Image Warping at Z20 or less at DVinfo.net

Devin S Kelley · February 22nd, 2004, 02:30 AM

Has anyone experienced warping on the sides when zooming to 20 or below on the DVX100? Or is this normal? With the anamorphic lens the warping is much more apparent, and I at first thought it was the anamorphic adapter causing it to warp, but after some testing it actually is happening with the normal lens, just less pronounced. Do I have a defective camera?

Jan Crittenden Livingston · February 22nd, 2004, 07:59 AM

Devin,

You don't mention what monitor you are using. You may have a pincushion distortion on your monitor and thus it is leading you to this conclusion. Try a different monitor or use the LCD to make the judgment.

Let us know,

Jan

Jeff Donald · February 22nd, 2004, 08:14 AM

It could also be barrel distortion which is normal for wide angle lenses. Note also that the DVX100 has a wider than usual zoom lenses (when compared to competitors) as standard equipment.

Devin S Kelley · February 22nd, 2004, 09:31 AM

Thanks for the responses.

I'm actually seeing the distortion in the viewfinder, on the LCD and when watching it on tape. And again, the warping occurs even without the anamorphic adapter, just on a less noticable level because it's not being stretched horizontally.

Anyone else got ideas? Thanks, guys!

Jeff Donald · February 22nd, 2004, 09:50 AM

Devin, it sounds like what you have is barrel distortion. It is present in nearly all wide angle lenses. You can read an explanation and see an example here. Only rectilinear wide angle lenses will show no distortion. Rectilinear wide angles are very expensive to produce and are fixed focal length lenses (they do not zoom). If you post an example of the distortion, it will be easy to confirm.

Ken Tanaka · February 22nd, 2004, 12:39 PM

Devin,
This is normal for that camera's lens and, as Jeff pointed out, for all conventional wide-angle lenses such as the DVX100's. The effect will be most pronouced at the lens' widest shot and when nearby objects are at the left and right edges of your frame (ex: sitting in a small room).

That wide-angle lens is one of the camera's attractive features.

February 22nd, 2004, 02:30 AM	#1
Devin S Kelley Tourist Join Date: Feb 2004 Location: Independence, MO Posts: 2	Image Warping at Z20 or less Has anyone experienced warping on the sides when zooming to 20 or below on the DVX100? Or is this normal? With the anamorphic lens the warping is much more apparent, and I at first thought it was the anamorphic adapter causing it to warp, but after some testing it actually is happening with the normal lens, just less pronounced. Do I have a defective camera?

February 22nd, 2004, 07:59 AM	#2
Jan Crittenden Livingston Panasonic Broadcast Join Date: Sep 2002 Location: Secaucus, NJ 07094 Posts: 271	Re: Image Warping at Z20 or less Devin, You don't mention what monitor you are using. You may have a pincushion distortion on your monitor and thus it is leading you to this conclusion. Try a different monitor or use the LCD to make the judgment. Let us know, Jan

February 22nd, 2004, 08:14 AM	#3
Jeff Donald Warden Join Date: Mar 2002 Location: Clearwater, FL Posts: 8,287	It could also be barrel distortion which is normal for wide angle lenses. Note also that the DVX100 has a wider than usual zoom lenses (when compared to competitors) as standard equipment. __________________ Jeff Donald Carpe Diem Search DVinfo.net for quick answers \| Where to Buy? From the best in the business: DVinfo.net sponsors

February 22nd, 2004, 09:50 AM	#5
Jeff Donald Warden Join Date: Mar 2002 Location: Clearwater, FL Posts: 8,287	Devin, it sounds like what you have is barrel distortion. It is present in nearly all wide angle lenses. You can read an explanation and see an example here. Only rectilinear wide angle lenses will show no distortion. Rectilinear wide angles are very expensive to produce and are fixed focal length lenses (they do not zoom). If you post an example of the distortion, it will be easy to confirm. __________________ Jeff Donald Carpe Diem Search DVinfo.net for quick answers \| Where to Buy? From the best in the business: DVinfo.net sponsors

February 22nd, 2004, 12:39 PM	#6
Ken Tanaka Retired DV Info Net Almunus Join Date: Dec 2001 Location: Chicago, IL Posts: 6,943	Devin, This is normal for that camera's lens and, as Jeff pointed out, for all conventional wide-angle lenses such as the DVX100's. The effect will be most pronouced at the lens' widest shot and when nearby objects are at the left and right edges of your frame (ex: sitting in a small room). That wide-angle lens is one of the camera's attractive features. __________________ Lady X Films: A lady with a boring wardrobe...and a global mission. Hey, you don't have enough stuff! Buy with confidence from our sponsors. Hand-picked as the best in the business...Really! See some of my work one frame at a time: www.KenTanaka.com

February 22nd, 2004, 09:31 AM	#4
Devin S Kelley Tourist Join Date: Feb 2004 Location: Independence, MO Posts: 2	Thanks for the responses. I'm actually seeing the distortion in the viewfinder, on the LCD and when watching it on tape. And again, the warping occurs even without the anamorphic adapter, just on a less noticable level because it's not being stretched horizontally. Anyone else got ideas? Thanks, guys!