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View Full Version : E-M5, Adobe, raw and high ISO


snaarman
3rd May 2012, 06:47 AM
Now that Adobe released ACR6.7 I can import E-M5 raw files into Elements10 (which I hate because it's so slow) and I can also convert them to DNG and import them via old fashioned ACR4.6 into Photoshop CS3 (which I prefer). I could also use Viewer2 but I hate that as well, because it is also slow...

Given that the camera produces quite clean images up to ISO1600, I will continue to use my normal DNG/CS3 method for these. The don't need much noise reduction, I can recover highlights and I know my way round things.

However this all goes wrong when the image gets noisy. As I suspected, ACR4.6 noise reduction is rather poor, so I need a different method.

Anough chat. Show me the pictures...

The same ISO3200 ORF file processed using several different methods. From left to right:

Imprted using ACR6.7 into Elements, saved as jpeg.
As above but save as PSD* then import to CS3 for further processing.
Out of camera jpeg with camera NR set to low.
Convert to DNG then ACR4.6 into CS3.

So, at this speed my old DNG/CS3 method is lagging slightly behind Elements and it's nice new ACR conversion.

http://e-group.uk.net/gallery/data/622/iso3200_test.jpg (http://e-group.uk.net/gallery/showphoto.php/photo/46008)

OK, let's try ISO6400

Now the new ACR6.7 seems to draw ahead.

http://e-group.uk.net/gallery/data/622/iso6400_test.jpg (http://e-group.uk.net/gallery/showphoto.php/photo/46009)

And at ISO12800 the difference is even greater. In this case I also included one from the Viewer2 raw conversion. It comes out looking just like the in camera jpeg....

http://e-group.uk.net/gallery/data/622/iso12800_test.jpg (http://e-group.uk.net/gallery/showphoto.php/photo/46007)


*PSD files. WARNING! Here's the maths. 16Mb sensor, so native file size normally 16*3 (for RGB planes) is 48Mb inside Photoshop. Save as PSD saves the file as 16bit format uncompressed, so the file saved to disk is 96Mb :-)

Pete

OlyPaul
3rd May 2012, 06:58 AM
And LR 3 or 4 would do a even better job as it has more noise slider options than PSE 10 and CS3 is quite ancient now in software terms.

I'd love to get that E-M 5 file in CO6 Pro just to see how it compares. :)

snaarman
3rd May 2012, 07:05 AM
Addendum:

My previous Adobe CS3 rule for the E-PL3 has been "Use raw files up to ISO800, and in camera jpegs beyond that" I suspect this is wrong.

This seems to suggest the rule should be "Use raw and CS3 up to ISO1600, above that use raw and Elements"

All this is of no interest if you have the latest Photoshop CS7 or whatever it is, but I mention it in case it is of interest to folks. The Elements route seems to give me better results, and Elements10 is fairly cheap.

Pete

snaarman
3rd May 2012, 07:06 AM
And LR 3 or 4 would do a even better job as it has more noise slider options than PSE 10 and CS3 is quite ancient now in software terms.

The latest ACR6.7 into Elements10 now sports those extra NR sliders as well... :)

OlyPaul
3rd May 2012, 08:14 AM
The latest ACR6.7 into Elements10 now sports those extra NR sliders as well... :)

That's a big improvement over 9 then as it only had two sliders under noise reduction compared to LR's five sliders.:)

http://e-group.uk.net/gallery/data/500/Picture00023.jpg (http://e-group.uk.net/gallery/showphoto.php/photo/46012)