Strange patterns/strobing

[Pyriphlegethon]

Hello wise board members. I have a quick question...

When I shoot things with small detail (ex: narrow tree branches against the sky, repeating horizontal lines on the texture of a wall, blinds) I get weird patterns of distortion. It is horrible on pans and things-- looks very jittery. My vertical detail is set to thin, if this has any bearing on my problem.

I don't know entirely how to explain this, so I'll try to post some pictures if it's not a common problem you all know about.

Thanks

 

[10s]

Re: Strange patterns/strobing

It's sounds like it's the "Moire effect". If so, you have to learn to compose around it. Clothes, patterns, venetian blinds, etc cause it. It's a real pain!!!!! Many shooters get so use to it they become unaware it's there ruining their shot.

Play with your thick & thin settings. & /or detail. I find thick eliminates it best. The best bet is to avoid these situations if possible.

Do a WEB search and there are all sorts of technical articles, web sites about this little trouble maker.

 

[scharky]

Re: Strange patterns/strobing

the moir effect occurs becuase the footage captured in progressive scan is actually higher than what can be displayed safely on an interlaced television. therefore, when composing for television display, you can do one of two things. 1- set your detail to thick, this is in affect bluring your image in the same way that interlaced video is blurred. 2- caputre your image with thin line detail and apply a slight gaussian blur in post. I prefer the second meathod personally because it does not affect footage that does not need to be blurred. I personally don't find it a problem, knowing that the television itself is the limiting factor of how good the DVX footage can look.