[rollei_list] Re: Rolleiflex 35mm Cameras
- From: CarlosMFreaza <cmfreaza@xxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Tue, 10 Nov 2009 12:35:32 -0300
Eric, I showed you a real DOF calculator for the real photographic
world that I have used a lot of times with constant results for
photographs that I can also show, this the practice of photography, be
happy with your theories.
Carlos
2009/11/10, Eric Goldstein <egoldste@xxxxxxxxx>:
> Read and learn, Carlos:
>
> http://www.normankoren.com/Tutorials/MTF6.html#DOF_focal_length
>
> http://www.luminous-landscape.com/tutorials/dof2.shtml
>
>
> Eric Goldstein
>
> --
>
> On Tue, Nov 10, 2009 at 9:59 AM, CarlosMFreaza <cmfreaza@xxxxxxxxx> wrote:
> > I'm afraid you are wrong Eric, DOF is purely a function of aperture
> > for a given lens (and given frame size), but if the lens focal length
> > changes the DOF also changes if keeping constant f stop and circle of
> > confusion size . You could play with this DOF calculator changing only
> > the lens focal length and you'll see the way the real DOF area also
> > changes:
> > http://www.dofmaster.com/dofjs.html
> > Carlos
> >
> > 2009/11/10, Eric Goldstein <egoldste@xxxxxxxxx>:
> >> It can be argued that DOF is purely a function of aperture and not FL.
> >>
> >>
> >> Eric Goldstein
> >>
> >> --
> >>
> >> On Tue, Nov 10, 2009 at 9:32 AM, CarlosMFreaza <cmfreaza@xxxxxxxxx> wrote:
> >> > Well, "any" camera is a term general too much. DOF has to do first
> >> > with the lens focal length and the frame size and the circle of
> >> > confusion size you consider acceptable and second with the f stop; you
> >> > could stop down a 300mm lens for a 6x9 format at f11 or 16 (to say
> >> > something) and you could still have more deeper DOF with the Rollei 35
> >> > at f3.5, my point was that the Rollei 35 Tessar has a reasonable DOF
> >> > and sharpness even wide open if you focus close to your desired
> >> > focusing point, in other words, it is not necessary a telemeter under
> >> > these conditions, perhaps this was not the topic central axis but it
> >> > has to do with some messages I read in the thread.
> >> >
> >> > BTW, the "universal" camera does not exist yet, if you know your
> >> > tools, you also know where and why to use them.-
> >> >
> >> > Carlos
> >> >
> >> >
> >> > 2009/11/10, Marvin <marvin0@xxxxxxxxxxxxxx>:
> >> >> I think you missed the point Carlos, it's possible to stop the lens
> >> >> down and
> >> >> have a large depth of field with just about any camera, but that doesn't
> >> >> afford the individual much control. That's the problem with the 35.
> >> >> Marvin.
> >> >>
> >> >> -----Original Message-----
> >> >> From: rollei_list-bounce@xxxxxxxxxxxxx
> >> >> [mailto:rollei_list-bounce@xxxxxxxxxxxxx] On Behalf Of CarlosMFreaza
> >> >> Sent: 10 November 2009 17:01
> >> >> To: rollei_list@xxxxxxxxxxxxx
> >> >> Subject: [rollei_list] Re: Rolleiflex 35mm Cameras
> >> >>
> >> >> I rarely had problems guessing the distance with the Rollei 35, these
> >> >> two samples were taken during a travel, with the Tessar wide open, 3,5
> >> >> 1/30 shutter speed and camera hand-held, the film was a Kodak Ultra
> >> >> 400. The DOF is still deep at f 3.5 and the camera light meter worked
> >> >> right.
> >> >>
> >> >> http://www.flickr.com/photos/itarfoto/1433112977/
> >> >>
> >> >> http://www.flickr.com/photos/itarfoto/1456649900/
> >> >>
> >> >> Carlos
> >> >> ---
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