"There's been a strong move in the camera industry lately to remove low-pass filters (aka anti-aliasing filters or LPFs) from cameras, in pursuit of greater image sharpness... At IR, we feel strongly that eliminating low-pass filters is a bad idea, and a mistake for the industry. While the vast majority of natural subjects aren't subject to aliasing and moiré issues, many man-made objects have the sort of regular patterns that trigger the problem."
Imaging Resource supports its claim by real-world examples shot by one of the recent cameras with no optical anti-aliasing filter:
|Example of color aliasing, caused by the fine thread patterns in the model's outfit.|
|Example of luminance moiré in the form of the swirly lines|
in what should be diagonal louvers on the building's front.