unable fo focus whilet wall

[peterg3]

I am unable to focus white wall on my g3.
If i try to focus any subject on the wall, picture for example everything is ok. I have green box.
But when I try to focus white wall I have blinking
orange indicator. Is it OK?

[PFlor]

peterg3 wrote:
I am unable to focus white wall on my g3.
If i try to focus any subject on the wall, picture for example everything is ok. I have green box.
But when I try to focus white wall I have blinking
orange indicator. Is it OK?


The G3's autofocus system is contrast-based as opposed to Phase Detection used by SLRs. So if you focus on any object that has low contrast (ie. white wall) you will have difficulty doing so.

[Rodenstock]

peterg3 wrote:
I am unable to focus white wall on my g3.
If i try to focus any subject on the wall, picture for example everything is ok. I have green box.
But when I try to focus white wall I have blinking
orange indicator. Is it OK?


It will not focus at the sky,snow,mirror,water etc..
You need at least some vertical contrast.

[FrankG3]

peterg3 wrote:
I am unable to focus white wall on my g3.
If i try to focus any subject on the wall, picture for example everything is ok. I have green box.
But when I try to focus white wall I have blinking
orange indicator. Is it OK?


This link may help you to understand why this happens. It is normal for a passive autofocus camera to behave this way.

http://electronics.howstuffworks.com/autofocus2.htm

[hypokondriak]

Get used to the manual focus option! Unfortunately, auto focus doesn't always work... for this it is good to be prepared.