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Telescope Filter Drawer System with 2 Drawers

10 In Stock - Ships Today if Ordered by 2pm! (Tues - Fri)

We will price-match 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

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

Items that have been opened, damaged or are otherwise unsaleable will be subject to a minimum 10% restocking fee, to be assessed by Telescopes Canada upon receipt of the returned goods

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

Typographical Errors and Order Cancellations

Telescopes Canada reserves the right to cancel an order due to an error in pricing by Telescopes Canada or one of our suppliers, equipment being no longer obtainable, or other events which are out of our control.

Client-Initiated Cancellations

Client-initiated order cancellations are accepted prior to delivery of the equipment to the customer, thereafter it is a return.

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)