Frage von jwd96:
Hi,
I have a few months ago a JVC GY HD110, and I noticed
only in the field of fuzzy green or violet coloring s.den edges of bright areas that appear, almost like chromatic aberration.
Can someone explain to me why this is so, and why only in the out-of-focus area?
Antwort von masterseb:
haha! chromatic aberrations and is there ARE the inferior s.der look. which is only good s.blende 2.0, never open up next, if you want to work seroös. you you could be the new canon of the optic HM700 get in or live. I do the latter. otherwise it is indeed a bomb camera!
you btw synonymous s.scharfen edges CAs, there are only so thin that dus not see. look for example at times hair in back light. optics without CA are very expensive, unfortunately, the fujinon 14x optic is lower field in terms of remuneration.
Antwort von domain:
zum Bild Das ist schon generelle CA, aber im vermeintlich Scharfen fällt sie einem nicht so auf, wie du hier bei der Ausschnittvergrößerung siehst. Sie ist aber dort genau so vorhanden.
Antwort von WoWu:
This can be a synonymous of bad light distribution of the image point of Optics, so no CA but a divergence in the phase transfer function.
Here are two different lenses on the same camera head.
Can someone explain to me why this is so, The Picture shows a horizontal edge and a tree against a light background, so a typical high-contrast situation.
At the edges of foreground objects is particularly significant to the MTF at low spatial frequencies, because the edges s.solchen determined the extent of overexposure.
In the right figure shows the edge of no irradiation, but the tree.
Links is just the opposite. Lenses have both but same MTF values.
However, the MTF will help us next little here, because they point the properties of the images do not fully describe.
The really complete optical transfer function OTF has another, less familiar second part, the phase transfer function PTF. The man normally suppresses. It has something to do with the symmetry of the point image. Looking at even the light distribution of the point images, then we will see that it is in most cases anything but symmetrical. Point images can be so wrong, as shown in the examples.
Most common cause of coma-error, the point is to create images with a tail in the radial direction. In an oblique point image intensity, it is important, what direction has an edge.
One must therefore know the phase reverse function, which is depending on the direction of the tail s.Punktbild different.
The name comes from the fact that such a distorted image point, the phase of the sinusoidal pattern, so the position of its maxima and minima move laterally.
Antwort von masterseb:
It is certainly the optics, was so synonymous bekritelt in all tests.
Antwort von jwd96:
Thanks for the replies, I'll have to find their way. A new optics is for me not to question, much too expensive.
But purely out of interest: what is a phase-transfer function?
Antwort von WoWu:
I have the top again (for information) edited.
