ZWO 2" to 1.25" Filter Adapter Ring

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Agena note: Please note that the outside diameter of this adapter is 51mm. Hence, it cannot be used to attach 1.25" filters to standard 2" accessories (such as 2" eyepieces) since this adapter is a bit too large to fit inside 2" (50.8mm) holders.
Original ZWO description below:
The filter adapter ring that allows you to use the filter with a smaller filter thread size. No need for buying another set of filter drawers, the 2”-1.25”filter adapter ring will help you directly fit the 1.25”filter onto 2” filter drawer or filter wheel.
Supported list:
- ZWO 5×2”EFW
- ZWO 7×2” EFW
- ZWO filter drawer series, including M42 filter drawer and M54 filter drawer
We recommend you use ASI533, ASI183, ASI294 and ASI1600 with this filter adapter ring since cameras with bigger sensors may lead to vignetting when matching the 1.25” filters.
Specifications:
- Thread:
- Outer M48x0.75 male thread
- Inner M28.5x0.6 female thread
Other Information
- Country of Manufacture: China
Agena note: Please note that the outside diameter of this adapter is 51mm. Hence, it cannot be used to attach 1.25" filters to standard 2" accessories (such as 2" eyepieces) since this adapter is a bit too large to fit inside 2" (50.8mm) holders.
Original ZWO description below:
The filter adapter ring that allows you to use the filter with a smaller filter thread size. No need for buying another set of filter drawers, the 2”-1.25”filter adapter ring will help you directly fit the 1.25”filter onto 2” filter drawer or filter wheel.
Supported list:
- ZWO 5×2”EFW
- ZWO 7×2” EFW
- ZWO filter drawer series, including M42 filter drawer and M54 filter drawer
We recommend you use ASI533, ASI183, ASI294 and ASI1600 with this filter adapter ring since cameras with bigger sensors may lead to vignetting when matching the 1.25” filters.
Specifications:
- Thread:
- Outer M48x0.75 male thread
- Inner M28.5x0.6 female thread
Agena note: Please note that the outside diameter of this adapter is 51mm. Hence, it cannot be used to attach 1.25" filters to standard 2" accessories (such as 2" eyepieces) since this adapter is a bit too large to fit inside 2" (50.8mm) holders.
Original ZWO description below:
The filter adapter ring that allows you to use the filter with a smaller filter thread size. No need for buying another set of filter drawers, the 2”-1.25”filter adapter ring will help you directly fit the 1.25”filter onto 2” filter drawer or filter wheel.
Supported list:
- ZWO 5×2”EFW
- ZWO 7×2” EFW
- ZWO filter drawer series, including M42 filter drawer and M54 filter drawer
We recommend you use ASI533, ASI183, ASI294 and ASI1600 with this filter adapter ring since cameras with bigger sensors may lead to vignetting when matching the 1.25” filters.
Specifications:
- Thread:
- Outer M48x0.75 male thread
- Inner M28.5x0.6 female thread
Other Information
- Country of Manufacture: China

ZWO 2" to 1.25" Filter Adapter Ring
