Gain Test -- XF 305 native .MXF files from Nick Wilcox-Brown at DVinfo.net

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Canon XF Series HD Camcorders
Canon XF305, XF205 and XF105 (with SDI), Canon XF300, XF200 and XF100 (without SDI).


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Old May 11th, 2010, 10:47 AM   #1
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Gain Test -- XF 305 native .MXF files from Nick Wilcox-Brown

From Nick:

"I have just completed a set of tests of gain settings for XF305, XHG1s and EOS5D Mark II - all of a GretagMacbeth / XRite SG Color chart. The XF305 gain settings were tested from -6 to +33db. +21dB looked very clean while I was shooting it. All files from this camera are pre-production and subject to change."

The download links:

Gain -6dB: http://files.dvinfo.net/samples/CANO...6/AA008501.MXF

Gain +0dB: http://files.dvinfo.net/samples/CANO...o/AA008601.MXF

Gain +3dB: http://files.dvinfo.net/samples/CANO...3/AA009101.MXF

Gain +6dB: http://files.dvinfo.net/samples/CANO...6/AA009201.MXF

Gain +12dB: http://files.dvinfo.net/samples/CANO...2/AA008701.MXF

Gain +18dB: http://files.dvinfo.net/samples/CANO...8/AA008801.MXF

Gain +21dB: http://files.dvinfo.net/samples/CANO...1/AA008901.MXF

Gain +33dB: http://files.dvinfo.net/samples/CANO...3/AA009001.MXF
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Old May 11th, 2010, 10:47 AM   #2
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Gain Test -- XH G1S HDV files from Nick Wilcox-Brown

HDV samples from Canon XH series camcorder (XH G1S) -- the same GretagMacbeth / XRite SG Color chart as above:

Gain -6dB: http://files.dvinfo.net/samples/CANO.../XH_minus3.mov

Gain +0dB: http://files.dvinfo.net/samples/CANO...xh/XH_zero.mov

Gain +6dB: http://files.dvinfo.net/samples/CANO...h/XH_plus6.mov

Gain +12dB: http://files.dvinfo.net/samples/CANO.../XH_plus12.mov

Gain +18dB: http://files.dvinfo.net/samples/CANO.../XH_plus18.mov

Gain +36dB: http://files.dvinfo.net/samples/CANO.../XH_plus36.mov
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Old May 11th, 2010, 10:51 AM   #3
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See this thread: How to view native .MXF files for viewing tips -- the VLC
player is inferior to the free Sony XDCAM Player and other free options.

When commenting about a specific clip, please refer to its file name (8601.MXF, etc.). Thanks,
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Old May 11th, 2010, 11:59 AM   #4
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Very interesting. Chroma noise is filtered out but Luma noise is left in.

Can we match "gain" to an EV (exposure value)?
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Old May 11th, 2010, 02:42 PM   #5
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Quote:
Originally Posted by Don Miller View Post
Very interesting. Chroma noise is filtered out but Luma noise is left in.

Can we match "gain" to an EV (exposure value)?
+21dB is 1000 ISO or very close to it according to my meter. +33 is around 1600, but very noisy. The camera can be customised in 1dB steps.
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Old May 11th, 2010, 03:05 PM   #6
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Very interesting. The only setting I would never use is +33 (blue noise), the other settings look really good. I would like to see them compared to the Canon HDV models.
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Old May 11th, 2010, 03:49 PM   #7
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Glad this was helpful Floris. I have the matching XH (G-1s) files here (also EOS 5D MkII) and will upload them shortly.

For the XH, I have used the default Canon settings as opposed to my favourite preset.

I am sure that Chris will kindly put them on a similar link when he has a moment.
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Old May 11th, 2010, 06:12 PM   #8
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Quote:
Originally Posted by Nick Wilcox-Brown View Post
+21dB is 1000 ISO or very close to it according to my meter. +33 is around 1600, but very noisy. The camera can be customised in 1dB steps.
That seems to put gain 0 at about iso 100. It also suggests the highest acceptable iso is close to the 5DII in video mode. The 5DII having the potential advantage of faster glass.

Is there a higher noise reduction setting?
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Old May 11th, 2010, 08:56 PM   #9
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Quote:
Originally Posted by Nick Wilcox-Brown View Post
I have the matching XH (G-1s) files here and will upload them shortly.
Added to the second post, above. Direct link:

Gain Test -- XF 305 native .MXF files from Nick Wilcox-Brown
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Old May 12th, 2010, 02:23 AM   #10
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Is there a higher noise reduction setting?
Don, there are a lot of options, but the lack of a manual is not ideal + really busy shooting stills and video, so not enough time to experiment.

Nick.
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Old May 12th, 2010, 05:17 AM   #11
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Nick, Chris:

Thank you for sharing these samples.
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Old May 12th, 2010, 06:33 AM   #12
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Nick and Chris, thanks for your effort!

Compared to the XH-Series noise is very fine grain (higher bitrate and 4:2:2 sampling might help the XF) and the registered trademark sign on the Macbeth chart is still readable even at high gain settings. Blue noise seems to start kicking in at around +18dB. I ran your previous clips through some CC tests in FCP and what can I say? I like what I saw!
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