Raw mode on the Leica M8- Uncompressed DNG uncovered

tim114

I just saw this theard. and I

found quite interesting about it





http://www.leicaplace.com/showthread.php?t=363


From the link, they did say how to unlock uncompressed raw mode on the M8

edwardyung

e+先知到..........

tattat

thats really cool

basschan

唔知點解，我set 左jpeg+raw 係電腦只係見到在jpeg檔。
有無ching 有尼個情況?

basschan

唔該晒ching ，收工返去再試下先。
依家感覺好似開中大獎咁

tim114

tattat 發表於 2014-2-20 13:24
thats really cool

Ching possible post some photos side-by-side test of the uncompressed vs compressed DNG files??

tattat

normal dng to jpg @ iso1250


normal@iso1250 by Kenneth1216, on Flickr


the Raw to dng to jpg @ iso1250(no noise reduction)

16bit@iso1250 by Kenneth1216, on Flickr

tattat

can only take the pics under my table at work, will do some more later.

bubu

就咁睇，图1暗部细节好好多喎。

Raw-to-DNG有什么好處？請指教。

basschan

tattat ching 麻煩你教下我點用....
我開左個命令之後開左個個M8raw2dng tools 之後唔識用....
搞左好耐都睇唔到個RAW檔

basschan

唔係好明點打指令

redrede

fxckin impressive

basschan

哦，原來係咁。謝謝了

18x24

My Share .... @ ISO 2500

1st one - direct JPG from camera (WB off) (added 100% Cut, 3rd image)
2nd one - Uncompress RAW to DNG (LR) to JPG (with WB set, no post "noise reduction")(added 100% Cut, 4th image)

0.95

good share ~

今晚返去試吓先。

thanks

vincecharus

Very interesting!  8-bit (compressed) and 14-bit (uncompressed) channels certainly make an obvious difference!

I'm always interested in the far shadow/black of M8 because of its thin IR filter (0.5 mm) in front of the sensor in comparison with M9 (0.8 mm).  Near infrared makes some far shadow/black appear with a red tinge (without an external IR filter) on M8.  Taking near-IR photos with M8 is always interesting.

Kanedias

Finally got sometime to test this out. Thanks Tim ching for sharing this invaluable resources and piece of info.

I have generated a series of 4 photos in this round of testing:

1. RAW -> DNG (@ ISO 2500)


L3550187 (RAW @ ISO 2500) by kanedias, on Flickr

The photo is shot at ISO 2500 @ F4, manual ISO using the white postcard. Colour posted edited to try to match with Sample (2). No noise reduction has been applied.

2. RAW (@ ISO 160)


L3550190 (DNG @ ISO 160) by kanedias, on Flickr


This is shot at  ISO 160 @ F2, this hope to serve as a control over what are the proper colours of the test subject should be. Manual ISO using the same postcard.

3.  DNG (@ ISO 2500)


L3550188 (DNG @ ISO 2500) by kanedias, on Flickr

The photo is shot at ISO 2500 @ F4, manual ISO using the white postcard. No noise reduction nor post colour adjustment has been applied. You could see that the colour is very off from sample (2).

4. JPG (@ ISO 2500)


L3550187 (JPG @ ISO 2500) by kanedias, on Flickr

This is straight out camera jpg at ISO 2500. No white balance or any post adjustment applied.

Kanedias

What I wish to share with other chings are:

1. Don't convert just based on the RAW2DNG tools. You need to at least set the black level otherwise the colour cast in the converted DNG file is nearly in-revocable. I simply can't work those back to a normal picture.

2. I don't know what is at work in the sensor at high ISO in writing the RAW, but it seems that some colours are really off (eg. those stripes on the gadget bag). It takes some effort to tune to colour back to normal. I hope that there are some future fix on the tool probably on the colour channels. It is now very painstaking trying to adjust all the colours. I have yet to try what happens at low ISO though.

3. The RAW->DNG file produces a DNG file that has much greater flexibility for post production. It is usually the off-colour that put me off shooting the high ISO, but not the noises. IMO noises are not too bad if you just blend in a bit of noise reduction, but off-colour cast is hard to tune back to normal using the native DNG.

4. The out-of-camera JPG from M8 is not too garbage!!

Looking forward to see other chings tests as well!!

tattat

I think the writing speed is just too slow for me when using the raw mode.

頭文字L

M8 in camera JPEG coding alogrithm is done by Jenoptik, former Zeiss Jena, fine details with outstanding colors rendition even by today standands