Now being used in the Condor Array Telescope in Chile, a project by Stony Brook University and funded by the National Science Foundation!
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. Sold in sets of 7, 8 or 9 depending on the filter mask size.
Available for ZWO, QHY, Atik, QSI, Moravian (GXCCD) and Pegasus Indigo filter wheels.
Filter Masks for ZWO wheels
Works with any filter brand with the appropriate diameter.
All filter brands: ZWO-50mm
All filter brands: ZWO-36mm
All filter brands: ZWO-31mm
Filter Masks for QHY wheels
These vary depending on the filter thickness (2mm, 3mm or 5mm)
50mm square filters (all brands): QHY-50mm-SQ
Chroma, Baader, Astronomik, Antlia, Optolong etc: QHY-50mm-3mm
QHY-50mm-5mm: NOTE: 5mm thick filters
Chroma, Astrodon, Astronomik: QHY-36mm-3mm
Baader, Antlia, Optolong, ZWO: QHY-36mm-2mm
All filter brands, 3mm thick filters: QHY-31mm-3mm
All filter brands, 2mm thick filters: QHY-31mm-2mm
All brands now use 3mm thickness for 50mm filters, but some brands previously sold 2mm thick 50mm filters: (QHY-50mm-2mm)
Filter Masks for Atik Wheels
The Atik supplied O-rings must be used for 2mm thick filters.
All filter brands, EFW2.2 and EFW3 wheels: Atik-EFW3-50mm
All filter brands, EFW2.2 and EFW3 wheels: Atik-EFW3-36mm
All filter brands, EFW2 wheel: Atik-EFW2-36mm
Filter Masks for QSI wheels
Chroma, Baader, Astronomik, Antlia: QSI-50mm-3mm
Astrodon: QSI-49.7mm-3mm
All brands now use 3mm thickness for 50mm filters, but some brands previously sold 2mm thick 50mm filters: (QSI-50mm-2mm)
Printed in durable, temperature tolerant PETG filament.
Installation Note: make sure the two flat sides of the mask point toward the center.
