Aliasing & moire while filming landscape and nature... does the lens matter?

B

Breezer

Member
Here's an exemple ... http://vimeo.com/22187676 at 0.16

Are there lenses known to do a better job or is it simply, the sharper the lens, the more is aliasing & moire...?

Also, regarding super wide lenses... does the Tokina 11-16 produce alot of aliasing & moire when shooting landscape & nature at a certain distance? Or is the sigma 10-20 4-5.6 for exemple a better performer for that?

Thanks
 
Breezer said:
Here's an exemple ... http://vimeo.com/22187676 at 0.16

Are there lenses known to do a better job or is it simply, the sharper the lens, the more is aliasing & moire...?

Also, regarding super wide lenses... does the Tokina 11-16 produce alot of aliasing & moire when shooting landscape & nature at a certain distance? Or is the sigma 10-20 4-5.6 for exemple a better performer for that?

Thanks
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That's Aliasing not Moire. Secondly almost any and every camera would have done that trying to shoot that scene.

The best way around this is to frame your shots differently, any and every lens will cause Aliasing & Moire on these Canon dslrs. The only to avoid is to frame your shots in a different way or shoot with a shallow DOF
 
Use a tripod on all of it and let what your filming do the moving,the parts in the film done like that were ok.
 
There was moire in the red and white striped shirt. Sadly, I agree with vision_filmz that:

...any and every lens will cause Aliasing & Moire on these Canon dslrs
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The way to fix it is not lens selection or shooting technique -- it is for Canon to stop the marketing upgrades to their camera bodies and give us a real upgrade to their two year old Digic 4 image processor.
 
The sharper the glass, the more aliasing will "crawl out" of the image (for good or bad, alaising is also the reason why it looks crispy & good according to most eyes).

Jello, moire, alaising = the big be-aware before getting these cameras. As much as the occasional thread with a wall of text of complaint is funny and sad (not saying you do), you really have to understand these issues & learn to work around them if using these cameras. Real video cameras are still manufactured, and for a good reason. :thumbsup:
 
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I had the T2i and got tired of "these issues & learn to work around them"...
I went to the GH2 and most of those problems are solved.
The Canon was great for stills but that was a small portion of my work.
I went back to my Nikons for still work.
 
brunerww said:
There was moire in the red and white striped shirt. Sadly, I agree with vision_filmz that:



The way to fix it is not lens selection or shooting technique -- it is for Canon to stop the marketing upgrades to their camera bodies and give us a real upgrade to their two year old Digic 4 image processor.
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A better digic chip won't relieve moise/aliasing.

They have to redisign the chip from the ground up for video only. You can't have both so long as hd video has a resolution lower than digital stills.
 
it depends on whos watching it.

personally. i wouldnt have noticed. because im more a CD than a DP.
but i have clients who would have called me immediately, screaming "WHY IS THE GRASS VIBRATING!??!??!"

I went to the GH2 and most of those problems are solved.
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thats why i chose the gh2 over a 5D/7D
 
I think I've shot similar stuff with not-so-many artifacts; was this shot in 720p?


and by the way:
A better digic chip won't relieve moise/aliasing.
They have to redisign the chip from the ground up for video only. You can't have both so long as hd video has a resolution lower than digital stills.
Click to expand...

not true, you just need to use a better resampling algorithm; the current method of "just skip two of every three rows of pixels" is about the worst option I can think of

as proof, look at the GH2: 4976 x 2800 resampled to 1920x1080 with much much much less aliasing/moire than the current canons
 
wgzn said:
it depends on whos watching it.

personally. i wouldnt have noticed. because im more a CD than a DP.
but i have clients who would have called me immediately, screaming "WHY IS THE GRASS VIBRATING!??!??!"

thats why i chose the gh2 over a 5D/7D
Click to expand...

I have learned to not work with people who are too picky as some people would never be happy. Now I do agree that the shot has some problems & I would have done some things different. At the end of the day you just have to frame your shots different and refocus to try and avoid that.


For every bad comment given here about these cameras there will be equal amount if not more on the beautiful work you can do. Learn your tools and work around it's drawbacks. The industry uses these dlsrs. :thumbup:
 
Breezer said:
not my footage.. was looking at the sigma 17-70 and wondered if the lens had anything to do with it...
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ok, then I'll step forward and state that I think this video was shot at 720p

that makes a HUGE difference in terms of aliasing and moire

check "brown vs green" here:
http://vimeo.com/channels/176695
it was shot with totally different glass (vintage primes), but you can use it to extract some conclusions, because:
* it was shot without a tripod
* it was shot using sharper glass
both of which should create more visible aliasing/moire artifacts
if you find, as I do, that this footage is cleaner, then the video you posted has some faults that are not intrinsic to the camera (and, again, my guess: 720p)
 
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