Found 2 3D-models for “135 mm Bahtinov” across many websites

#Telescope focus mask#135 mm Bahtinov#bahtinov mask#astrophotography#Focus Tool#bahtinov insert
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Bahtinov focus mask Insert

Bahtinov focus mask Insert

ThingiverseThingiverse
Bahtinov Insert

Bahtinov Insert

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