DV Info Net

DV Info Net (https://www.dvinfo.net/forum/)
-   Sony HVR-A1 and HDR-HC Series (https://www.dvinfo.net/forum/sony-hvr-a1-hdr-hc-series/)
-   -   HC1/HC3 CMOS Sensor question (https://www.dvinfo.net/forum/sony-hvr-a1-hdr-hc-series/69282-hc1-hc3-cmos-sensor-question.html)

Prech Marton June 10th, 2006 02:56 PM

HC1/HC3 CMOS Sensor question
 
Hi!

I have read a Sony document (a pdf file) that says, these camcorders
doesn't have a built in ND filter, because the cmos sensor has
a wider dynamic range of exposure than ccd-s.

My question is this true? I know, hc1/hc3 have not so good lowlight
capabilities, but i film outside in nature with enough light.
So i have better dynamic range? Every cloud has detail, nothing
is overexposured when in bottom of the picture are darker trees?

I've seen a few hc1 sample video, but i can find the answer.

thx
Marton

Stu Holmes June 10th, 2006 05:55 PM

i'm pretty sure that the HC1 and A1 both have internal ND filters that flip into the optical path when the light levels rech a certain value.
Optimum quality is acheived at a physical aperture of f4 so beyond that ND filters are used to control increasing light levels (they're very small filters) until it gets TOO bright and the iris closes down almost completely.

Andre De Clercq June 11th, 2006 08:27 AM

HC3, and I think HC! too, has an auto shutter function. When set "on" it causes the shutter speed to go up, instead of the iris closing down, when scenes get too bright(beyond the internal ND reach). This way, soft images caused by diffraction are avoided.

Mikko Lopponen June 12th, 2006 03:24 AM

They also use the wider range of cmos so that they won't have to close the aperture as soon. The camera keeps it at f4 as long as possible.


All times are GMT -6. The time now is 06:50 PM.

DV Info Net -- Real Names, Real People, Real Info!
1998-2024 The Digital Video Information Network