Ergebnis 1 bis 2 von 2
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Mich gibt's schon länger
- 09.05.2010, 16:27
- #1
Hallo Leute,
beim fotographieren, sollte ja die Kamera bis zu 5 Gesichtern erkennen.
Bei mir aber - wenn ich Glück hab - ganze 2 Gesichter.
Die Einstellung mit dem Unendlich-Zeichen funktioniert nicht bei mir.
Könnte mir da jemand bitte weiterhelfen?
LG Deki
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WordPress Guru
- 09.05.2010, 17:22
- #2
die einstellung mit dem unendlichzeichen funktioniert sicher, die tut nämlich nicht wirklich was ^^
hier wird kein spezielles verfahren benutzt um zu fokusieren sondern wenn überhaupt nur versucht das ganze bild halbwegs scharf zu stellen
kannst mal nachlesen wie das gemeint ist:
hab da was aus einem anderen forum gefunden, sehr gut erklärt aber leider englisch ^^ bin momentan zu faul das alles zu übersetzen
"The cute answer is that "infinity focus" is focussed on things
infinitely far away.
The helpful answer - though it may not seem like it - is this. When your
camera is focussed at infinity, objects considerably closer than this
will appear to be sharp. (This is because the amount of "fuzziness" -
the diameter of the circle of confusion - is too small to be seen). The
bad news is that the limit (i.e. how close they get and still appear
sharp) depends on the aperture of your camera lens, and its focal
length; it also varies according to what you propose to do with the
picture (small web picture to huge enlargement - they have different
demands on sharpness). This zone for which objects appear sharp is known
as depth of field (DoF).
With 35mm film cameras, it is easy to find tables (in books, on the web
etc) which will tell you DoF details for any common focal length. For
example, my 50mm f/1.4 lens shows that at f/22 I might expect everything
from 3m to infinity to be in focus at the infinity setting.
With lenses of longer focal length, the DoF for any lens aperture gets
very much smaller; conversely, for wide angle lenses, it is larger. Thus
if you take a portrait with a long lens at wide aperture, DoF is so
small it is often impossible to get both eyes in sharp focus unless the
subject is dead square to the camera. OTOH, if you use a very wide lens
for a landscape at f/16, you can often get everything from a rock 1m
away to the distant mountains in sharp focus.
There is a slightly better way than setting the camera focus at
infinity, and that is to set it (in my above example with the 50mm f/1.4
lens) to focus at 3m, then everything from about 1.5 m to infinity
should be sharp. This setting is called the "hyperfocal distance". For
any lens, at any particular aperture, there is such a setting which
gives you maximum DoF, from about half the hyperfocal distance to
infinity.
Unfortunately, because these numbers are different for every focal
length of lens and every aperture, I can't tell you what they are. You
will have to do some research yourself, either to work it out (the maths
is not that difficult) or to find a suitable table."
antreten lassen ^^, we schon anderswo diskutiert brauchts bestimmte eigenschaften/vorausetzungen um als gesicht erkannt zu werden
mal suchen
greets Mo
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