Sigma Photo Pro version 5.5 offers a dedicated monochrome conversion mode.
The results from this mode are gorgeous. With technically excellent images, the technical advantages of direct black and white conversion don’t jump out and make themselves obvious, but in theory direct conversion should be able to deal with noise and dynamic range a little better.
The main problem in preparing the images here was an SPP 5.5 for OS X that crashed 20 times or so over the course of an hour. Clearly Sigma's engineers just cannot get their code correct (as in program correctness in computer science terms), even if they can produce high quality output.
Because of the dominant red/orange color, I went with a blue bias to accentuate the tonal differences and to create more drama.
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Since 2009, Diglloyd Guide to Mirrorless covers mirrorless cameras and lenses. Includes interchangeable lens camera systems (Sony, Fujifilm, Olympus, etc) as well as fixed-lens cameras (Sony, Sigma, Ricoh, etc).
In addition to the manufacturer-brand lenses, lens coverage includes 3rd-party lens lines like Zeiss Touit, Zeiss Loxia and Zeiss Batis.
It includes hundreds of pages of exclusive coverage and high resolution, Retina-grade examples for the new mirrorless camera systems from Sony, Fujifilm, Olympus, Sigma, Ricoh and more. Also included are operational concerns, like shutter vibration or other camera behaviors. This publication will play a decisive role in your selection and use of mirrorless cameras and lenses.