[Leica] Is it just me, or are these new Leica lenses a huge step up?

[hopsternew at gmail.com (Geoff Hopkinson)]

Assuming that the camera and lens are calibrated correctly, this really
comes down to what you shoot and how you do it.
Shoot at longer distances or stopped down more and you may never see a
concern. The same for wide open if your technique is good and the
adjustments good. If you shoot around f/4 a lot and in closer (as I do a
lot) it certainly is a consideration. My new model 35 proved to be well out
of adjustment from new yet I never saw this until I started to use it in
more critical scenarios. It is now adjusted perfectly and is a real joy to
use. From wide open (not often) to stopped well down I just don't think
about this focus shift in my normal use now.


Cheers
Geoff
http://www.pbase.com/hoppyman


On 14 March 2014 07:57, <grduprey at mchsi.com> wrote:

> My 35/1.4 Summilux pre-asph lens works great on my M8.  Have not noticed
> any focus shift.
>
> Gene
>
> ----- Original Message -----
> From: "Nathan Wajsman" <photo at frozenlight.eu>
> To: "Leica Users Group" <lug at leica-users.org>
> Sent: Thursday, March 13, 2014 3:54:31 PM GMT -06:00 US/Canada Central
> Subject: Re: [Leica] Is it just me, or are these new Leica lenses a huge
> step up?
>
> Hi Peter,
>
> I don't have the CV 1.2/35mm anymore. My main lens on the M8 is the
> 2.5/35mm Leica, and I have not noticed any focus shift with it. But as I
> said, maybe I am just not looking for it. I don't doubt that the phenomenon
> exist; I am just saying that it does not seem to be relevant for the kind
> of photography I do.
>
> Cheers,
> Nathan
>
> Nathan Wajsman
> Alicante, Spain
> http://www.frozenlight.eu
> http://www.greatpix.eu
> PICTURE OF THE WEEK: http://www.fotocycle.dk/paws
> Blog: http://nathansmusings.wordpress.com/
>
> YNWA
>
>
>
>
>
>
>
>
>
> On Mar 13, 2014, at 9:36 PM, Peter Klein wrote:
>
> > Nathan: All lenses have focus shift, but some more than others. The
> original 35/1.4 ASPH without the floating elements is one, and it is my
> principal lens on my M8. At f/1.4 and f/2, the RF is accurate. At
> f/2.8-5.6, the actual point of focus is a bit behind where the RF says it
> is. At f/8 and smaller, the DOF covers things. I confirmed this with
> testing, but it was pretty apparent without testing. So if I want to shoot
> it at f/2.8-5.6, I focus a little closer than I actually want. It bothers
> me to have to do it, but the lens is so good otherwise that I put up with
> it.
> >
> > IIRC, you are using the Voigtlander 35/1.2 on your M8. That lens handles
> focus shift in a very sneaky way. As you stop down, the actual focus point
> oscillates back and forth around the point the RF is focused on, but only
> very slightly. You can see it if you pixel peep, but not in real life.
>  When I first tested my 35/1.2 on the M8, I did pixel peep, and I couldn't
> believe my eyes. I repeated the tests, same results. So I asked Erwin Puts
> about it. He confirmed my observations. Erwin said that what the Cosina
> designers did is a less expensive way of minimizing focus shift, but that
> Leica would never do it that way, because there are some other optical
> drawbacks to it (I think involving contrast).
> >
> > So for all practical purposes, your normal M8 lens doesn't have focus
> shift. So you don't notice it.   :-)
> >
> > --Peter
> >
> >
> >
> > > I have never seen any focus shift on my M8 with any of my lenses.
> Perhaps I
> > > don't know what to look for. Heck, I just take pictures.
> > >
> > > Cheers,
> > > Nathan
> > >
> > > Nathan Wajsman
> > > Alicante, Spain
> > > http://www.frozenlight.eu
> > > http://www.greatpix.eu
> > > PICTURE OF THE WEEK: http://www.fotocycle.dk/paws
> > > Blog: http://nathansmusings.wordpress.com/
> > >
> > > YNWA
> >
> >
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> >
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>
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