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August 3rd, 2004, 08:55 AM | #1 |
New Boot
Join Date: Jul 2004
Location: Blackwood, Wales
Posts: 16
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Confused beginner needs education
Having gone way over the top and ordered an XL1s ( my excuse is that I've got a range of L Glass) I'm confused by zoom ratios and CCD size. The actual lens focal length has a multiplier of 7.2 to give a 35mm equivalent , what is throwing me is the difference between a single CCD and a 3 CCD device. I have it in my mind that a single CCD (other than Foveon) uses a Bayer transform where a block of 4 pixels (R,B,G,G,) produce a single colour pixel, whereas in a 3 CCD device each pixel is effectively producing a colour pixel. the question is really whether a 300,000 pixel 3 CCD image is the equivalent to a 1 megapixel single CCD or something in between?.
Can anyone stop my brain hurting with an answer or a link? |
August 3rd, 2004, 09:07 AM | #2 |
RED Code Chef
Join Date: Oct 2001
Location: Holland
Posts: 12,514
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John: it doesn't matter, the end quality is what counts. You
bought a great camera! You are right that a single chip uses a bayer and a 3 CCD camera does not. How this translates into resolution and whatnot differs from camera to camera and is of no real interest to me personally. The 7.2 magnification is only with the EF adapter and the EF lenses. I'm not sure how the lens marking translates to 35mm numbers. Zoom is just the distance the lens can travel from the minimum focal length to the maximum. It is not the same as a microscrope or telescope for example.
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August 3rd, 2004, 05:31 PM | #3 |
New Boot
Join Date: Jul 2004
Location: Blackwood, Wales
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Thanks Rob- I've been trying to clarify in my mind what I'm asking and I think this might be the question-
If I take a photograph of an object with a 200mm lens on full frame DSLR such that the object fills the frame, what sort of focal length would fill the frame of an XL1s (from the same distance)- when I get the XL I'll be able to try it but until then I wonder if the video will get the same sort of shots as I get on still digital? John |
August 3rd, 2004, 05:38 PM | #4 |
Warden
Join Date: Mar 2002
Location: Clearwater, FL
Posts: 8,287
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About a 28mm lens on the XL1 is equal to a 200mm lens on 35mm.
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August 4th, 2004, 08:10 AM | #5 |
New Boot
Join Date: Jul 2004
Location: Blackwood, Wales
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Thanks for replies - since my XL1s arrived this morning I'll be able to experiment happily and send my ignorance to the XL1s forum
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August 5th, 2004, 06:28 AM | #6 |
RED Code Chef
Join Date: Oct 2001
Location: Holland
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Have fun John!
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