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Comparison of image quality of 5D & Alpha

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Barry Fitzgerald said:
The area measurement is what the companies use..to enhance belief
that a 12mp cam is twice as good picture wise as a 6mp canera. h
times v=mp no.
Click to expand...
Well, in general there are just 2 different ways to look at it.

Assuming both sensors give equal per pixel sharpness we can assume that:

using your defenition of resolution, a 8 MP sensor has twice the resolution compared to a 2 MP sensor. Which is true if you're looking at a single axis.

But keeping that equal per pixel sharpness in mind, the 2 MP camera will show equal sharpness printing on a A4 format, compared to the 8 MP camera printing on A2 format. Yes, that's twice the size per axis. But how many A4 prints fit into that A2 print? 4.... 4 times the size on your wall.

It's all a matter of interpretation of the numbers.
 
So is it 4x the size or 2x. Maybe rez growth is fibonachi sequential.

Pwa ha ha ha! Now someone needs to chime in with a "print size is totally different" comment. Isn't it eveident that to double the print size you have to quadubble the vertical rez divided by the root of the horrizontal axis squared?

--
What if the hokey pokey really is what it's all about?

--
http://www.wallygoots.com
 
SirSeth said:
So is it 4x the size or 2x. Maybe rez growth is fibonachi sequential.

Pwa ha ha ha! Now someone needs to chime in with a "print size is
totally different" comment. Isn't it eveident that to double the
print size you have to quadubble the vertical rez divided by the
root of the horrizontal axis squared?

--
What if the hokey pokey really is what it's all about?

--
http://www.wallygoots.com
Click to expand...
Hmmm a major in math obviously doesn't require any spelling or 'making-sense-in-sentences' skills ;-)
 
--
I’m a proud member of AFO (Anti Flash Organization)
 
caton said:
are interpolated to alpha100 size, thus looking soft. With a little
bit of sharpening, the roof 5D images look very similar to the
alpha one.
Click to expand...
This is my impression too. I downloaded the file and sharpened the 5d, and it looks quite similar. The sharpening would have worked better if not for the highlights in the 5d image that are not present in the a100 image. Too bad they didn't take the photos back to back.

Still the A100 images look pretty darned nice and of course there will be a resolution gain with it. But clearly this comparision lacked images taken under the same lighting condtions, and to be fair the 5d images should be sharpened.

--
Steve W
 
The alpha sample looks great, but the 5D shot is pretty bad and not a good representation of 5D performance.

While I could not duplicate the original test shots on the Chinese web site, I took one test shot on the 5D and used that to compare leaf detail with the original test shots. With the sample below I experpolated the long dimension of the 5D shot from 3008 to 3872 (same as the alpha). I cropped a similar proportion of the image to the original test shots. I think the difference between the quality of the detail on this crop compared to the posted 5D sample is a good deal less than the original comparision appears to show.



The original (resized for web) showing the crop area is at
http://www.pbase.com/richard_b/image/61828884

--
Richard B.
http://www.pbase.com/richard_b
 
I mean "math."

I disagree on the making sense part. How else might I phrase that the little brawl over size was quite enjoyable?

Cheerio, Seth

--
What if the hokey pokey really is what it's all about?

--
http://www.wallygoots.com
 
... it's when one set's her will firmly on making a life or habbit change (usually on the first of the year; often having to do with chocholate or taming the bulge).

There's my crack at it. As far as size of an image goes, if one chap is talking dimensions, and the other is talking area we get all sorts of excitement. This is math madness at it's best.

Cheerio,
Seth

--
What if the hokey pokey really is what it's all about?

--
http://www.wallygoots.com
 
Everyone knows there isn't much difference between 6MP and 10MP.

From the samples I've seen, image processing of Sony A100 is not much different from KM 5D.
 
iCeZuLy said:
You will find the big advantage of Alpha. It's quite surprising. To
be frank, I did not believe there was such big difference in image
quality between two camera.
Click to expand...
The higher resolution of the A100 is obvious.
iCeZuLy said:
However, the minolta color style has gone.
Click to expand...
Yes. It is. The A100 has a more washed out look to it... look at
the roof, and look at the edge of the roof. The 5D is a lot more
appealing. There is more realism to the colours in the 5D, I feel.

Still, I like the almost double resolution. Too bad they just don't
admit they, Sony, haven't a clue about what real colour is, and let the
Minolta guys, who do, have their way. :)))

--
Gil
Sardis, BC
Canada
 
Gil Knutson said:
iCeZuLy said:
You will find the big advantage of Alpha. It's quite surprising. To
be frank, I did not believe there was such big difference in image
quality between two camera.
Click to expand...
The higher resolution of the A100 is obvious.
Gil Knutson said:
However, the minolta color style has gone.
Click to expand...
Yes. It is. The A100 has a more washed out look to it... look at
the roof, and look at the edge of the roof. The 5D is a lot more
appealing. There is more realism to the colours in the 5D, I feel.

Still, I like the almost double resolution. Too bad they just don't
admit they, Sony, haven't a clue about what real colour is, and let
the
Minolta guys, who do, have their way. :)))

--
Gil
Sardis, BC
Canada
Click to expand...
Hmm its not double the resolution! sorry! lol
 
Gil Knutson wrote:
Too bad they just don't
Gil Knutson said:
admit they, Sony, haven't a clue about what real colour is, and let
the
Minolta guys, who do, have their way. :)))
Click to expand...
While personal tastes on what pleasant colors look like, may differ, "real" colors are not so subjective. I'll quote Imaging Resource after their Imatest analysis on the R1.

"Amazingly, using the DSC-R1's Adobe RGB color space setting produced the most accurate color I've found from any digital camera to date, when interpreted in the sRGB color space!"
 
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