Dual-ISO : lots of artifacts in bright areas

[AvarageJoe43]

Hello,

I'm having an issue with Dual-iso feature. Main problem is artifacts in bright areas and the image itself looks too grainy.  I've attached DNG files. Can I salvage it ?

Workflow:
1. MLRawViewer 1.3.3
2. cr2hdr.lrplugin (LightRoom)
3. After effects ACR (or Photoshop ACR)

Thank you in advance

http://www.filedropper.com/m14-1625000312  - not processed

http://www.filedropper.com/m14-1625000312-dualiso - processed

[dmilligan]

Other than being extremely underexposed, I don't really see much wrong. Because it's so underexposed, you're pretty much only getting data from the brighter exposure (the darker exposure is just noise, so nothing can be recovered from it), so the "artifacts" and loss of resolution are to be expected. You can play with some of the interpolation options for cr2hdr, but I don't think there's much you can do. Next time make sure you ETTR (and only use dual-ISO if necessary).

[garry23]

@avarageJoe43

As hinted in the reply, from my experience Dual-ISO and A-ETTR are well matched bedfellows.

This short post may help you http://photography.grayheron.net/2014/07/consolidation-series-part-2.html