[rollei_list] Re: Lens Flare
- From: Carlos Manuel Freaza <cmfreaza@xxxxxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Sun, 20 Apr 2008 22:11:24 -0300 (ART)
That is not flare Elias, that is a neon lamp located
far regarding the camera at a top of a building with
atmospheric factors to consider, anyway my point is
not that I never got flare, my point is that I never
got the oval flare with the cross shape, please note
there are a lot of strong light sources in the image
and coming from different angles.
Carlos
--- ERoustom <eroustom@xxxxxxxxxxx> escribió:
> Thanks Carlos. I think I saw some flare on one of
> your photos - I put
> a note there.
>
> When I looked into the rear of my lens I could see
> dust and little
> red fibers (from the plate adapter seals). I'll get
> that cleaned out
> as carefully as I can, and then I'll try again.
> On Apr 19, 2008, at 10:56 PM, Carlos Manuel Freaza
> wrote:
> > The samples are very interesting Elias, thank you
> for
> > sharing, they come from different cameras and
> lenses;
> > one or several highlights reflections with the f
> stop
> > shape are normal and usual, the oval artifact with
> the
> > cross surrounded by a bright light ring are not so
> > usual and common, perhaps it has a similar cause
> > regarding the highlights reflections with the f
> stop
> > shape but only appearing with a predominant light
> > source in the frame, anyway I don't recall this
> > reflection in my photographs and I like very much
> > nocturnal shots with available light and shots
> against
> > the sun like the samples mentioned yesterday,maybe
> I
> > did not get that special flare by chance, I add
> two
> > other samples without it taken under similar
> > conditions regarding the samples you mentioned:
> >
> > Rolleicord IV Xenar:
> > http://www.flickr.com/photos/itarfoto/1122475714/
> >
> > Rolleiflex 3.5F Planar:
> > http://www.flickr.com/photos/itarfoto/482514087/
> >
> > All the best
> > Carlos
> >
> >
> > --- ERoustom <eroustom@xxxxxxxxxxx> escribió:
> >
> >> A flickr contact of mine put the following
> together.
> >> It will, I hope,
> >> interest the group:
> >>
> >>>> A quick search through Flickr came up with the
> >> following...
> >>>>
> >>>> (1) A Mamiya 80mm f/1.9:
> >>>> http://www.flickr.com/photos/puja/2282039950/
> >>>> (2) Yashica Electro 35:
> >>>>
> >>
> http://www.flickr.com/photos/jeffwyonch/1527193632/
> >>>> (3) Yashica 35 cc (?):
> >>>>
> >>
> >
>
http://www.flickr.com/photos/silverfingers/1849617257/
> >>>> (4) Yashica Electro 35:
> >>>>
> http://www.flickr.com/photos/lslphoto/1421172594/
> >>>> (5) Mamiya c330:
> >>>>
> >>
> >
>
http://www.flickr.com/photos/91744974@N00/2057767850/
> >>>> (6) Rolleiflex 3.5F:
> >>>> http://www.flickr.com/photos/saksak/690985963/
> >>>>
> >>>> So, Elias, you are in good company! Many
> people
> >> with many
> >>>> different types of cameras have observed the
> same
> >> artifacts
> >>>> on their pictures. Indeed, the "cross"
> artifact
> >> in question
> >>>> shares somme common properties in each of these
> >> examples:
> >>>> it's located symmetrically across the optical
> >> midpoint of
> >>>> the the image; it has a one axis aligned
> directly
> >> toward
> >>>> the light source; and, it's surrounded by a
> ring
> >> of bright
> >>>> light, a common lens flare artifact. Multiple
> >> flares are
> >>>> possible, as shown in examples (2) and (5).
> The
> >> latter is
> >>>> especially nice since the top flare is likely
> >> from the
> >>>> reflected sun off the water's surface.
> >>>>
> >>>> I think that what you're seeing is most likely
> an
> >> optical
> >>>> caustic, caused by either internal reflections
> >> of, or
> >>>> refraction through, the lens elements.
> >>>> (http://en.wikipedia.org/wiki/Optical_caustic).
> >>
> >>
> >>
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> >
> >
> >
> > Yahoo! Encuentros.
> >
> > Ahora encontrar pareja es mucho más fácil, probá
> el nuevo Yahoo!
> > Encuentros
>
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