Newsmeldung von slashCAM: Chromatic aberration of a positive times rudi - 9 Apr 2009 23:10:00
Under chromatic aberrations is a Fehlabbildung through the Lens, at the edges s.kontraststarken each basic color varies greatly fray. For example, if a dark edge in front of a bright background s.Objektivrand appears to occur as these clearly visible color bleeding edge on. Modern cameras can be digitally corrected aberrations, however, seem that the human perception now this phenomenon is set to have. Not otherwise is it that now in many 3D animations synonymous chromatic aberrations artificially to be rendered to the image to appear credible to leave. Similar effects are known so synonymous of synthetic aperture noise or blemishes. The eye loves it also messy.
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Antwort von Clemensch:
The eye loves it also messy. So reichts now! I sell my ex 3 and buy me ne nice dirty Consumer Cam!
Neiiiin! In earnest, I can not be friends, and my eyes will get used synonymous NIIIIIIIIIIE!
As of today I do not watch movies more s.in CA's where I see! Demonstratively! Even if it does nothing to help, as once a year is the light for 5min abdrehn!
Liebe Grüße
Clemens
Antwort von deti:
This is now a bit off topic: For the current HD consumer cameras, the CA has now very well under control - not least because the lens is firmly installed. Honestly I find the difference of optical cameras like the HF100 to EX3 so minimal that it hardly a valid argument can buy (of course the EX3 has a greater focal length range and minimal noise less).
... I see direct / mechanical controls and a 50p mode as a weighty argument for expensive cameras ...
Back to the actually topic: This analog effects have a long tradition and give the dry synthetic digital creations a little more life. Somehow a network humming sounds, breaking a record synonymous earthy ;-) - and in the video section, there are similar effects for years, such as the simulation of Lens Flares and CVBS signals.
Deti
Antwort von ed-media:
In terms of CA, I learned that the HD material in much greater than occurs in older SD cameras. Or had previously
simply better lenses fitted, of CA-correction has only strengthened since the high-definition speech, because there is more conspicuous.
While watching, you can see now CAs are often synonymous, synonymous with DigiBetas falls to me again and again on the turn, which means one must simply rotate so that one is trying to prevent sharp contrast edges occur.
Antwort von deti:
While watching, you can see now CAs are often synonymous, synonymous with DigiBetas falls to me again and again on the turn, which means one must simply rotate so that one is trying to prevent sharp contrast edges occur. The expensive lenses have a greater focal length range, but just in the full Wide Angle Are CAs rather violently. Because you should intricate structures with high contrast in the peripheral simply avoided. Sounds silly - but it is so. Previously, it is not so noticed, because the errors of the optical sensors of the lenses could not be mapped.
I am always just how close the meantime poplige cameras s.die quality of professional hardware herankommen.
Deti
Antwort von ed-media:
Ich hab ja on a hands-on with the Panasonic HPX301 seen what the camera has for CAs in normal doorframes when CAC or off times for Lens pulled is already madness weggerechnet because what is in terms of CA.
The JVC GY-HM700 makes for Lutz Dieckmann's quite lovely synonymous Test CA, Optics and Cam were handmade designs. In the series the camera in the UK & U.S. is already available, it depends of the optics from s.meisten CAs exist in 16xStandard-Fujinon Optics (which is synonymous with the HD100/200 in use - and only up to 800 lines dissolves and not just as high quality optics for HD is in terms of remuneration, while the 17x Fujinon up to 900 lines and creating better paid is!).
Me would still CAs in HD optics as 20x and 14x burning new interest. After the Canon 14x4, 4 yes hochvergütet CAs to be to minimize, is now the Introduction of March to June `09 has been postponed because the lens is still not ready, maybe even tinker with the s.CA around, is converted to small with 31,7 mm very weitwinklig and aims to produce low CAs.
I personally do not see CAs positive for 3D glasses, it might be yes to the red and green. ;-)
Antwort von deti:
Strange is that the SLR Lenses for a fraction of broadcast lenses cost and far better optical properties bring. Course are currently no focus, nor Apperture control for video's. The whole video DSLR topic is currently a single mines and therefore I would like so that's synonymous with that.
Deti
Antwort von Bernd E.:
Strange ... just that the SLR Lenses for a fraction of broadcast-cost optics and optical properties far better to bring ... As expected synonymous far higher volumes to the impact of price and of course the most crucial point:
... ... are neither focus nor Apperture control for video's ...
Antwort von Axel:
Strange is that the SLR Lenses for a fraction of broadcast lenses cost and far better optical properties bring. With Nikon lenses on my Letus I, despite extreme and brutal contrasts Backlight never seen CAs. Depends probably synonymous with the quality of Achromats together and a favorable focal A1, which alone produces a lot of color bleeding.
CAs are a problem?
For ENG videographer's what's in it. One sees so CAs in every newscast, contributions, moreover, in which man of expensive optics can be assumed. Other hand, again not because it does not seem to itch. In every newscast you see so blurry, shaky video, poorly converted NTSC with garish colors, Interlaceartefakte, clipping, and even false AR is not always corrected. And next that, despite the dissemination of HD-TVs and GEZ Height in a monthly installment for a Television that stuff is still being sent so that it is only with schwummerndem upscaling can be seen, apparently synonymous not interested in pigs. When should rapidly be converted to HDTV? For the World Cup? At what? What really tells us WoWu about this whole mess?
For dramatic works / complex documentation? Definitely not. A color correction you have to do anyway, and a color correction, cases of masked, CAs can with a few clicks to make Garaus.
CAs as Effect, as presented here?
What kind of message is the transport? The morning after the LSD trip? Striking CAs have gone.
Antwort von deti:
You have absolutely right: only a technically flawless, is a good Picture Picture! One has to remain consistent - my word to the Good Friday ;-)
Deti
Antwort von B.DeKid:
It is very important scenes, the 3D images with "mistakes" may be.
Otherwise it does not hold true. Or. too real. The trend is synonymous GSD in this direction.
It is not halt so we like our environment from the CAD are rendered true.
MfG
B. DeKid
Antwort von MacPro:
Strange is that the SLR Lenses for a fraction of broadcast lenses cost and far better optical properties bring. Course are currently no focus, nor Apperture control for video's. The whole video DSLR topic is currently a single mines and therefore I would like so that's synonymous with that.
Deti There is nothing funny on it, you build your DSLR times apart and compare the size of the image with the transducer of your video camera.
The stronger in the optical image "zoomed" is (the smaller the chip size), the stronger, the figure errors. Is it logical.
Antwort von deti:
Well, it clearly is not the bill, because of the smaller chip area are synonymous less active pixels, making the imaging properties of the lens also must be less good.
Example: The 1 / 2 "sensors (2MPixel) an EX3 are roughly comparable with that of a Canon Powershot SX1 (10MPixel) - but you can see in the Wide Angle EX3 More CA. Sounds silly, but it is so ;-)
Deti
Antwort von MacPro:
wär ja mal interesting as compared to pictures to see.
Antwort von deti:
I could offer PDW700, EX3, HF100 vs EOS 5D, EOS450D, Ixus 70 - unfortunately I have no SX1 in the company, because the lenses would be almost identical to the EX3:
EX3: 31.4 - 439 mm (35mm equivalent)
HF100: 42.9 - 514.8 mm
SX1: 29 - 580 mm
Ixus 70: 38 - 114 mm
Deti
Antwort von Jogi:
Have we gone through all the convergence error of the color tubes forgotten?
The slit mask tubes were not as badly affected, but the hole mask was a gray! What a contrast, a few CA's current Lenses. But true, CA's can be annoying. Only it is too much discussed.
Antwort von handiro:
. One sees so CAs in every newscast, contributions, moreover, in which man of expensive optics can be assumed. Other hand, again not because it does not seem to itch. In every newscast you see so blurry, shaky video, poorly converted NTSC with garish colors, Interlaceartefakte, clipping, and even false AR is not always corrected. this will probably be because the content is more important than the quality ..?
when continuously broadcast grainy cellphone videos need to be handy because the manufacturer does not offer full HD, which has yet to happen :-)
Antwort von domain:
True, if the content is gripping, the CA is no longer on.
This is my only really with the high-resolution sensors have become conspicuous. The first digital Vollformatkamera was many years ago a Kodak camera to Nikon basis, which unequally more CA with her 24 * 36 mm sensor showed the same as Lenses on silver film in the original Nikon cameras. The reason is me me to this day unclear, but could be with the micro lens from each pixel, covering a rather theoretical angle of 90 degrees over the entire image area required.
Antwort von Valentino:
This is my only really with the high-resolution sensors have become conspicuous. The first digital Vollformatkamera was many years ago a Kodak camera to Nikon basis, which unequally more CA with her 24 * 36 mm sensor showed the same as Lenses on silver film in the original Nikon cameras. The reason is me me to this day unclear, but could be with the micro lens from each pixel, covering a rather theoretical angle of 90 degrees over the entire image area required. CA is synonymous with synonymous with such negative and slide films is highly dependent of the quality of the optics, as synonymous of the gates from opening. With a 2.8, the CA more than a 5.6.
On very bad optics and Schmallfilm CA can be even seen on the screen.
The image sensor of this record is different from CA s.der nature of the sensors and s.der small size of this image converter.
The image sensor is much more light than a film could reflect a cause for his CA.
In very small quantities, I see s.einem certain angle with my glasses s.Hellen edges a little synonymous CA!
Antwort von ed-media:
Last guarantee the IC with a few pictures and made in the mirrored disks, there was light through the window like CAs evident. Picture post, I on occasion.
Antwort von domain:
No pork is the CA that it's always been synonymous with the most expensive lenses gave (what I could prove), if the content is and the time for the detection and analysis of the CA is not present.
This is regularly the case when no boring static scenes about 6 seconds in the video will stay longer because everything is already an error s.sich.
Therefore, if in a video analysis and the detection time period for the CA is at all possible, then the corresponding sequences in the video have been generally well, because as far as it may never come, that such effects for a "normal" viewers will be visible at all .
A totally different and totally uninteresting story is the frame analysis of someone who in his NLE frame over a certain number of seconds on his monitor and the view may be the gray on the color of the pear whether increases.
Antwort von ed-media:
Here's the link promised
Antwort von PeterM:
Only two times remarks.
CA similar sharpness is of course dependent of the Snensorgrösse.
So, for example, a and the same lens on a 1 / 3 inch sensor at a CA of 3 pixels. a Vollformatsensor with the same Resolutionzeigt dan is not a CA. One should not forget that we are on very small sensors synonymous with a wavelength of light approaching, which in turn synonymous leads to diffraction effects. One reason why Aperture usually around 5-6 s.schärfsten is. Also generates diffraction incidentally CA
The more complex the Lens Zoom So the more the harder it will be such a lens to construct. That is, inter alia, a simple reason why digicams (Kniplsen) is usually only a 3 Zoom fsach have.
BTW. Based on the IC. This is NOT a CA. These are double reflections s.der disc / discs. The wheels are different on both sides Coated form. Most of energy-saving reasons.
The red comes as Picture of the IR coating
If you are interested in the Effelt look easy at times flat and co in the specs.
Antwort von WoWu:
@ Domain
The first digital Vollformatkamera was many years ago a Kodak camera to Nikon basis, which unequally more CA with her 24 * 36 mm sensor showed the same as Lenses on silver film in the original Nikon cameras. The reason I am me until today cryptic, This is because the colors Aders sensors "see" as celluloid.
Each light-sensitive area (pixels, though this is not exactly true) averages the brightness and color over its sensitive area. This creates a (pixel), a single color and a uniform brightness, as shown in the figure.
The image sensor consists of regularly arranged, square picture elements, this photo surfaces. Unlike traditional shooting on celluloid, where the light-sensitive elements of irregularly shaped grain structures, occur in the color bleeding edge transitions s.der regular pixel structure particularly striking in appearance.
Color bleeding but still next to the Optics in other links in the transmission chain, such as synonymous with the mosaic filter of the image and converts the digital color.
