Are the Tak diagonals threaded to accept filters? I have both the 2" and 1.25" Tak diagonals and though they look threaded, they don't seem to allow filters to be smoothly screwed on. In otherwords, the filters seem to thread on rather tightly (abnormally so).
Mortal as I am, I know that I am born for a day. But when I follow at my pleasure the serried multitude of the stars in their circular course, my feet no longer touch the earth.
- Ptolemy,c.150 AD