we have a problem when converting Camera RAW files (such as Pentax PEF, Canon CRW, etc.) into JPEGs. When using
nconvert.exe -out jpeg -o "<outputFilePath>" -overwrite "<sourceFilePath>"
the JPEGs always have a reduced brightness. The RAWs are 48 bits (3x16) whereas the JPEGs are 24 bits (3x8).
Is there any way to keep the brightness somehow

thanks a lot in advance and best regards
andreas