ZWO 2.5mm 170 degree lens
Format support: 1/2″ sensor
Focal length: 2.5mm
Wide angel: 170 degree
Match Model：ASI178MM, ASI178MC, ASI185MC
Before first usage of this product read manuals and install correct drivers and software.
Arvid – December 24, 2018:
Sam Wen said: “it’s F2”
But it says 1:1.2 on the front ring! Is that wrong? The light gathering capability difference between these numbers is huge; an f/1.2 lens gathers about 2.8 times more light than an f/2.0 lens! So which is it?
Also, what does the “IR” signify? That it is transparent at IR wavelengths, or that it cuts IR?
Katherine Tsai – December 26, 2018:
Sorry about that. It F1.2, as it is said on the front ring.
33-4 – October 8, 2018:
If I use CS/C conversion adaptor , does this lense work with ASI290MM-Cool ?
Sean Wang – October 9, 2018:
290mm-c work with CS mount, will support C type lens, because the back focus is 17.5mm
Hide – August 4, 2018:
Doesn’t work with any cooled camera including ASI178MC-Cool?
Sean Wang – August 6, 2018:
Yes, that’s correct.
Brian – November 18, 2017:
Does this lens work with the new ASI385MC? Also… what is the focal ratio?
Sam Wen – November 21, 2017:
this lens come with ASI385MC it’s F2
Sandra (verified owner) – October 8, 2017:
I’d got one for a ASI178MM-Cool and can’t reach focus. I used the T2 To CS or C adapter adapter I appears to say it should work with the ASI178MM what am I missing
Sam Wen – October 9, 2017:
this lens is CS lens, cannot be used on our cooled camera whose back focus distance is 17.5mm
Jaeong – September 10, 2017:
Can I use this lens for ASI224MC? I wanna make all sky camera.
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