User guide

Q S I 5 0 0 / 6 0 0 S E R I E S U S E R G U I D E

Installing or removing 31mm color filters

Some QSI 500/600 Series Color Filter Wheels are configured to hold unmounted 31mm

filters. Filter wheels capable of holding 31mm unmounted filters have a screw hole between

each filter position.

Note the retaining screws in the image above between each filter position which hold the

unmounted 31mm filters in place.

Different retaining screw/washer combinations are used to hold different thickness filters.

Filters up to 3mm thick (e.g. Astrodon, Astronomik) use the configuration shown above to

the left. 5mm thick IDAS filters use the configuration to the right.

Note: A thin spacer or O-ring may be required to be placed under unmounted

filters that are less than 3.5mm thick in order to raise the top surface of the filter

above the top of the filter wheel recess so the retaining screw can hold the filter

firmly in place. The correct spacer should have been supplied with your filters or

filter wheel.