OM-D EM-5 / black is black

Started Apr 4, 2012 | Discussions
Jokica
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OM-D EM-5 / black is black
Apr 4, 2012

I am very interested to get OM-D EM-5.
I have done some IQ comparison using images on this site.

OM-D EM-5 is very similar and comparable to best APS-C or even FF cameras (MHO), except in upper right corner of image. Black color looks washout and noisy.
On other parts of image, black is black (I love that song)
Is this lens issue, or Dynamic Range, or what?
I am not a pro, can someone please explain.
Sorry about my poor English.
Kind Regards

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Timur Born
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Re: OM-D EM-5 / black is black
In reply to Jokica, Apr 4, 2012

Likely some kind of (too strong) low-cut filter at work. You can find something similar with some other cameras,too, like the D800. The histograms also shows a big ugly spike for pure black on these.

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Jokica
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Re: OM-D EM-5 / black is black
In reply to Timur Born, Apr 4, 2012

Thanks for the explanation.

I just add D800 into my comparison page and the color is even "blackier" than D5100.

The difference is even more obvious now. When I move the frame to i.e. left bottle, there is no big difference between competitors.

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Timur Born
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Re: OM-D EM-5 / black is black
In reply to Jokica, Apr 4, 2012

The EM5 does it, too, but mostly on lower ISO. Look at the box with the orange sewing thread and yellow wool behind that. Parts of these are cut off to black.

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Timur Born
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Re: OM-D EM-5 / black is black
In reply to Timur Born, Apr 4, 2012

I meant mostly visible on lower ISO. Higher ISO addsnoise to these black areas, too.

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Yohan Pamudji
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Exposure difference
In reply to Jokica, Apr 4, 2012

Just looks like E-M5 exposure is higher than others, making the whole image brighter. It's not just the black background. The colorful balls in the foreground are brighter than on the other shots as well.

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Jogger
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depends on what "comparable" means i guess
In reply to Jokica, Apr 4, 2012

4 stops of DR is pretty significant, methinks

Jokica wrote:

I am very interested to get OM-D EM-5.
I have done some IQ comparison using images on this site.

OM-D EM-5 is very similar and comparable to best APS-C or even FF cameras (MHO), except in upper right corner of image. Black color looks washout and noisy.
On other parts of image, black is black (I love that song)
Is this lens issue, or Dynamic Range, or what?
I am not a pro, can someone please explain.
Sorry about my poor English.
Kind Regards

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szlevi
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Another pseudo-scientific, useless-meaningless comparo (nt)
In reply to Jokica, Apr 5, 2012

...............

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szlevi
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Re: depends on what "comparable" means i guess
In reply to Jogger, Apr 5, 2012

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Olympus OM-D E-M5 Olympus M.Zuiko Digital ED 40-150mm 1:4-5.6 R Olympus M.Zuiko Digital 45mm 1:1.8 Olympus M.Zuiko Digital ED 12-50mm 1:3.5-6.3 EZ Adobe Photoshop Lightroom 4 +7 more
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Jokica
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Re: depends on what "comparable" means i guess
In reply to Jogger, Apr 5, 2012

Thanks, guys!

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Timur Born
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Re: depends on what "comparable" means i guess
In reply to Jokica, Apr 5, 2012

I just noticed that you compared a part with grey background (grey gradations printed on paper). Here is a better "black" comparison:

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rare wolf
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Re: Another pseudo-scientific, useless-meaningless comparo (nt)
In reply to szlevi, Apr 5, 2012

If the OM-D sensor response really captures less contrast at the corners as the OP queries, how useless is that? He's only asking others to confirm or deny this "apparent" evidence with real world experience. I'm just as interested ...
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Timur Born
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Re: Another pseudo-scientific, useless-meaningless comparo (nt)
In reply to rare wolf, Apr 5, 2012

Sorry, I misunderstood that this was a question about contrast.

Two possible explanations:

1) DR on the mFT sensors is lower and noise-reduction on JPGs seems stronger.

2) WB on the mFT (EM5) is considerably warmer (more red). Reduce the red on the EM5 result and it will look closer (as in darker and more contrasty) to the other results, too.

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Aleo Veuliah
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Re: Exposure difference
In reply to Yohan Pamudji, Apr 5, 2012

Yohan Pamudji wrote:

Just looks like E-M5 exposure is higher than others, making the whole image brighter. It's not just the black background. The colorful balls in the foreground are brighter than on the other shots as well.

True, I noticed that also, the exposure should be controlled on these testing, all cameras should use the same exposure, because these differences can lead into wrong interpretations

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Jokica
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Re: Exposure difference
In reply to Yohan Pamudji, Apr 5, 2012

Yohan Pamudji wrote:

Just looks like E-M5 exposure is higher than others, making the whole image brighter. It's not just the black background. The colorful balls in the foreground are brighter than on the other shots as well.

Sorry, can not agree with that. Even if "E-M5 exposure is higher than others" and "The colorful balls in the foreground are brighter", it is in such small degree that makes it barely visible.

However, there is much more degree of clearly visible difference in dark-grey areas of the frame between peers.
IMHO, It can not go only to higher exposure.

Regards

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