[Elphel-support] Flash on a two camera system

[Andreas Bean]

Andrey,

I understand.

I see two options:

1) turning leds always on
2) adding a mechanical shutter

Has anyone added a mechanical shutter to an 353 before?

Andreas


Andrey Filippov schrieb:
>
> Andreas,
>
> that depends on what are you trying to capture. If ERS distortion is
> not a problem in your case, and the LED is just to provide more light,
> not limit the exposure - yes, you can do that (same as if LEDs were
> always ON for the camera). If on the other hand, you need LED as a 
> "snapshot shutter" than you have to reduce ambient light or increase
> the LED brightness and simultaneously add neutral filters to the
> camera lens.
>
> Andrey
>
> On Wed, Apr 13, 2011 at 1:32 PM, Andreas Bean <office at beanbox.com
> <mailto:office at beanbox.com>> wrote:
>
>     Andrey,
>
>     I can't set the exposure time even near 67ms. We have difficult
>     lighting
>     conditions. For example, we have an indoor room with a bright window
>     where the cam is moving.
>     Setting the exposure time to 72ms will give me a blurred image of the
>     window. Anything else may be sharp due to the fact that it is only
>     lighted for 5ms.
>     Is the only option to set the exposure time to 5ms and turn the
>     leds on
>     for 72ms?
>
>     Andreas
>
>     Andrey Filippov schrieb:
>     > Sebastian,
>     >
>     > Most consumer cameras with ERS have additional mechanical
>     shutter - it
>     > opens 1/15 sec (if they used the same senor) after the sensor starts
>     > exposing the first line, readout starts after the shutter
>     closes. When
>     > using the bright LED it the LED on state is virtually the same as
>     > mechanical shutter open
>     >
>     > Andrey
>     >
>     >     ERS (Electronic Rolling Shutter) has been used in all
>     consumer as well
>     >     as professional CMOS based camera systems to date.
>     >
>     >
>
>
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