There are quite a few articles and comparisons between MM246 and SL out there. I think the consensus is - use the one you like. Both cameras produce outstanding black and white images. Where MM246 wins at using colored lens filters, SL catches up with a newer sensor, higher bit depth and ton of other features. I used both and can't say which one is better. Their pros and cons are so balanced and different at the same time that it almost makes you wish to have two of these at the same time.