[Leica] Image Circles

[roark.paul at gmail.com (Paul Roark)]

On Wed, Jan 16, 2019 at 9:38 AM Ken Iisaka <ken at iisaka.com> wrote:

> ...
>
> The biggest constraint is the diameter of the mount which is pretty small.
> If the position of the exit pupil is close to the mount, you may not
> experience vignetting due to the mount...


The exit pupil is about 30mm away from the mount face.

BTW, to see what this lens can do in terms of our moon and the moons of
Jupiter, see http://www.paulroark.com/SYV-Skies.html.  The first image is
with the 135.  The first link under the first image is an enlargement of
Jupiter's moons from the top image and the 135.  (The second link -- our
moon by itself -- in not the Leica; it's the Canon 70-200 f/4 L zoom.)

Paul
www.PaulRoark.com




>
> On Wed, Jan 16, 2019 at 08:58 Bob Adler via LUG <lug at leica-users.org>
> wrote:
>
> > I think you?re right on Paul. There is a thread on the GetDPI Medium
> > Format forum that concludes exactly this with good examples...
> > Thanks,
> > Bob
> >
> > Bob Adler
> > www.robertadlerphotography.com
> >
> > > On Jan 15, 2019, at 5:51 PM, Paul Roark via LUG <lug at 
> > > leica-users.org>
> > wrote:
> > >
> > > I think it's safe to assume it will not.  Leica is not about to built
> the
> > > best, most compact lens for a "35" film/sensor size (minimum image
> circle
> > > about 44mm) that would cover the 55mm image circle you need.  All else
> > > being equal, the larger the circle the lower the quality/$.
> > >
> > > Paul
> > > www.PaulRoark.com
> > >
> > > On Tue, Jan 15, 2019 at 4:22 PM Robert Adler via LUG <
> > lug at leica-users.org>
> > > wrote:
> > >
> > >> Hi All,
> > >> I need some technical help please. I'm trying to find what the size of
> > the
> > >> image circle on both the 75mm f/2 ASPH and the 135mm f/3.4 ASPH. The
> > real
> > >> question is will the image circles of these lens cover a sensor size
> of
> > >> 43.8mm X 32.9? Is the image circle different at f/2 than f/11?
> > >> Thanks for your help,
> > >> Bob
> > >>
> > >> Bob Adler
> > >> www.robertadlerphotography.com
> > >> *"Capturing Light One Frame At A Time"*
> > >>
> > >> _______________________________________________
> > >> Leica Users Group.
> > >> See http://leica-users.org/mailman/listinfo/lug for more information
> > >>
> > >
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> >
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>
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