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CP990: Sometimes it...

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Well,

It seems nobody understood me. So shame on my humour :)
I was refering to the purple (or blue) fringing in the center of the pic.
 
Andreas P. said:
I was refering to the purple (or blue) fringing in the center of the pic.
Click to expand...
Do you think that any other digicam could do this job better?
 
I think you expect too much from a $1000 camera. All cameras in this price range or lower exhibit these effects.( Chromatic Aberation ) You don't see it as much in some because of their reduced resolution or in camera software tricks. We could have much better performing lenses in our digital cameras if we could just give up the zoom feature, but there is too much demand for it.

In the astronomy world we have to pay $2000 and more for a telescope with an apochromatic lens. ( tube and lens, no mount or electronics ) If you need that kind of performance, get a professional camera like the D1 and then buy an expensive apochromatic lens for it.

You can also remove these artifacts from your images using simple techniques in Photo Shop or paint Shop Pro. A much less expensive solution.

Here is your image after a 30 second session with Paint Shop Pro ... no chromatic aberation left.



And here is your image with some color balance, level and contrast adjustments. This took another 30 seconds in Paint Shop Pro.



Enjoy your wonderful camera.

Rick
Andreas P. said:
Hi,

Don't get me wrong. The CP990 is a very versatile cam. But sometimes it
shows it's bad sides.

Click to expand...
 
Rick,

Thanks for your efforts in enhancing the images.
And, once again, don't get me wrong.
I am still enjoyimg the cam.

Best regards,

Andreas
 
Yes, the F505V's artifacts are nearly identical ( just slightly brighter and a different hue) to the CP990.

Which of the two examples below would you prefer in you camera. I would prefer the top one ( cp990 ) with the fainter far violet vs the bottom ( 505V ) with the brighter blue.

There has been a lot of hype about the "Carl Zeiss" lens on the F505V ... Sony does not have a long reputation as a camera manufacturer. So in order to give their product some credibility they put the Kyocera built "Carl Zeiss" lens on their product. Not a bad move. It is not however a 'killer lens'. It is a well designed lens suited to the task at hand. A lens with a Nyquist frequency of 128 lines pairs per millimeter would be mediocre by 35mm standards. The F505V also creates artifacts as you reach the extinction resolution with banding and moire effects. See the resolution charts at http://www.imaging-resource.com/IMCOMP/COMPS01.HTM . At the same frequency the Nikon CP990 does not exhibit those effects. See examples below. CP990 on left - F505V on right. This is probably a firmware issue and probably can be corrected by Sony in the future.

By the way, I've "quoted" the "Zeiss" names above because in my opinion lenses made by Kyocera of Japan are not ( and should not be confused with ) the "real thing" made by Carl Zeiss Jena in Germany. What can I say, I'm a traditionalist when it comes to these things. ;-)

Rick

p.s. Both of these cameras can take really great images. personally I prefer the Nikon ... others may feel more comfortable with the Sony. That's as it should be. We need several manufacturers making a wide variety of quality products. This creates competition that can only benefit the consumer with newer technology, better designs and lower prices. Enjoy!

Examples of high contrast artifacts CP990 (top ) F505V ( bottom )



Example of aliasing at extinction resolution CP990 left - F505V right
( chroma removed from both images to see just resolution effects )


Andreas P. said:
Manuela,

Take a look here:

http://www.dpreview.com/reviews/sonydscf505v/default.asp?page=12

Nothing to add.

Best regards,

Andreas
Click to expand...
 
Rick,

Thanks for your efforts in your try to convince me.
Well, this whole theme is not new so only two comments from me.

The lens design of this Vario-Sonnar Zeiss lens is calculated by Carl Zeiss.

Zeiss further is stating that they are guaranting the same quality level in aspect of production quality as it were produced in Oberkochem.

Regarding the "purple-fringing" of the CP990. I just can give my empiric results,
because i own the Nikon and the Sony.
And my results are that the CP990's purple fringing problem is worse than
that of the Sony.
Well, you can always state that this is because i can't operate the CP990 than
it should be operated...

Best regards,

Andreas
 
What so ever - I love the Coolpix very very much and I am very happy with it (I had a Canon Powershot S20 before). Sony is no alternative for me because of the memory stick.
 
Manuela said:
What so ever - I love the Coolpix very very much and I am very happy
with it (I had a Canon Powershot S20 before). Sony is no alternative for
me because of the memory stick.
Click to expand...
No doubts the Coolpix is a fine cam, but what is wrong with the memory stick?

Best regards,

Andreas
 
Andreas the memory stick....
works only with Sony,that what is wrong !!!

Regarsa.

Frances.
Andreas P. said:
Manuela said:
What so ever - I love the Coolpix very very much and I am very happy
with it (I had a Canon Powershot S20 before). Sony is no alternative for
me because of the memory stick.
Click to expand...
No doubts the Coolpix is a fine cam, but what is wrong with the memory
stick?

Best regards,

Andreas
Click to expand...
 
I'm not trying to convince anyone of anything except to be less naive ... as an professional engineer ( doctorate in electrical engineering ) I know the devil is in the details ... there is far too much market hype and far too little hard data in the digital camera arena. Science is science and hype is hype. Unfortunately too many newbies confuse the two.

It's like the difference between Astrology and Astronomy - one is a belief system the other is science. We shouldn't confuse the two.

You can believe anything you want ... but I beleive it is important not to let unsubstantiated or incorrect information to go unchallenged on this forum. Those who know better owe it to those who don't.

Rick
 
Rick,

if you are an professional engineer this is great. Because in this case
you should be a able to discuss on the base of facts.

Fact is that the Vario-Sonnar is calculated by Zeiss. Fact is that Zeiss is verifying the
quality of the lens (production) although it is produced in asia.

Well, Zeiss does not mean that there is no purple fringing. Nikon does not mean that it is
better than Sony.

Chromatic aberration, well this nasty effect how do you measure it? Measurement is one
base of electrical engineering, isn't it?

As i mentioned before i have the CP990 and the F505V and fact is that the CP990 suffers more
from this problem (my empiric results).

BTW: I am an professional electrical engineer too but this doesn't mean that i don't
make mistakes. Maybe this faultlessness comes with the doctors degree.

Sincerely,

Andreas
 
Rick,

I have reread the review of the 505V here on this site. There is written
that the F505V does a significantly better job in aspects of CA than its
competitors. Well, i have to confess that my english isn't perfect but...

A statement of Mr. Askey would be helpful.

Best regards,

Andreas

BTW: (I will never state again something against the macro capabilities of the
Coolpix :)
 
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