Interesting!
Is this the case with DVCPRO50 as well?
regards
Fredrik B
----- Original Message -----
From: <TCurren@xxxxxxx>
To: "Avid-L Members" <avid-l@xxxxxxxx>
Sent: Sunday, June 30, 2002 7:13 AM
Subject: IMX shootout
> One of my clients (Road Rules) has been sold on the IMX format for the
> next season. They asked us to check it out. A local rental house shot some
> footage and brought a deck in for us to check. I commented on how soft it was
> and they were quick to point out that they were using the "image
> stabilization" feature of the camera.
>
> I then loaded some green screen footage into the Symphony to test it's
> ability to key. Again I could detect the softness that prefiltering causes.
> It is always noticeable in hair where there are a lot of high frequencies and
> sharp rise times.
>
> We were using Sony's $40,000 IMX deck which plays back, beta, Digibeta,
> SX and IMX. It only records IMX. I wanted to test it's playback of other
> formats so I put a BetaSP field tape in and digitized bars from it. I
> digitized the same bars from the same tape in my A500. When viewed in blue
> gun mode on the monitor, I could see that the IMX version was a little
> noisier. The processing cards must not be of the same caliber as the A500.
>
> We weren't really comparing "apples to apples" so to speak, so the rental
> company went back and set up a Digi, BetaSP and IMX camera side by side and
> shot a green screen test. They returned accompanied by 2 Sony reps. In this
> case the digi was clean, the IMX was noisy and the BetaSP was noisier. To be
> honest, the BetaSP was noisier than usual and I suspect the camera may have
> been older with worn heads.
>
> In testing the Ultimatte key, I noticed that the noise in the matte prior
> to cleanup was actually little squares instead of the usual grain.
> Interesting compression artifact. It did key well, but the softness compared
> to digi was very noticeable. Even the BetaSP was sharper in the highlights.
>
> The green screen model had long hair with space between her hair and
> head. This area was basically black. I cranked up the video and could see
> details in the Digi and the Beta SP but the IMX was just black. Everything
> else was gone. We then took the test to daVinci. The colorist was able to
> match the Digi and the BetaSP without a problem. He spent a while trying to
> get the IMX to match, but the colorimetry was too different. I would guess
> this is a camera issue, but with prefiltering and compression, I can't be
> positive.
>
> The colorist pointed out one other interesting artifact. In a dark
> hallway scene, when he brought the picture up to viewable levels, the blacks
> became very blocky. It looked like webcam.
>
> It is too bad that Sony feels compelled to force this down our throats as
> a replacement for BetaSP. I realize they have a bigger master plan of having
> all their equipment networked with data streaming, but does quality have to
> be a victim of that?
>
> Terence Curren
> Tcurren@xxxxxxxxxxxx
> Alpha Dogs, Inc.
> Burbank, Ca
>
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