Artesky Tri-Bahtinov 90 mm mask (SKU: TRI-BAHTINOV-90)

Artesky Tri-Bahtinov 90 mm mask (Artesky, SKU: TRI-BAHTINOV-90) helps set focus for astrophotography. Placed in front of the objective or tube opening, it creates a diffraction pattern around a bright star; the pattern’s symmetry helps identify the correct focuser position.

Key features

• item: Tri-Bahtinov pattern for evaluating focus
• reference pattern viewed on a camera or imaging display
• attachment using three screws

Included items

• item: Tri-Bahtinov mask
• three mounting screws

Technical specifications

• type: Tri-Bahtinov diffraction mask
• tube-diameter variant: 90 mm
• selection: according to the outside tube diameter at the mounting position

The clear diffraction pattern helps set focus before starting an imaging sequence.