This time I have 2 x 4" (90 - 106mm) laser cut acrylic Bahtinovs from Morris Engraving in the UK.
One is f/8, the other f/5.6. F/5.6 SOLD
I have reused my image of my recently sold 80mm Bahtinov, because they essentially look the same. NO cord this time, but there will be at least 1 set of nylon dewshield pegs.
Perfect fit over the Tak FS-102 or any with same dewshield outer diameter (FSQ-106N, old model FC-100, Vixen FL-102S, Skywatcher ED-100).