3CCD SD vs the HV20's CMOS chip - Page 2 at DVinfo.net

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Canon VIXIA Series AVCHD and HDV Camcorders
For VIXIA / LEGRIA Series (HF G, HF S, HF and HV) consumer camcorders.


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Old August 15th, 2007, 08:20 PM   #16
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Quote:
Originally Posted by Robert Ducon View Post
Steve, congrats!

I own the same setup - achromat as well. I found a spacer helps, but it depends on what lenses you're using with your setup. What lenses will you be using?
Hello Robert. The only lens that I have to work with at the present time is a Nikon (Nikkor) 50mm f1.4. Soon I'd like to get a decent telephoto and maybe a wide angle.

What lenses are you using with the spacer?

When I finally get the Achromat, I need to sit down and read all the notes on the "Cinevate forum" about using the HV20 with the Brevis.
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Old August 27th, 2007, 06:34 PM   #17
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Single sensor artifacts

One disadvantage of the 1 chip CMOS sensors is the sequencial scan from top to bottom. Since the lines at the top are captured earlier than the lines at the bottom you can get some interesting distortion.

In all fairness, this does not show up under most shooting conditions.

Two examples under which the distortion artifacts are very obvious are:
1. Filming out the side window of a car. Telephone poles will be slanted. You may not care about this but be sure to force the camera to a 1/60 shutter speed to minimize the effect.

2. If the camera is moving up and down in angle and this is more than the OIS can completely take out, you get some of the image compressed and some of the image expanded and since this happens differently on every frame the effect is very obvious and very distracting. Image stabalization won't help you here. The worst case I have run into on this is taking video looking our the side of a small boat/ship when there was a little rolling motion. The video was completely unusable, even when down sampled to SD. Obviously, the effect is much worse the more you zoom out under these conditions.

Rick
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Old August 28th, 2007, 07:58 PM   #18
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For me, the advantage of shooting in HDV, then downconverting to SD during editing is that, because the resolution of the HD is higher, I can crop and correct framing mistakes without the typical visible loss of resolution when cropping SD.

HD has made my poor sense of composition much finer...
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Old August 29th, 2007, 03:27 AM   #19
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Quote:
Originally Posted by Rick Llewellyn View Post
One disadvantage of the 1 chip CMOS sensors is the sequencial scan from top to bottom. Since the lines at the top are captured earlier than the lines at the bottom you can get some interesting distortion.

Rick
"Some interesting distortion" you can get from 3CCD camcorders also:



Read more in Wolfgang Winne blog.
Serge Victorovich is offline   Reply
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