So, for those of you that read yesterday’s post about the X-Pro 1, you may have noticed that Fuji was talking up its “APS-C X-Trans CMOS sensor.” A little further reading on their product page reveals why this is worth its own branding term.
So, if any of you remember Fuji’s work on their EXR sensors, you’ll know that Fuji isn’t necessarily a believer in traditional sensor arrangements based on the Bayer filter pattern. And, it seems like they’ve put their lab coats back on, fired up the tesla coils,and resumed their mad science ways, because the X-Trans sensor even more completely eschews the conventional wisdom of the Bayer filter, instead emulating the natural randomness present in the grains of silver halide film.
Say huh?
OK, for those not familiar with the Bayer filter, here’s the idea: the pixels on your sensor just see light. White light. They don’t really care about color. Mostly, we do, so, we use a filter over each pixel to limit it to collecting only one of the three primary colors: red, blue, or green. The Bayer filter is the long-standing champ at this, using alternating rows of 2×2 pixel overlays. Then, in the camera, clusters of 3 pixels are interpolated together to form one pixel with all three colors. The Bayer filter looks like this:
And, mostly, the Bayer filter works. But, it has a couple problems. One is that interpolating those pixels causes a phenomenon known as moiré. Moiré is an effect most notable in fine, repeating patterns and shows up as unexpected and (often) undesired random swirls in the photo.
To combat this, cameras employ what’s known as a low-pass filter. This reduces moiré, but also takes a toll on fine sharpness and details, as it averages out multiple pixels. Additionally, this averaging can lead to a slight false color in spots, as it mixes neighboring pixels.
Fuji’s new X-Trans filter uses a 6×6 “aperiodic” arrangement for its pixels, which uses natural random interference to break up the moiré effect, which completely removes the need for a low-pass filter, and–in theory–yields naturally sharper images with truer colors.
Neat, huh? We think so too. Now, though, it’s all down to the proof-in-the-pudding once this thing comes out and see if it lives up to its own theory.














Sometimes the possibility of getting wet is the last thing on your mind. I mean dead last, not even occurring to you, stop afterward with the dripping wet shell of a formerly valuable electronic device in your hand and a sinking ball of regret infesting your stomach. You know what I mean? Sometimes there are just more important things in life. Like bikini girls. OK, or waterfalls, sue me for being particular to bikini girls though.

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