----- Original Message ----- From: "David Dyer-Bennet" : For me the point of a B&W camera would be that it should be more than : a stop faster; the Bayer filter blocks 2/3 of the light at each pixel. : Also higher luminance resolution of course, but that's more a : technical point than an important artistic or usability issue. (And : for the things I need the extra stop or so I certainly don't need : 48MP; a 6MP B&W camera made with current sensor tech would be lovely.) 4 pixels are covered by the Bayer array to yield GRGB - 4 photo sites to make a single pixel A 6Mp camera is actually a 24Mp already, with 3/4 of the photosites effectively unavailable to us :( ..plus that extra stop you mentioned :) : It'd also be nice to remove the IR filter while we're at it, so it : could be an IR camera with good sensitivity. The Sony high enders do that - it's a nice feature :) : I thought one of the MF backs was up into the low 40s in megapixels? : Maybe it's only 39. May still be pointless, but somebody made it and : people are buying it -- for rather a lot of money even. Oooooh! - 40Mp x 4 = 160Mp.. too much for me! ;) k