TS-Optics Bahtinov focusing mask — 85–120 mm outside diameter This Bahtinov mask fits telescope dew shields or camera lenses with an outside diameter from 85 to 120 mm. Select it by the physical attachment diameter, not the optical aperture.
Manufacturer model: TS-Optics Bahtinov focusing mask — 85–120 mm outside diameter · Specifications checked against manufacturer data on 2026-11-04
This Bahtinov mask fits telescope dew shields or camera lenses with an outside diameter from 85 to 120 mm. Select it by the physical attachment diameter, not the optical aperture.
Fit the mask, point at a suitable star and view the diffraction pattern on the camera. Adjust focus until the central spike sits midway between the other two spikes, then remove the mask before recording the target.
The black plastic mask is secured by three screws with protective covers. Use this stated fitting range for the supplied size.
TS-Optics manufacturer documentation
Exact named TS manufacturer model and its published technical table checked. Unpublished dimensions, capacities and package items are not inferred.
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TS-Optics Bahtinov focusing mask — 85–120 mm outside diameter This Bahtinov mask fits telescope dew shields or camera lenses with an outside diameter from 85 to 120 mm. Select it by the physical attachment diameter, not the optical aperture.
Manufacturer model: TS-Optics Bahtinov focusing mask — 85–120 mm outside diameter · Specifications checked against manufacturer data on 2026-11-04
