ZWO 170-degree Replacement Lens

  • Use as an all-sky camera in combination with cameras that have a 0.5-inch sensor.
  • Focal Length: 2.5 mm.
  • Wide-angle: 170-degree lens.
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  • Regular price $22.00

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ZWO 170-degree Replacement Lens

The 170-degree Replacement Lens by ZWO for ZWO ASI cameras that have a 0.5-inch sensor size. It replaces the lens for the one that comes with the ZWO ASI178MM, ASI178MC, and ASI185MC cameras.

ZWO Note: This is a CS lens, it cannot be used on our cooled camera that has a focus distance of 17.5 mm.


Aperture1.25 mm (0.05")
Back Focus12.5mm
Camera/Eyepiece ConnectionMount
Dawes Limit92.8 arcseconds
Focal Length2.5 mm
Focal Ratiof/2
Free ShippingYes
Image Circle Diameter13mm
Limiting Magnitude4.2
Optical DesignCS lens
Tube Weight0.1 lbs