[rollei_list] Re: Rolleiflex 35mm Cameras
- From: Eric Goldstein <egoldste@xxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Tue, 10 Nov 2009 10:30:54 -0500
It is. Another interesting discussion relative to aperture, DOF and
perceived sharpness:
http://www.luminous-landscape.com/tutorials/dof2.shtml
Eric Goldstein
--
On Tue, Nov 10, 2009 at 10:21 AM, Austin Franklin
<austin.franklin@xxxxxxxxxxx> wrote:
> Not if the same "framing" is maintained. A common misunderstanding ;-)
>
>> -----Original Message-----
>> From: rollei_list-bounce@xxxxxxxxxxxxx
>> [mailto:rollei_list-bounce@xxxxxxxxxxxxx]On Behalf Of CarlosMFreaza
>> Sent: Tuesday, November 10, 2009 9:59 AM
>> To: rollei_list@xxxxxxxxxxxxx
>> Subject: [rollei_list] Re: Rolleiflex 35mm Cameras
>>
>>
>> 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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