How can I tell or confirm whether I have the newer version of the ZWO 2inch Ha filter? I have attached two photos taken from alternate sides. The closest I can ascertain is the blue tinge on one side which is similar to the older version on ZWO's comparison page (https://astronomy-imaging-camera.com/product/zwo-new-narrowband-31mm-filter)
I think halo can give you the affirmative answer.
I have only managed one night and a very short time with clear sky to get the below image, the brightest star in the image does have a very noticeable halo and this is what prompted me to check/ask.
eco500 Apparantly, you are using the old one.
Thank you for the prompt replies and confirmation.
