Anamorphic bending of image?

mickeloaf

mickeloaf

Well-known member
With Anamorphic guide in hand I've been playing with the adapter and have noticed a slight bending of straight edges on my test material (kind of like a bend at the top and bottom of the edge, kinda like a fisheye but not so exagerated).  I didn't notice this with squeeze mode.  

Am I doing something wrong here, or is this just normal behavior when using the adapter?  I didn't catch any mention of this anywhere, so just wondering if it's just me or what..
 
Re: Anamorphic bending of image?

Sounds like normal wide angle behavior to me (the anamorphic is wide angle in one axis). It's absolutely normal distortion - no worries :) (unless it bothers you a lot!).
 
Re: Anamorphic bending of image?

Thanks for the response Shaw. Yeah i wasn't sure if maybe it was an issue of the zoom, or if i put that thing on slightly crooked. I figured it would stretch the image on the horizontal, but didn't think it would cause a bending of a straight edge (for example the edge of a fridge or the corner of a wall).
 
Re: Anamorphic bending of image?

You're seeing barrel distortion. It's happening, as Shaw said, because the anamorphic is actually a wide-angle adapter as well (but only on one axis, the horizontal). Lenses tend to get barrel distortion the wider they get, and barrel distortion taken to the extreme becomes a fisheye effect. The DVX exhibits barrel distortion in and of itself, but very mildly... wide-angle adapters (and the anamorphic) exaggerate the effect.
 
Re: Anamorphic bending of image?

How do people compensate for that? My guess is that you try to compensate by setting up shot's that don't have lots of vertical straight edges. A person wouldn't even notice if it wasn't for the reference lines in the scene.

Thanks for the feedback guys!
 
Re: Anamorphic bending of image?

That's one way; the other way is to not zoom out so far. I think by about Z10 most of the barrel distortion is minimized.
 
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