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Canon GL Series DV Camcorders
Canon GL2, GL1 and PAL versions XM2, XM1.


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Old November 14th, 2003, 06:47 AM   #1
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True 25p on XM-2 (GL2 PAL)?

Ok, so here's a discussion that has been going on on European boards for a while. It seems as if by switching the shutter speed on the XM-2 (the PAL version GL-2) to 1/25 while still in interlace mode will give you a true 25p image. To illustrate this I have these pictures online:

http://www.drachenauge.de/XM2-1-25.jpg

http://www.drachenauge.de/XM2-1-50.jpg

I think the difference is obvious. The problem in outdoor conditions is that you need a lot of ND filters because so much light is caught on the CCD. However, the look is great and nobody can tell me how it is technically achieved. Is this a true progressive mode?

Jan
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Old November 14th, 2003, 08:19 AM   #2
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The 1/25 image still isn't a true progressive image but due to the slower shutter speed the blur is enough that the interlacing appears to blend almost entirely. The 1/25 image sure does look better in the still shot and you will get a nice filmic look from the video as long as there isn't any fast action in the scene.

Are those shots yours, if so I like the lighting, it's quite eyecatching.
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Old November 14th, 2003, 08:29 AM   #3
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Sorry to say that the pictures are not by me but by a colleague. I don't think the blurring explanation does the job - the girls on the 1/25 frame are not blurred at all and still there are no interlace artifacts on them.
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Old November 14th, 2003, 09:02 AM   #4
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It could be a result of the 25fps and the 1/25 shutter speed being equal. The bottom line is it is still interlaced which is evident from the lines in the 1/25 shot. If it was true progressive there wouldn't be any lines at all.
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Old November 14th, 2003, 09:29 AM   #5
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I heard from someone else who saw these very pictures that since the only lines that exist are red it might well be an artifact of the DV compression.
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Old December 21st, 2003, 05:31 PM   #6
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" so here's a discussion that has been going on on European boards for a while "

Jan, what is the link to the european board ? Thanks
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Old December 21st, 2003, 07:17 PM   #7
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Progressive captures 1 frame at a time; frame mode captures 2 fields at almost the same time via rapid shutter and interpolation. Progressive is "cleaner."
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Old December 21st, 2003, 07:57 PM   #8
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Anyone know for sure, what settings on the XM2 will get the best "film look". i mean, shutter speed, exp, and so on?

Is it frame mode with 1/25 shutter? i supose it depends a lot on light and so on... anyone that has tested all modes, and played around on the xm2 a lot have a final thought on which gives the best look?

Thanks
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Old December 22nd, 2003, 08:37 AM   #9
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<<<-- Originally posted by Charles King :
Jan, what is the link to the european board ? Thanks -->>>

The discussion I followed was in German so it probably won t be helpful to many of you but here it is:
http://216.127.95.21/47332
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Old December 22nd, 2003, 08:44 AM   #10
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Thanks Jan
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