  We have searched, so far in vain, for brown dwarfs or giant planets in the
vicinity of several nearby stars using cameras built at Universite de Montreal
attached to the CFHT Adaptive Optics system. Here, we show how pairs of images
taken simultaneously through separate filters on, and off, the 1.6 micron
methane absorption band, can be used to completely defeat speckles, the
dominant noise source, while revealing cool brown dwarfs and giant planets in
high contrast. We achieve the photon shot-noise limit for data taken without a
focal plane mask but, so far, have had less success with data where the image
is occulted by a mask.
