Product Description
ZWO 2-inch Filter Drawer with 21mm ring design is independently developed by ZWO, which includes M42 * 0.75 male thread (camera side) and M48 * 0.75 female thread (filter end), M48 * 0.75 female thread (telescope side) as well.
The double strong magnets create stronger adsorption, easier installation and pulling out. 
There is a lock screw on the side of it. The locking function is helpful on adjusting the tension to eliminate the gap, which is a double insurance for users.
With the ability of double strong magnetic adsorption, it is more convenient and much easier to install or pull out the filter.
The filter drawer also comes with the M48-M42 adapter. You can use it with your camera or your telescope.
Mechanical Drawing
66mm(height)*66mm(length)*21mm(thickness)
M42 * 0.75 male(external) thread (camera side)
M48 * 0.75 female(internal) thread (filter end)
M48 * 0.75 female(internal) thread (telescope side)
Suitable for 2-inch astronomical filters
Shipping
Fast Shipping: we will choose DHL, UPS, FedEx etc to deliver it. Usually you will get your package within 15-20 days.
- Fast Shipping(amount ≧ 199USD) for free
- Fast Shipping(amount < 199USD) : $30.00 (We do not provide free shipping from now on.)
Introduction
- It will take around 60-90 days for shipment via ePacket/China Post Registered Air Mail/EMS, which can’t be guaranteed due to force majeure. If you can’t get the air mail package after 2months, please let us know ASAP: info@zwoptical.com
- Customers from Brazil and Chile should leave a message to provide your CPF or CNPJ as your custom needs it.
- Customers from Russia need to provide the complete English name with three words as well as the English shipping address.
Tracking site
DGM: http://webtrack.dhlglobalmail.com/?locale=en-US
China air mail: http://www.17track.net/en
Tax
- The price list on our website is USD without tax.
- Please note that buyers are liable to pay tax involved, such as Import tax, VAT , customs handling fee, etc. The additional fees may be collected at time of delivery by courier.
- For best local service we advise customers buy our cameras form local dealers.
Warranty and Return Policy
1. ZWO hereby declares that it will provide customers with a warranty period of 2 years for ZWO branded products (excluding APO), as per this policy. APO products will be covered by a 1-year free warranty service, starting from the day following the receipt of the product by the customer. For ASIAIR Plus users, the warranty period will commence from the day of device activation.
Furthermore, ZWO will offer customers a 1-year free warranty service (Warranty Period) for Seestar branded products purchased from ZWO, in accordance with this policy. The warranty period will begin from the day following the receipt of the product by the customer.
2. If a User encounters the following Dead on Arrival (DOA) and contacts ZWO within the corresponding time limit to issue the Product purchase invoice and relevant evidence, ZWO will provide door-to-door pick-up service and, as appropriate, after-sale replacement (or partial replacement), repair or return (or partial return) service for the following Products:
1) Product quality problem
Provided that a User detects a quality problem and contacts ZWO within 30 days after receipt of the Products, and ZWO support team confirms that the Products indeed have a quality problem or defect after their inspection, ZWO will provide free replacement service towards such Products;
2) Product transportation problem
Provided that a User finds obvious signs of bubbling, serious overstocking, or deformation on the outer package of the Products upon receipt of the Products, and provides ZWO with pictures of the outer package and proof of receipt within 3 days after receipt of such Products, ZWO support team will verify the actual shipper and determine the responsible party for such transportation problem. In the event that ZWO is the actual shipper, ZWO will be responsible for providing the relevant return or replacement service, however, if the Products are directly sold or transported to the User by an agent of ZWO, the agent will be responsible for providing the relevant return or replacement service.
3. If the Products are under the following circumstances, they are not within the scope of warranty service, ZWO may provide maintenance services to the Users:
1) The Warranty Period of the Products has expired; or
2) The Products are injected into liquid or affected by moisture or corrosion; or
3) The Products are damaged by an external force (such as the broken of the camera protection window glass, the deformation of the product shell, the broken of the USB port, etc.); or
4) Disassembling, repairing by a third party, refurbishment of the Products (such as downloading erroneous firmware) without the written authorization of ZWO; or
5) The product system is modified, or the maintenance notice is lost or changed; or
6) Product quality problem caused by installation not following the requirements or instructions for the Products; or
7) Physical damage or failure of the Products caused by the force majeure (such as strong vibration or extrusion such as flood, fire, earthquake, or thunder stroke); or
8)Damage caused by the improper User operation during the period of shooting or use, such as using without the equipment protection or direct shooting of the sun; or
9) No valid purchase invoice or warranty certificate; or
10) The Products are second-hand products.
Any quality problem with the accessories or other parts of the Products is not a condition for the return or change of the Products, and the User may solely request to replace the accessories with new ones, which shall be handled after verification by ZWO support team.
If the issue with your ZWO product was caused by certain damage (such as severe damage not covered by the 2-year warranty), you might have to pay the replacement value.
4. For the normal repair or replacement of the Products during the Warranty Period, the User will bear the return cost. When returning the Products, Users shall specify the actual reasons for the damage to the Products, and shall provide the corresponding valid certificates, such as pictures or videos, etc.
For the Products that need to be replaced after being confirmed by ZWO in writing, the User shall return the Products with the complete package, together with all accessories, manuals, etc., to the address designated by ZWO.
By sending back the product to ZWO, the User agrees to pay out-of-warranty fees that may arise during the repair process of the product. ZWO will send back the product after charging.
5. If a User encounters any problem during the use of ZWO Products, you may at any time contact ZWO for technical support via ZWO Support.
For the Products that need to be returned for after-sales service, ZWO will provide the corresponding RMA code for reference.
ZWO will not accept any products having no RMA code that have been returned privately without ZWO written confirmation.
6. If a User purchases the ZWO Products from a ZWO agent, the User may contact the ZWO agent directly for the relevant after-sales service.
Walter – :
Fits the drawer proper with a mounted Baader 8 mm Filter?
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Katherine Tsai – :
It should work, you may have a try if you have one.
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Aaron – :
Will this work with the ZWO ASI294? I’ll be running that on a Zenithstar 81 and I want to be able to drop in a duo NB filter. Also, can you recommend the correct filter for me to use with that please?
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Moson – :
Yes, this M42 Filter Drawer can work with ASI294MC. This Filter Drawer is suitable for 2″ filters. There is the link for your reference:https://astronomy-imaging-camera.com/product/zwo-duo-band-filter
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Jeffrey Horne – :
Does this work with the ASI2600 and the RASA 8?
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Moson – :
This filter drawer can connect the telescope which has M42 or M48 thread. Make sure the RASA 8 has the same thread.
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Ralf Szymkowiak (verified owner) – :
Can we buy additional drawers? I would like two
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Moson – :
Yes, of course. You could enter the purchase quantity before placing an order.
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Martien van Hout – :
Can it be used with The William Optics Spacecat ?
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Moson – :
Sorry we didn’t try it before. But you can judge it by the mechanical drawing that in our website.
If it success, please feel free to tell us. Thanks in advanced!
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Han – :
if I backorder it now, how long does it take ? Just roughly is okay
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Moson – :
You can order it on our website now.
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Patrick – :
Is there any update about when these will be available? Thanks!
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Moson – :
You can keep focus on the news on our website.
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Chaspierce – :
When might these be available for order thanks,Chuck
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Katherine Tsai – :
We expected this to be available around March.
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Gregory Giuliani – :
Can it be used with the EOS Lens Adapter for EFW?
Many thanks
Greg
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Katherine Tsai – :
It cannot.
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Jeffrey Horne – :
It would be awesome if we could buy a second (or third) filter holder, so we could easily switch out filters in the drawer without having to unscrew the old filter and screw in a new one. 😊
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Katherine Tsai – :
Thank you for the feedback! We will add it soon.
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Jay Hinrichs – :
How do I order extra drawers for the ZWO 2″ Filter Drawer (M42)?
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Katherine Tsai – :
We do not have this yet but I will convey your feedback to the related departs.
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David – :
and finally would the OAG obstruct the drawer or is it threaded such that it comes out at 90 degrees to the OAG?
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Katherine Tsai – :
It will not obstruct the drawer.
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David – :
This will replace the 21mm spacer in the imaging train, correct?
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Katherine Tsai – :
Yes.
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David Fabrizio (verified owner) – :
I don’t see extra drawers listed for the filter slider.
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Katherine Tsai – :
Sorry I did not understand your meaning before. Could you tell me what kind of filter slider do you want? We can add that to our to do list.
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Ajay – :
Can this be used with ZWO OAG and ASI 294?
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Katherine Tsai – :
The extension distance of this filter drawer is 20mm. You may need to consider this.
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Andrew Lesser – :
Can we buy additional drawers? I would like two
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Katherine Tsai – :
You can purchase two of them.
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david – :
Is this usable with mounted filters?
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Katherine Tsai – :
Yes it has thread on it.
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André Cajolais – :
I imagine the possibility of vignetting is strong… will we be able to buy drawers separately… on Hyperstar it would be really nice to to RGB
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Katherine Tsai – :
This adapter can be pruchased separately.
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David Hins – :
Will this filter drawer work with a Celestron RASA8 and a ASI294MC?
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Katherine Tsai – :
It is also a 21mm extension ring, if you use 21mm before then you can use it with ASI294 and RASA8 as well.
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André Cajolais – :
Good news! Will filter drawer be available soon? Will there be a 1 ¼in drawer available? Will it be possible to buy drawers alone?
Many thanks
AC
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Katherine Tsai – :
Sorry there will not be a 1.25″ filter drawer.
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