  Imaging spectroscopy is intended to be coupled with adaptive optics (AO) on
large telescopes, such as EST, in order to produce high spatial and temporal
resolution measurements of velocities and magnetic fields upon a 2D FOV. We
propose a Multichannel Subtractive Double Pass (MSDP) incorporated to the EST
visible and IR spectrographs, using new generation slicers (56 channels, high
spectral resolution) which will benefit of AO and polarimeters. The aim is to
produce 56-channel spectra images with the spatial resolution of the AO and
reconstitute cubes of instantaneous data (X, Y, lambda) at high cadence,
allowing the study of the plasma dynamics and magnetic fields. The MSDP is
compatible with most polarimetric methods (we shall discuss only two of them).
