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 Grüne Kante an scharfen Hell/Dunkel-Kontrasten?

[EX1] Green Edge s.scharfen light / dark contrasts?



Frage von DrNibbert:
September 2010

Hey everyone!

I've just discovered something strange s.meiner EX1 and wanted to ask whether the "normal".

I had set exposure to high and I noticed that s.der edge of over-exposed to "normal" unexposed areas of a 2-3 pixel thick green "halo" similar to the case Cromat aberration arises.

Here I have uploaded an example image:

www.nhx-music.de/stuff/overexposed.jpg

When I use the exposure appropriate post regulator this halo is no-longer so clear to see still in vergößerun however.

www.nhx-music.de/stuff/normal.jpg

Background is, that changed in my EX1 recently the prism / imager was, and I suspect now that was because geschlampt something and something is not adjusted so entirely correct - perhaps I can see but synonymous only ghosts, prior to this repair, I have never something respected, but perhaps therefore not synonymous, because it was not there.

Funny is synonymous, gives rise to the halo only s.der lower edge of light and dark contrasts. If I use the same scene movies, but put the camera on the head or a 90 degree incline, is the green edge to see no more.

I did this recording in the Factory Preset Picture Profile used and a white balance made, so one attitudinal sache is excluded.

Can someone please tell the gaze of you and possibly compare with your own ex? Can this be a problem that arises by contaminated adjust the prism?

Thanks for the info!



Antwort von deti:

If the Effect of Aperture and dependent position in the Picture, it would be the normal chromatic aberration (s.Rand should be more).

Deti



Antwort von DrNibbert:

thanks for the answer.

I have made of the same scene once three recordings, with each of the striking positions s.verschiedenen put in the picture.
In the lower half of these edges appear green in the upper half blue / purple.

www.nhx-music.de/stuff/unten.jpg
www.nhx-music.de/stuff/oben.jpg
www.nhx-music.de/stuff/mitte.jpg

And as I said are synonymous only horizontal fragments seen, the camera is tilted by 90 to see either green or purple stripes.
(S.stellen again for the camera horizontally to lie - see picture 3)

www.nhx-music.de/stuff/links.jpg (light bluish discoloration?)
www.nhx-music.de/stuff/mitte-2.jpg (no edge)
www.nhx-music.de/stuff/rechts.jpg (no edge, but s.horizontalen lines)

Hand, seems somehow too extreme for "normal" Cromat aberration, especially since it occurs not only in the building corners, but really anywhere in the building.

There are indeed better than ever 3-4 pixel ...

From the Aperture does not seem to depend on it, but the zoom - in the Wide Angleist it much stronger than the telephoto end (I use no filters or additional lenses intentional / before ex1)

Can the result from a poorly adjusted prism?








Antwort von Replay:

These are very typical CAs (ie chromatic aberrations). The reason can be manifold. Either it is you never noticed or the prism and / or the lens is not fitted exactly. If the lens was installed dirty, should synonymous edge blurring or fuzziness s.nur occur in a Page WW-position. However, a EX1 usually no CAs show and if the lens produces what should the rausrechnen the electronics (which is made very often).

I've read more reports (eg here in the test and the CX115 in a forum posting on the CX305) that for Sony cameras here and there with a built-in dirty or decentered Lens is the problem.

I have my first CX115 times tested for these problems out, all in the green zone.

Regards

Replay



Antwort von DrNibbert:

As I said, the prism has been replaced (of AVC, which otherwise make synonymous the Sony-Support)
if I'm completely in WW and close s.ein line with the preceding object, I see actual edge blur:

www.nhx-music.de/stuff/randunschaerfe.jpg (right side)

synonymous here the question: is it still "normal" or was there geschlampt the repair?



Antwort von Replay:

No, this is not normal and confirmed my suspicion with the decentered lens, since the blur occurs only s.rechten edge. From order to AVD, where pulling out the mutton legs, because a camera does not leave in such a state, the workshop allowed. Something I really do not understand and for such obvious blunders, I have no sympathy. It is always something going wrong, but something like what is seen to so good, should not happen.

I would insist on synonymous, that the thing will be repaired immediately and without waiting, because even the buck has reingehaut AVC. So within five days of repairs to the thing clean again when you are on the table.

Regards

Replay



Antwort von DrNibbert:

Thanks for the info, would I do then is really, really a ganzschöne insolence of AVC. Let us hope that they get it this time.



Antwort von WoWu:

These are phase-transfer errors caused by the point spread of your lens, which has of course changed with the prism exchange.
Quite typical for this is that is irrelevant to an inclined point image intensity, the direction of the edge of.
Here, the maximum and minimum of the position of a sinunsförmigen wave (light) moved sideways.
The AVC is synonymous not change much on them and can not really claim it is synonymous, because the point images of Lenses in this price range are usually not better.
Also you have the old version of certainly not the point of the image you could provide comparatively.
The complaint I would save me.



Antwort von DrNibbert:

What can I do about it? Can I throw away cam now?
then to the Installation Procedure me back the old prism, so I had less visual errors.



Antwort von WoWu:

At the point image of your lens, you can change that.
Tentatively try it a different lens, which has a more favorable point spread.
But cheap Lenses usually no good point images have low-pass filter mask blur () the effect sometimes. To that extent you can say almost of happiness, because you at least (as seen) have a good sharpness.
And with the old prism .... sitting ever again as it once was.
What was with the old prism wrong?



Antwort von DrNibbert:

can you explain to me again exactly what the point with the picture prudential? How is it that now this effect occurs, although previously it was all ok? On Lens has been no change.

With the old prism ansich was not only okay, that it has produced edge of the picture in bad light green stripes s.linken fairly clear and right, but that's actually been little better, but that's just now been added with this point the images. Is that realistic, it is better if you include the old prism again?



Antwort von Replay:

"WoWu" wrote:
These are phase-transfer errors caused by the point spread of your lens, which has of course changed with the prism exchange.
Quite typical for this is that is irrelevant to an inclined point image intensity, the direction of the edge of.
Here, the maximum and minimum of the position of a sinunsförmigen wave (light) moved sideways.
The AVC is synonymous not change much on them and can not really claim it is synonymous, because the point images of Lenses in this price range are usually not better.
Also you have the old version of certainly not the point of the image you could provide comparatively.
The complaint I would save me.


And what is with the blur s.rechten edge? This is clearly a decentered Lens and has nothing to do with a phase-transfer errors. Any bet that the uncertainty s.einer certain zoom position is gone, what is logical, since the optical path through the lens changes with fully extended zoom.

Especially since added that this effect with the color fringes previously was not there. So I would accept such a "repair" under any circumstances. It is after all an EX1 and not an Aldi China firecrackers with fixed-focus lens. A EX1 with such aberrations is unusable for the intended use of such a camera.

Regards

Replay








Antwort von DrNibbert:

"Replay" wrote:
Any bet that the uncertainty s.einer certain zoom position is gone, what is logical, since the optical path through the lens changes with fully extended zoom.


bet won, I'm falling in any way and complain. for which I almost ¬ 2000 for this "repair" is it really paid've ne imposition.



Antwort von WoWu:

Phase errors are coma-error.
Radiation from the edge of the lens point spread in the form a tail.
Therefore, the point image with the Focal changed logically since dropped edge beams.
Optics einwenig more than inclined Lenses and aberration.
And if you exchange the prism in the beam path, inevitably you change the point spread. This has to do not only with the Lens.
And the influence of the camera angle is quite typical.

If cause the lens of the EX1 is not just now the prime example of a super-Optics.


But go back and reclaim it .... please let us know what it was.
Where do I find fairly expensive n.synonymous 2.



Antwort von DrNibbert:

but how can it be that there is no problem with the old prism were? even if it must be aligned so micrometer, one can not expect the synonymous with the new prism is feasible.



Antwort von Replay:

To sum up. There was a problem with the prism. It was replaced (in 2000 ¬ - quite violently). Now we have a decentered Lens and coma errors. Both were not there before. So somewhere was made to repair a mistake.

No matter how hoch-/minderwertig the Lens of the EX1, but that one must stop down to a coma-error does not have is can not be the meaning of such an expensive camera. Such aberrations are not visible on my CX115, as there is no edge blurring. And the lens of the EX1 is still able to compete well with the Lens of the CX115, right?

Regards

Replay



Antwort von WoWu:

@ DrNibbert
The point image of an optical path changes with each part that is inserted into the optical path. Often it is even deliberately altered by low-pass filter to be in one-chip cameras larger areas (several "pixels") irradiated simultaneously.
It is synonymous nicely the spectral effect of the tail visible.
Thus, the point spread changes inevitably with the prism and its installation.
(Annex a few times point images)
Typical s.dem error, as said, the angular dependence, suggesting that this error.
One may argue with the front-and-after. Perhaps it is successful but if the lens is the same and the installation was done properly (and I assume again), that will be difficult because one would have to cut short in a dispute this quasi optical laws. Difficult.
Try ...

And what the lens comparison of "Replay" is concerned, each has its very own camera system weaknesses and strengths. Advantage in the EX1 is flat, that resolution is so high, at least, that you see such errors, what is of most knopfgroßen 5mm lens can not really say. But they have very different advantages.



Antwort von Replay:

The "knopfgroße 5-mm-lens" of the CX115 is the motive in any case down so sharp that one can see the transition from the lamp socket to the desk very well. What can not be seen are those fringing (which origin they want synonymous), edge blurring and CAs. And if a CX115 is easy, you can be happy one synonymous SD707 CX550 or use the Comparison.

I can only repeat myself. Such aberrations can produce a stout EX1 not produced and they do not synonymous, when the device is in order.

Regards

Replay



Antwort von WoWu:

The knopfgrosse 5mm objectively contributes s.wenigsten.
The edge sharpening makes as much more.
Calculate the time you moved out of lens performance, which should be kept for 1 / 4 ". The at 200 lp / mm.
Do we want to bet that the Lens of the are not provided?
Sharpness is relative and most feel a picture with high contrast at low spatial frequencies more sharply than a really sharp picture right up to high details. (High spatial frequencies)
Count on it, that the EX1 Lens Knopfobjektiv can not reach the water and therefore the point at pictures to see those parts of synonymous rather daring.



Antwort von iMac27_edmedia:

Good - CAs look different.

One question why you have to renew the beam splitter at all!
Normally it is supposed to replace the whole unit including the often glued CCD / CMOS chips and then again just Optics
be measured!
But spite of all this, apart from the picture it looks really sharp for errors from the EX1.




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