Atik 383L+ thread type

[Antonio_Agudo]

Hello everyone. This topic may already be covered, but I haven't been able to get it on the forum.

Do you know what type of thread (female) the Atik 383L+ has? Is T2 or M42?

I want to connect a filter slider changer and I need to know the thread type.

In the technical information of the CCD put thread of front M42x0.75 but I have read that T2 metric is 42 mm with a thread pitch of 0.75mm and M42 metric is also 42mm, but with a 1mm thread pitch.  That's why my doubdt.

Thanks in advance.