[Elphel-support] Elphel 353 - Question about Focus

[David Coto H.]

Hi Oleg,

My comments below.
Thank you.

On 01/21/2015 01:54 PM, Oleg wrote:
> Hi,
>
>     *Lens:* E3Z4518CS-MPIR
>
>     We haven't been able to get the focus to show the cards as sharp
>     that with the Sanyo cameras.
>
>     The cards are a 124cm from the camera, and with the Sanyo ones we
>     are using a Pentax 5-50mm lens.
>     Any advice or recommendation you may have to help us out with this
>     project will be really appreciated.
>
>
> When the focus is "the best" - is the focusing ring at its extreme 
> position?
/At "the best" it is not at the extreme position./
> If yes:
> a. ideally you need to increase the sensor's distance from the lens by 
> adjusting the sensor's plate position (1-2 mm probably) in the front end.
> or
> b. decrease the working focal length (wider field of view) - rotate 
> the ring towards W until you get the best focus.
> c. you can also try closing the iris a little to increase the depth of 
> field.
>
> If no, then a better lens should be tried probably.
>
> What's the image quality?
/JPEG 92%/
> frame dimensions?
/1280x720 - 25fps/
>
> Best regards,
> Oleg Dzhimiev
> Electronics Engineer
> phone: +1 801 783 5555 x124
> Elphel, Inc.


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