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Old July 29th, 2005, 12:42 PM   #1
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Lens Question

OK...here is the question. Lets say from a distance of 20 feet two camcorders are recording the same image. Both are zoomed in as tight as possible. One cam is the Cannon GL-2 and the lens is the standard 20x with the spec. of 4.2 - 84mm. The second cam is the JVC 5000 with the Cannon 16X lens with the spec. of 7 - 112 mm.

Which cam will show the largest image of our tiny subject?

Thanks in Advance!
Ron
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Old July 30th, 2005, 01:37 AM   #2
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The JVC will
EDIT Sorry everyone else is right.Don't know why I was thinking the JVC was 1/3".

Last edited by Jack Smith; July 30th, 2005 at 10:50 AM.
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Old July 30th, 2005, 02:03 AM   #3
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What's the image magnification factor on a 1/2" chipper like the JVC 5000 cameras? I would have figured the 1/4" chips on the GL would give a big enough magnification factor to give it longer reach even with the smaller glass. Good question though!
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Old July 30th, 2005, 03:37 AM   #4
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I think the easiest way to do these comparisons is to convert both to 35mm SLR equivalents. The Canon GL2 with 1/4" CCDs has a conversion factor of 10.9 and the 1/2" JVC is 5.5. At the maximum zoom of each of the the lenses:
GL2: 84mm x 10.9 = 915mm
DV5000: 112mm x 5.5 = 616mm
So the GL2 will show the largest image, by far.
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Old July 30th, 2005, 09:24 AM   #5
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Any one have these two cams that can set up an actual test...seems like we have two different answers....

Thanks!
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