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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 May 4th, 2006, 03:21 PM   #1
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Manual exposure

In manual mode the iris can be closed to F9.5 The next stop is close.
In bright conditions 9.5 is not enough to retain say 1/50 shutter.
Now, in auto mode, when I press the exp.lock button I see iris levels all the way down to F22. How come I can't do this manually?
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Old May 4th, 2006, 03:38 PM   #2
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Per, I cannot give you a straight answer to your question. However, you'd want to avoid closing the iris much further than f/9.5 due to diffraction effects anyway. Instead, use ND-filters - if necessary an additional one to the one built into the stock lens. Here's an interesting article on iris-induced diffraction effects:

http://www.luminous-landscape.com/tu...fraction.shtml

Incidentally, I've been thinking about buying a variable ND-filter. Although expensive, such a filter would enable me to shoot at the aperture/shutter speed of choice most of the time, independent of lighting conditions. Does anyone have experience with variable NDs?

HTH,

Ron
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