Short film shot using mini35 + Zeiss Superspeeds - Page 2 at DVinfo.net

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Old June 10th, 2006, 06:33 AM   #16
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Quote:
Originally Posted by Stephan Ahonen
I still think it's a possibility that since this was a film lens, the color fringing we're seeing is in a wavelength that film is not as sensitive to as a CCD, so the manufacturers of the lens didn't get rid of the CA at that wavelength.
I don't think it's the film lens, these have been used on other CCD cameras without this problem and they're made to a standard way beyond any of the lenses used on a 1/3" camera (unless you've got a faulty film lens). However, you'd probably get an CA effect like that if you used a film lens without using an optical adapter that corrected for the JVC's optical block.

It's either a problem within the optics of the the Mini 35 (assuming you're not using the stock JVC lens, but the Mini 35 with it's own lens for the JVC), the lens on the JVC (if you are using the stock lens) or the optical block/CCDs of the JVC camera.
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Old June 10th, 2006, 10:58 AM   #17
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Originally Posted by Paolo Ciccone
Thanks you very much Miklos. BTW, I'm in Santa Cruz, if you need a second camera you just have to ask :)

The images looked great, BTW. Nice look. When do we get a chance of seing the movie, looks hilarious!
Good to know Paolo and thanks for your compliments. I'm actually heading down to the belly of the beast (a.k.a LA LA Land) from the Bay Area. Are you interested in working down there at all as second camera?

The post is out of my hands, but they tell me they will crank on it and have the film cut in a month or so. Then it's on to festivals - the usual. It's unfortunate that the public doesn't get to see some of these shorts, unless a small percentage of them goes to festivals (and the film gets in).
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Old June 10th, 2006, 11:00 AM   #18
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Originally Posted by Nate Weaver
A gaffer I was on a job with with the HD100/Mini rig rated the combo at 50ASA with Cinegamma on.

That's nothing to sneeze at.
Is that a typo? Surley, you don't mean 50 ASA is good?... (I know.. "don't call me Shirley" :-)

I would rate it at more like 120-160 ASA.
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Old June 10th, 2006, 11:01 AM   #19
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Quote:
Originally Posted by Miklos Philips
Good to know Paolo and thanks for your compliments. I'm actually heading down to the belly of the beast (a.k.a LA LA Land) from the Bay Area. Are you interested in working down there at all as second camera?
Count me in. I worked in LA a few times, I can drive from SC to LA in 5 hours with all my gear, without breaking too many laws ;)
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Old June 10th, 2006, 11:16 AM   #20
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Quote:
Originally Posted by Brian Drysdale
I don't think it's the film lens, these have been used on other CCD cameras without this problem and they're made to a standard way beyond any of the lenses used on a 1/3" camera (unless you've got a faulty film lens). However, you'd probably get an CA effect like that if you used a film lens without using an optical adapter that corrected for the JVC's optical block.

It's either a problem within the optics of the the Mini 35 (assuming you're not using the stock JVC lens, but the Mini 35 with it's own lens for the JVC), the lens on the JVC (if you are using the stock lens) or the optical block/CCDs of the JVC camera.
My guess is that it really boils down to either the relay system in the mini35 or the optical block in the camera. I had the same reaction when I saw it: it couldn't possibly be the lenses. I shot with these very same lenses but on a different rig and no CA.

BTW: I know these may have been posted here elsewhere, but here are two very good articles/ info on Chromatic Aberration for those inclined to learn more about it :

http://en.wikipedia.org/wiki/Chromatic_aberration Wiki

http://www.vanwalree.com/optics/chromatic.html - a great piece by Paul van Walree
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Old June 10th, 2006, 05:23 PM   #21
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And an article from Canon: http://www.usa.canon.com/industrial_...WhitePaper.pdf
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Old June 11th, 2006, 10:38 PM   #22
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Noise/Compression

Milkos: I've read reports from other Mini35 users (such as Nate Weaver) that the HD100-Mini35 Combo produces a lot of noise/grain to the point where it no longer looks good in HD. Also Barry Green noted that the preproduction model they tested had MPEG compression echoes when using the Mini35. Did you notice either of these problems? The frame grabs look very nice and every bit as clean as shooting with just the stock lens.
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Old June 12th, 2006, 02:04 PM   #23
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Originally Posted by Chad Terpstra
Milkos: I've read reports from other Mini35 users (such as Nate Weaver) that the HD100-Mini35 Combo produces a lot of noise/grain to the point where it no longer looks good in HD. Also Barry Green noted that the preproduction model they tested had MPEG compression echoes when using the Mini35. Did you notice either of these problems? The frame grabs look very nice and every bit as clean as shooting with just the stock lens.
Did not notice "a lot of noise/ grain" at all. In only one instance did I notice something very strange going on, when using the 300 MM Canon. It was of course a much lower quality lens than the Zeiss kit. It did have a lot of noticable noise in the brighter (mostly white) areas. It freaked us out, not knowing what the heck it was. "We'll fix it in post." ! I wrote it off as some lens anomaly doing it with the mini35 rig/ ground glass/ MPEG compression. In any case it the end it was acceptable and I love the compressed look of the 300 mm shooting down the sidewalk.

Here's a full rez (720) screengrab from the shot (density corrected to pull it up for computer displays, but no other correction - and was saved as a PNG, not a JPEG so no more noise is introduced) - it may take a while to load, so patience is reuqired (1.23 MB):

http://www.pointzeropictures.com/video/Chase.png

I kind of like the grain, as it's more "film-like".
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