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.
  • Sale
  • Regular price $22.00

More on the Way* We do not currently have this in stock, but is a common item we carry. More are likely on the way as the manufacturer allows.
Free Shipping
Add to Wishlist
Already have gear? Trade it in for cash or new equipment.

Accessories Added

OPT Telescope Expert

Want Help?

Ask Our Telescope Experts


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