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Filter Centering Masks for Filter Wheels

Now being used in the Condor Array Telescope in Chile, a project by Stony Brook University and funded by the National Science Foundation!

New!  Filter Masks for Atik EFW2 and EFW2.2/3 filter wheels!

These Filter Centering Masks will make it easy to center your filters in a filter wheel, and will block any potential light leak due to the filters being off-center in the filter disk seat.   Simply place your filter in the filter wheel disk, place the Filter Centering Mask over the filter and fasten with screws.  

Filter Masks for ZWO wheels  work with any filter brand with the appropriate diameter.

Filter Masks for QHY wheels vary depending on the filter thickness (2mm or 3mm).

Filter Masks for Atik wheels - The Atik supplied O-rings must be used for 2mm thick filters.

Filter Masks for QSI wheels


ZWO Filter Wheel Masks:
QHY Filter Wheel Masks:
Atik Filter Masks:
QSI Filter Masks: