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Canon XL H Series HDV Camcorders
Canon XL H1S (with SDI), Canon XL H1A (without SDI). Also XL H1.


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Old July 24th, 2006, 10:11 AM   #46
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Lauri,

The suggestion that we name it after your wall wasn't entirely serious but your comment got me thinking about the names of scientists whose work had some bearing on this problem/phenomenon: Newton (drew the first color wheel), Abbe (quantized the dispersive properties of glass which are responsible for CA), Airy (first Astronomer Royal after whom the form of an ideal lens's image of a point is named), Bessel (for the mathematical function which describes the Airy Pattern), Shannon (whose sampling theorem makes digital video possible), Seidel (who came up with a unified way of describing CA, spherical abberation, coma....) and lots more.
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Old July 24th, 2006, 12:06 PM   #47
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There certainly has been a lively response to this concern about the "stock" lens.. some well informed, some bashing, some defensive...

When I first got my H1 last December I tested it with the 20x and the 16x and preferred the 16x primarily for handling reasons. As I wrote then, I found the 20x sluggish and unresponsive and particularly didn't/don't like the OIS. That was, and still is, my opinion.. I sold the 16x with my XL2, but have just ordered another one, again, primarily because of handling.

But, back to the 20x. The fact is that some really nice images have already been made with this lens (some by me, if I do say so myself).. Overall, I'm not as displeased about CA.. and I do believe that much of what is being attributed to the lens is endemic of HDV and 1/3" chips... So, where does that leave us?

In my case, shooting documentaries, mostely handheld, a small amount of CA, or whatever the hell it is, is not really noticeable at all.. For others, especially those who work w/ green screen or want to shoot pristine nature footage at the long end of the lens, it will be a problem..

I remember the American Cinematographer story over 35 years ago about the production of LAWRENCE OF ARABIA - in shooting that film they deliberately chose lenses with chromatic abberations because they wanted the effect of shooting through hot desert atmosphere - and it's a "look" that has been immulated in many non-desert films since.. Pick the tool for the job.

I'm not excusing Canon for the 20x, I too wish there was another HD lens available for this excellent camera. I'm just saying that used in the right circumstances this little box is a pretty good deal for $9000.
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Old July 24th, 2006, 05:10 PM   #48
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Here here, Steven.
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Old July 24th, 2006, 07:47 PM   #49
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Quote:
Originally Posted by A. J. deLange
Lauri,

The suggestion that we name it after your wall wasn't entirely serious but your comment got me thinking about the names of scientists whose work had some bearing on this problem/phenomenon: Newton (drew the first color wheel), Abbe (quantized the dispersive properties of glass which are responsible for CA), Airy (first Astronomer Royal after whom the form of an ideal lens's image of a point is named), Bessel (for the mathematical function which describes the Airy Pattern), Shannon (whose sampling theorem makes digital video possible), Seidel (who came up with a unified way of describing CA, spherical abberation, coma....) and lots more.
and don't forget Murphy.
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Old July 25th, 2006, 12:34 AM   #50
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Murphy is almighty, but don't forget Bayer's pattern and Nyquist's limit.

Here's how I knocked down a burning blue ring of fire with a simple custom preset:

http://www.dvinfo.net/conf/showthread.php?t=72218
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