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-   -   Optimal aperture setting for XH A1 (https://www.dvinfo.net/forum/canon-xh-series-hdv-camcorders/237733-optimal-aperture-setting-xh-a1.html)

Richard Hunter June 29th, 2009 06:25 PM
Quote:
Originally Posted by Doug Bennett (Post 1164857)
Tom to simplify:

You want to shoot at at 2.8

To do so you would need to set shutter at 1/1000

Are you going to shut down the lens or live with the stutter?
I would prefer to add an ND filter (or 2) to cut down the light and try to get the shutter speed to 1/50s or so.

Richard

Tom Hardwick June 30th, 2009 12:49 AM
Quote:
Originally Posted by Doug Bennett (Post 1164857)
Are you going to shut down the lens or live with the stutter?
Stop down the lens. Or screw in an ND filter to add to the in-builts. If your camera allows it, use negative gain.

Josh Glowicki July 5th, 2009 12:08 AM
just to clarify, what is negative gain?

Richard Hunter July 5th, 2009 02:24 AM
Quote:
Originally Posted by Josh Glowicki (Post 1167283)
just to clarify, what is negative gain?
Hi Josh. Gain is used to boost the analogue sensor signal before the A-D conversion stage. Gain values of +3dB, +6dB, +12dB are common on many video cameras. Without any boost the gain is 0dB. If the signal is cut instead of boosted, that is negative gain, for example -3dB. To give you a feel for the numbers, if the signal is cut by half, which is like losing one stop of light, the gain would be -6dB.

Richard


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