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Telescope Filter Drawer System with 2 Drawers

4 In Stock - Ships Today if Ordered by 2pm EDT! (Mon - Fri)
$139 CAD
We will price-match in-stock Canadian astronomy dealer pricing


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This all-metal filter drawer system allows you to quickly change filters without adding a bulky filter wheel to your system.

The drawers are magnetically locked into place, creating a good seal against moisture and avoiding accidental drops.

Filters up to 7mm in thickness (not including threads) are supported.  The 2-sided filters from Optolong will work in this drawer.

2 filter drawers are included, along with optionally used spacing rings.  Additional drawers can be ordered.  The manufacturer has recently changed the spacer ring material to metal.

The drawer system weights about 100g.

The camera side of the filter has male M42 threads, while the scope side has female M48 threads.  The M42 threads will thread into most cameras without an adapter.

The body of the filter slide takes up 16.5mm of back-focus in the imaging train.

For purchasing additional filter drawers, please Click Here

Questions & Answers

  • What is the thickness of this product? I am trying to determine if I have enough space in front of the field flattener for it, with the given amount of exposed focus tube. I think it will be fine, but I would prefer to do the math before I make the purchase. Thank you,

    Hi Karl,
    The drawer is 16.5mm thick.  If you need a little extra space consumed, the ZWO filter drawer consumes about 20.5mm

  • Stephan, is this filter drawer as good as the zwo one?

    We've used both filter drawers and have found that they are both excellent.  This drawer is solidly built and creates a surprisingly good airtight seal when closed (it has magnets to keep the drawer in place)