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Photography > Photography > Re: Auto-focus ...
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Re: Auto-focus on digital SLRs.

by Pat <groups@[EMAIL PROTECTED] > Feb 23, 2008 at 06:23 AM

On Feb 22, 3:41=A0pm, "Ali" <m...@[EMAIL PROTECTED]
> wrote:
> It's strange that the 'strobe thing' you experienced (which is AF
assist)
> didn't get a focus lock.
>
> I would be interested to know what lens you were using and how far away
yo=
u
> were from the subject.

Why?  It happens all the time in low light situations.  That's why the
lenses have a switch to shut off the AF.  Tokina even makes lenses
that you pull the focus ring towards you and overide the AF (which is
nice).  If you haven't experienced the joy of AF that can't find a
focus point, you haven't used your camera enough.

Sometimes you need to throw on a flash just for the IR focusing.


>
> "Steven Green" <steven.gree...@[EMAIL PROTECTED]
> wrote in message
>
> news:qfGvj.259$Hd.114@[EMAIL PROTECTED]
>
>
>
> >> When it hunts (zooms in and out), what are you photographing at the
> >> time? An image with very little contrast? =A0A low light shot? =A0Is
th=
e
> >> subject moving?
>
> >> Also, what focusing mode are you using? =A0AI Servo, AI Focus or One
Sh=
ot?
> > I was on One shot at the time.
>
> > In this case it was a rather low light shot of my dog laying on a
sofa.
> > Indoors with lamp lighting. I don't think he was moving at the time. I
> > think I tried the flash at the time and it did the strobe thing and
> > couldn't make up its mind.
>
> > He is a rather brown dog with a dark face. I think he has rather good
> > contrast including the sofa.- Hide quoted text -
>
> - Show quoted text -
 




 2 Posts in Topic:
Re: Auto-focus on digital SLRs.
Pat <groups@[EMAIL PRO  2008-02-23 06:23:00 
Re: Auto-focus on digital SLRs.
"Ali" <me@[E  2008-02-23 18:37:05 

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tan12V112 Tue Jul 8 23:19:46 CDT 2008.