I was just reading reviews of the new, Leica M10 Monochrom – a rangefinder style (“retro”) camera by the venerable German company (with history going back to 1914, and even further), which is designed to shoot only black-and-white. There are certain benefits to making dedicated b&w cameras, most importantly in the fact that all image sensors actually are black-and-white ones, with just different techniques such as applying “Bayer filter” on top of the b&w photosensors. This means that there is a grid of RGB colour filters on top of the sensor, so that some pixels in the final image are produced with only the red, green, or blue wavelenghts of light. This then needs to be further processed, with a demosaicing (or “debayering”) algorithms to construct the colour image out of (filtered) b&w information coming from the different parts of the image sensor.
And then, when this kind of colour digital camera is used for taking black-and-white photos, there needs to be further processing, as the colour values are removed to get back into a monocrome image.
A dedicated monocrome digital camera has the dual benefits of getting more light to the sensor, since there is no coloured filter layer on top of the sensor. This means that it can have perhaps 1 to 1.5 EV stop better light sensitivity. And also, there is usually slightly better dynamic range than in (filtered) colour sensors – e.g. in scientific equipment non-filtered monochrome sensors are often used, as they can capture higher range of wavelenghts, and operate better in low-light conditions.
The monochrom digital camera body by Leica has price tag of over 8000 dollars, and a good lens on top of that is perhaps 2000+ dollars more, so we are talking about 10 000+ dollars/euros investment. Also, the retro style ergonomics, old-school focusing system and lack of many features that are common in today’s digital cameras means that this camera is not for everyone. I would say that the main point of this kind of device is in producing social and cultural class divisions (relaying Bourdieu here). That M10 Monochrom surely would look nice on top of the dashboard of your Classic Porsche 911…
It is also true that at some point camera tech is like Hi-Fi audio tech: you can pay more and more, and at some point the final gains are so minor, that only those who are true believers are capable of noticing anything. (There are, after all, cameras like Phase One XF IQ3 100MP Achromatic, where the digital back alone costs over 50 000 dollars/euros.)
In my style of amateur photography, such factors as ease of use and flexible camera controls mean more than Hi-Fi sensor quality, so for my purposes even my Canon EOS M50 is capable of delivering “good enough” quality in b&w, particularly when shooting RAW. Here, below, are some early hour experiments from today, my Sunday morning walk.
It is obvious that as the proper winter seems to be largely gone, as another sad side effect of global climate change, the outdoor conditions here in wintertime are more like an “eternal November”. The low-light capabilities certainly matter now for a photographer, as do sharp and wide-aperture lenses. But I am personally hunting for certain mood and feeling, and thus I am not so concerned about blur or softness – it can even positively play a part in the artistic style I am looking for.