Jump to content

30sec_exposures_2021.jpg.48851b1871a4bf9500ebd53c3e790d81.jpg

 

 

Dimensions of the glass cell in a 2" filter?


StuartJPP
 Share

Recommended Posts

Can anybody confirm the dimensions of the glass cell within a 2" filter? Preferably a 2" Baader 7nm Hα filter since the cell is removable (but any should do). Or can someone measure it for me if they have one?

There is a drawing from Astronomik here...

http://www.astronomik.com/media/download/ZG_Fass_2z_web.pdf

...but it is not clear to me what is metal, glass, thread, retaining ring or air...The aperture is maximum 44mm. The glass looks like 0.6mm thick and 46mm in diameter, yet all their blurb says 1mm thick...it is 2.2mm from the front of the filter holder to the centre of the filter glass cell...if not, these people need to produce less ambiguous drawings :p

Thanks in advance!

Link to comment
Share on other sites

Nobody's got a 2" filter and a vernier then  :shocked: 

All I need is the diameter of the exposed glass of the filter (aperture)...you don't have to dismount it or anything...even a ruler will work if you haven't got a vernier.

If you can interpret the above diagram looking at a filter I'd appreciate that more...but the diameter of the glass will do for now...

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.