C300 chroma aliasing again

N

nebular

Member
Since this issue wasn't discussed a while, are there any news?
Unfortunately this is still a serious problem of that camera.
I heard of a TV production here, trying to shoot some car scenes and they had to switch to Sony F3, due to being unable to shoot chrome parts of the cars.

Anybody heard of canon working on this? Any solutions? Camera adjustments?


This shot was handheld, which makes the problem worse, because those magenta/green artifacts are flickering around quit ugly. Was shot in 720p, Sharpness at -7 and i had an 1/8 BPM in front (which seems to be a little dirty :))
 

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Unfortunately no. This was a small music video with lots of 60 fps stuff, therefore i shot it completely in 720p. I didnt recognize those artefacts while shooting.
But i'm sure it would be still visible in 1080.
 
I'm not hearing anything in this direction from any of our clients....and I'd hear if it was showing up. I can say that the shot is into the sun and my 1st suspect would be the lens and/or filter (clean?,scratches?coating on the filter or lens?). Chromatic problems usually are a lens issue, especially with 3 chip cameras...anytime I have a problem with camera equipment, I try to isolate it by eliminating each part until I find the area that could be causing the problem. I'm sure you've already done that. As I've stated many times before, Canon is reading this and other blogs so I'm sure this is already in front of the engineers.

Jim Martin
Filmtools.com
 
That looks more like a lens flare issue. Can you reproduce that with specular reflections with the sun behind you?
 
Jim Martin said:
I'm not hearing anything in this direction from any of our clients....and I'd hear if it was showing up. I can say that the shot is into the sun and my 1st suspect would be the lens and/or filter (clean?,scratches?coating on the filter or lens?). Chromatic problems usually are a lens issue, especially with 3 chip cameras...anytime I have a problem with camera equipment, I try to isolate it by eliminating each part until I find the area that could be causing the problem. I'm sure you've already done that. As I've stated many times before, Canon is reading this and other blogs so I'm sure this is already in front of the engineers.

Jim Martin
Filmtools.com
Click to expand...

Yes, the Black ProMist seems dirty, but dirty filters don't do that. It's not a lens issue, you can actually get that chroma artifacts on the C300 with every lens. In my experience, it gets worse as better the lens gets (contrast and sharpness wise) and as more depth of field you have.
But here is a test-shot example with a crappy very old, very soft (fungus inside) zeiss 35mm wide open.


C300_chroma_3a.jpgC300_chroma_3b.jpg



So, softening the picture does not really help. The only solution so far seems to stop down, but sometimes you can't and you want that highlights/praticals or whatever blown out and in focus.

Razz16mm said:
That looks more like a lens flare issue. Can you reproduce that with specular reflections with the sun behind you?
Click to expand...
sorry, never seen lens flares looking like this.



Let's be clear, i don't want to blemish the C300, i really like the picture that comes out of that little body, but it's high time for Canon to offer a solution.
 
Same problem that was reported when the camera was released, it's been present since day one but most people seem to be able to live with it. It'll be interesting to see if it happens on the C100 / C500 as well.
 
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