I disagree, but this is not the issue of this thread. The issue is, as a few of us see it, if there is any reason to convert the native raw file in DNG format.
There can be valid reasons:
- if the native format is not supported by your favourite raw processor
- if the native format is uncompressed or very inefficiently compressed (this is not the case with Canons, nor with newer Nikons).
I agree that there is not necessarily any downside to sticking to native RAW and sidecars - in principle. The issue of software becoming incompatible does not worry me - I'm not going to wake up one morning to find that ACR17.2 has expired and 18.0 does not support my original RAWs. It will be an incremental process and one which we will see coming.
For me it's down to these points:
1. Might I need to use DPP or C1 Pro etc to process my files just in case they do a better job on certain images? Maybe.
2. Do I want to have to process out jpegs every time I want a colour accurate web gallery or be stuck with the RAW processor's own web generator (C1Pro 4.7 is woeful in this regard, although it's amazingly fast). No.
3. Do I want to worry about losing sidecar files and thus all adjustments. No.
4. Do I want my DAM application to show me inaccurate thumbs rather than the corrected image. No.
These are the practical issues that affect my workflow and thus I choose to convert to DNG for day to day stuff and archive the original CR2 files onto DVD just in case of 1 above.
I see this as a win-win and see no reason not to convert to DNG, so I can reap it's benefits.
As a practical example, I use Expressions Media as a DAM and a calendar client of mine wants to see a huge selection of images, over 4000. I'm going to send him a xmedia catalog with the free reader app so he can peruse the whole catalog. The thing is, if I had cataloged my CR2 files the thumbnail and preview images he would see would be generated from the in-camera RAW previews and would look quite dull. Using DNGs means that my whole catalog looks as it should, and this translates to good sales. Would you show an uncorrected CR2 file straight out of the camera? I suspect not, and if you catalog CR2s in Portfolio, xMedia etc and show a client a web gallery or a contact sheet then that's what you are doing.
BTW, I'm just looking at C1Pro 4.7. It will open and save DNGs but what a joke - if you save out a RAW as a DNG none of your settings stay with the file, there's no adjusted preview image and if you open a previously saved DNG none of the embedded settings appear! That defeats the whole purpose of DNG so C1Pro are merely paying lip service to the concept. I don't know what happens with out-of-camera DNGs.