Recently purchased the Sigma 60mm 2.8 lens for my Sony NEX-6, which shoots ARW raw files. When converting to DNG (using the newest 8.2.0.94 version), the files increase in size from ~15MB to ~60MB. This appears to be because I have the compatibility settings set to Camera Raw 4.6 compatibility, and the converter believes this means it has to demosaic the image. This is done with no override and no warning that information is going to be discarded, despite the fact that I shoot raw files because I want raw data. How can I produce DNG files compatible with Photoshop CS3 and Camera Raw 4.6, without discarding data and producing huge files?
This is doubly frustrating since manual lenses convert fine. I do not care about any lens correction information in the original ARW files, as only very minor corrections are needed anyway. Losing this information to produce good DNG files is perfectly acceptable to me.
Similar threads show that newer versions of DNG can be converted to without the demasaicing being applied, but this is not helpful to me. See http://forums.adobe.com/message/4312768, http://forums.adobe.com/message/3333887.
I have no plans to upgrade photoshop (especially the CC versions), so need something that works with CS3.
