Archived posting to the Leica Users Group, 2012/09/19

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Subject: [Leica] What Is "Focus Peeking"
From: rgacpa at gmail.com (Robert Adler)
Date: Wed, 19 Sep 2012 06:59:19 -0700
References: <CAAsXt4Pkj9G038-c2oXM-nPCuRB6OnNsGm584xUqnPB1_Ewemg@mail.gmail.com> <CA+3n+_m-NDQtdC3FFTZ8oPR5fWM84qJv+NHC1bPxO46Rs2+Hag@mail.gmail.com>

Thanks Don. PhaseOne backs (newer, IQ models) seem to employ this
technology also. Wonderful for landscapes and tilt.
Best,
Bob

On Wed, Sep 19, 2012 at 1:38 AM, Don Dory <don.dory at gmail.com> wrote:

> Robert,
> Focus peaking is from the video realm.  You can choose your color and the
> level of the peaking effect.  To try it out while waiting for Leica pick up
> a Sony Nex 5 or Nex 7.  As others have mentioned you see the effect on the
> whole screen, it accounts for your depth of field so the effect shows you
> what will be in focus as you stop down fairly effectively.
>
> Caveats would be it is a learned tool much like focusing on ground glass;
> if you turn up the peaking level you can get false positives as the peaking
> color bleeds over into areas that are not really in focus.  Also, if your
> lens doesn't have a crisp transition from out of focus to in focus it can
> be difficult to use; a wide angle like the 18mm Zeiss will show everything
> in focus or a 35 Summicron stopped down to F8 at intermediate distances
> will show most everything glowing in red(or yellow or white).
>
> The plus side is that it will put new life in lenses such as the 75
> Summilux as focus peaking takes into account field curvature so you really
> can focus off center quickly and easily.  Also, with the right adapter you
> can now use any lens in your stable or do macro with your M.
>
> If any of you do decide to go and check out the principle with a Sony Nex
> you will need to use its somewhat ill conceived menu.  In the menu go to
> the lower right option and scroll down, way down until you can set several
> things.  1) allow firing without a lens attached 2) allow focus peaking 3)
> choose a color 4) choose a level of focus peaking.  Also enable manual
> focusing.
>
> Thanks for listening and now back to lurking.
>
> Don Dory
>
> On Tue, Sep 18, 2012 at 10:43 PM, Robert Adler <rgacpa at gmail.com> wrote:
>
> > This sounds very much like the Focus Mask available on the PhaseOne IQ
> > digital backs. Either in Live View or after exposure it highlights the in
> > focus areas based on contrast, as Doug describes. In the PhaseOnes you
> can
> > even adjust the level of contrast to use to show the in-focus mask (my
> > guess is not part of the M offering). I would LOVE to have a back like
> > this...
> >
> >  It's a wonderful feature if you think about it. If your lens is finicky
> > about having to be exactly mated to the body (Noctilux/75 'lux), you
> could
> > live with a little back or front focus. If you could see what was in
> focus
> > with these red lines (let's say the pupil of an eye against the white of
> > the eye), just moving your head until the area you want in focus lights
> up
> > would be terrific. Heck, even if your lens was perfectly mated, you'd get
> > more in focus hits than before at wide open...
> >
> > If that is now available via live view on the EVF, it may well be worth
> the
> > price of admission...
> > IMO.
> > We shall see
> >
> > Bob Adler
> > Redwood City, CA
> > http://www.rgaphoto.com
> >
> >
> > ------------------------------
> > *From:* Robert Baron <robertbaron1 at gmail.com>
> > *To:* Leica Users Group <lug at leica-users.org>
> > *Sent:* Tue, September 18, 2012 2:02:41 PM
> > *Subject:* Re: [Leica] What Is 'Focus Peaking'?
> >
> > I ask because there have been references to the new 'M' camera using
> 'focus
> > peaking' which is something new to me.
> >
> > As are more and more things these days...
> >
> > Thanks,
> >
> > --Bob
> >
> > ==On Tue, Sep 18, 2012 at 3:45 PM, leo wesson <leowesson at gmail.com>
> wrote:
> >
> > > On video?  On my camera, I get a red line when something is in focus.
> > >  Apparently some still cameras use it.
> > >
> > > http://www.luminous-landscape.com/forum/index.php?topic=56246.0
> > >
> > > Leo Wesson
> > > Photographer/Videographer
> > > 817.733.9157
> > > www.leowesson.com
> > >
> > >
> > > On Tue, Sep 18, 2012 at 3:37 PM, Robert Baron <robertbaron1 at 
> > > gmail.com
> > > >wrote:
> > >
> > > > An enquiring mind wants to know.
> > > >
> > >
> > >
> >
> > _______________________________________________
> > Leica Users Group.
> > See http://leica-users.org/mailman/listinfo/lug for more information
> >
> > --
> > Bob Adler
> > http://www.rgaphoto.com
> >
> > _______________________________________________
> > Leica Users Group.
> > See http://leica-users.org/mailman/listinfo/lug for more information
> >
>
>
>
> --
> Don
> don.dory at gmail.com
>
> _______________________________________________
> Leica Users Group.
> See http://leica-users.org/mailman/listinfo/lug for more information
>



-- 
Bob Adler
http://www.rgaphoto.com


In reply to: Message from rgacpa at gmail.com (Robert Adler) ([Leica] What Is "Focus Peeking")
Message from don.dory at gmail.com (Don Dory) ([Leica] What Is "Focus Peeking")