ZWO 2.5mm 170 degree lens

Product Description

Technical Parameter:

Format support: 1/2″ sensor

Focal length: 2.5mm

Wide angel: 170 degree

Compatible with the following camera models: ASI178MM, ASI178MC, ASI385MC

Our website is continuously updated with the most recent camera drivers as well as software for DSO and planetary imaging. Please make sure the most recent Driver and software have been installed before you start shooting:

It is also recommended to read the Manuals first before shooting.

Do you have question, answer or comment? Post here!

Mike – January 13, 2022:

Can I use it with ASI183MC ? If yes, what do I need ?

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- sara.liu – January 18, 2022:
  
  This lens is too small for ASI183MC, they are not compatible.
  
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Mike Turner – January 5, 2022:

Can this lens be used on the ASI120mm-S?

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- sara.liu – January 10, 2022:
  
  No.
  
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nik tillis – June 13, 2021:

can i use this with my ASI385MC?

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- sara.liu – June 16, 2021:
  
  Yep, this lens is compatible with ASI385MC.
  
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Toni Font – July 31, 2020:

This lens says “IR”. Whats the meaning? Does it mean it has IR-V embedded? Or it is IR transparent?
Thanks

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- ZWO.Moson – August 3, 2020:
  
  It means IR pass, this lens is suitable for night vision.
  
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Urs – September 7, 2019:

Is this lens fixed fous? It looks like the “focus” ring turns forever!

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- ZWO ASI Camera – September 9, 2019:
  
  no, it is not fixed fous.
  you could fix with the screwdriver whihe you adjust the focal length.
  
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Joel – September 2, 2019:

What is the purpose of the set screw? Can you move the lens element section in and out a bit to fine-tune back focus?

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- ZWO ASI Camera – September 2, 2019:
  
  This screw is used to fix the focus ring of the camera.
  
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Giritharan – May 22, 2019:

Does this lens have thread below for m25.4×0.75?

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- Katherine Tsai – May 22, 2019:
  
  No it doe not have.
  
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Huw – March 8, 2019:

Can I use this zwo-2-5mm-150-degree-lens on asi183mc color? if not, can you recommend a fisheye lens for asi183mc color? Thanks a lot!

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- Katherine Tsai – March 15, 2019:
  
  183 sensor is too big for fisheye lens.
  
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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?

Thanks!

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- Katherine Tsai – December 26, 2018:
  
  Sorry about that.
  It F1.2, as it is said on the front ring.
  
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33-4 – October 8, 2018:

If I use CS/C conversion adaptor , does this lense work with ASI290MM-Cool ?

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- Sean Wang – October 9, 2018:
  
  290mm-c work with CS mount, will support C type lens, because the back focus is 17.5mm
  
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Hide – August 4, 2018:

Doesn’t work with any cooled camera including ASI178MC-Cool?

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- Sean Wang – August 6, 2018:
  
  Yes, that’s correct.
  
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Brian – November 18, 2017:

Does this lens work with the new ASI385MC? Also… what is the focal ratio?

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- Sam Wen – November 21, 2017:
  
  this lens come with ASI385MC
  it’s F2
  
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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

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- Sam Wen – October 9, 2017:
  
  this lens is CS lens, cannot be used on our cooled camera whose back focus distance is 17.5mm
  
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Jaeong – September 10, 2017:

Can I use this lens for ASI224MC? I wanna make all sky camera.

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