
bernard- connector is for dust vibration cleaning system.

After thinking about this further, I think the reason we're not seeing more aliasing is due to the low-pass filtering effect of pixel binning the Bayer array.
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Why don't you guys go out and shoot something instead of pixel peeping yourself in circles? This has turned into the most ridiculous thread ever, people obsessing over the insides of someone else's camera and hypothesizing BS about every connector.

An OLPF is just a piece of glass. It blurs, nothing more, nothing less.
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nothing,

Lammy forgot to add your mamma should be proud.


Lammy said:
Dear nothing. Your username is very apt for the contribution value of your post.
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dustylense said:
Ok, you guys are starting to get silly! Youre asking the cam to take a jpeg at 5760x3840, rescale it up to 30 times/sec into a 1920x1080 image?...
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Actually yes, that's exactly what we are expecting cameras to eventually do! Better yet, 2048x1152 at 120 frames per second. That way you ccould crop and stabilize to 1080HD at any frame rate you might need :)

Cheers,
Pete
 
Emanuel said:
Christopher, can you call silly to this 1080p outcome?



I wouldn't.

Thanks John for your collaboration to this thread. Much appreciated (E :-)
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Ok, as a person who has owned EVERY FF canon digital slr they have made, I will say this. DUST!!!! Fine, removing the oplf is seeming to sharpen the image. It's other function is the dust removal system. Go ahead, remove it and enjoy a dirty image. In a still it's fine, you can spend 15 minutes retouching the dust on your sensor. Video? Be my guest. You wanna know how many times Ive done a wet clean in FF Canon dslr's without that anti dust system?
If you like Bloom's video, then leave your camera alone. If you want an extra bit of sharpness in cam, remove the oplf. Just get yourself a good cleaning system. An air bulb WILL NOT cut it.
Im on a combo still/vid shoot and my client is going crazy how good the stuff looks.
 
I think what Christopher was saying is that the hardware for the 5D3 is designed for stills (and video), and that it (perhaps) can't process a full resolution 23mpix still down to 1920x1080 in real-time. I show the downsampled full res JPG still in my resolution tests as reference for what the best can be (1000+ lines). Most folks believe Canon is doing some form of pixel binning to get down to 1920x1080p (even if the DIGIC5+ is involved).

Regarding getting out & shooting: I do so whenever I have free time! :) I comment on this forum between code compiles and other work while in the office (work at work and in home office- all the time). Figuring out a new camera is a puzzle. Folks enjoy puzzle solving!
 
jcs said:
Hmm. I wonder if dustysensor has been taken as a nickname? :tongue:
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Before the anti dust system, I've probably retouched 500,000 dust spots in stills. Since, maybe 100. Choose wisely if you decide to remove the oplf. I'm wont do it.
 
dustylense said:
Ok, as a person who has owned EVERY FF canon digital slr they have made, I will say this. DUST!!!! Fine, removing the oplf is seeming to sharpen the image. It's other function is the dust removal system. Go ahead, remove it and enjoy a dirty image. In a still it's fine, you can spend 15 minutes retouching the dust on your sensor. Video? Be my guest. You wanna know how many times Ive done a wet clean in FF Canon dslr's without that anti dust system?
If you like Bloom's video, then leave your camera alone. If you want an extra bit of sharpness in cam, remove the oplf. Just get yourself a good cleaning system. An air bulb WILL NOT cut it.
Im on a combo still/vid shoot and my client is going crazy how good the stuff looks.
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http://www.youtube.com/watch?v=lpSi27u4azQ

Not good solution?
 
dustylense said:
Before the anti dust system, I've probably retouched 500,000 dust spots in stills. Since, maybe 100. Choose wisely if you decide to remove the oplf. I'm wont do it.
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Ah- got it.

Your client(s) is(are) happy with the video quality? Native or post-sharpened?
Unless cost prohibitive, it is possible to create a new piece of optical glass with a vibration sensor to replace the OLPF. Maybe even Canon will provide the part based on demand (another way to make a buck).
 
jcs said:
Ah- got it.

Your client(s) is(are) happy with the video quality? Native or post-sharpened?
Unless cost prohibitive, it is possible to create a new piece of optical glass with a vibration sensor to replace the OLPF. Maybe even Canon will provide the part based on demand (another way to make a buck).
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Client is happy before post sharpen. Hasn't said a word. However, they are viewing on my location 1080p location monitor. I told them it will be sharper and they replied, "sharper then it this? Damn"! No dust either and instead of pixel peeping, I dust peep. Not one single speck so far and I've changed lenses a ton indoor and outdoors.
 
dustylense said:
Client is happy before post sharpen. Hasn't said a word. However, they are viewing on my location 1080p location monitor. I told them it will be sharper and they replied, "sharper then it this? Damn"! No dust either and instead of pixel peeping, I dust peep. Not one single speck so far and I've changed lenses a ton indoor and outdoors.
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And isn't there any other solution to clean it?
 
shooter_ said:
And isn't there any other solution to clean it?
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Back before auto cleaning my process was this.
You needed the following. An air bulb, a visibledust sensor brush, can of dust off, and a wet clean package.
You start with the air bulb holding the cam with sensor down so hopefully the dust falls out. Then I would take the visibledust brush and blow the brush with an air can (to electro charge the brush) then sweep the sensor. I would then shoot a smooth surface and see if I got it cleaned. Repeat if needed. Last resort was a wet clean. Not for the faint of heart.
I would do this twice a day while on a shoot. And even then I would still have 1 or 2 dust spots in image (better than 20 or so).
It would be worse if you were in a dry static climate.
I still carry that cleaning kit. But I rarely use it with auto clean systems. My kit is the most effective system and method, as I've tried them all.
Twice a day, and it still would leave a speck or 2 leaving me no option but to wet clean.
Remove that olpf and not only are you going to lose your warranty, but you're going to get real familiar to the process I just explained above. Like I've stressed, it's easy to retouch a still photo, but not video if you have 5 or so dust spots on your sensor.
 
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