All AT and ET filters have sputtered coatings with square-wave passband shapes, high transmission levels, high out-of-band blocking, and lifetime warranties. 

  • AT Series: Designed for routine fluorescence detection and assays but without the zero-pixel shift performance of the ET filters. 

  • ET Series: Provide zero-pixel shift performance with steeper transition slopes, allowing excitation and emission filters to be placed closer spectrally. This results in brighter images better matching fluorophore peaks.

Yes, Cairn keeps stock of popular microscope cubes and fits new sets as standard.

Alternatively, they can remove glued-in filters from old cubes, clean them, and refit new filters for a small fee.

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