[Elphel-support] Elphel 353 - Question about Focus
David Coto H.
david.coto at visionaryigaming.com
Wed Jan 21 12:15:14 PST 2015
Oleg,
I will give another try to your suggestions.
But in case that we don't find a solution, what lens willl you recommend
for this?
Thanks in advance.
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?
> 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? frame dimensions?
>
> Best regards,
> Oleg Dzhimiev
> Electronics Engineer
> phone: +1 801 783 5555 x124
> Elphel, Inc.
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