TS Optics Bahtinov Focusing Mask for 250–290 mm Outer Diameter | PixelSkiesAstro
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  • TS Optics Bahtinov Focusing Mask for 250–290 mm Outer Diameter | PixelSkiesAstro
  • TS Optics Bahtinov Focusing Mask for 250–290 mm Outer Diameter | PixelSkiesAstro

TS Optics Bahtinov Focusing Mask for 250–290 mm Outer Diameter

39,00 €
TTC

TS-Optics Bahtinov focusing mask — 250–285 mm outside diameter This Bahtinov mask fits telescope dew shields or camera lenses with an outside diameter from 250 to 285 mm. Select it by the physical attachment diameter, not the optical aperture.

Manufacturer model: TS-Optics Bahtinov focusing mask — 250–285 mm outside diameter · Specifications checked against manufacturer data on 2026-11-04

TS-Optics Bahtinov focusing mask — 250–285 mm outside diameter

This Bahtinov mask fits telescope dew shields or camera lenses with an outside diameter from 250 to 285 mm. Select it by the physical attachment diameter, not the optical aperture.

Focusing procedure

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.

Construction and fit

The black plastic mask is secured by three screws with protective covers. The manufacturer’s upper limit is 285 mm; fit at 286–290 mm is not specified, despite the existing store title.

TS-Optics manufacturer documentation

Compatibility notes

Manufacturer fitting range is 250–285 mm outside diameter. Store title says 250–290 mm and is unchanged; fit at 286–290 mm is not claimed.

56839

Fiche technique

Fixation
Three screws with protective plastic/rubber covers
Plage de diamètre extérieur (mm)
250–285
Article
Bahtinov Mask
Équipement indiqué par le fabricant
TS Bahtinov Mask 3 screws covered in rubbery plastic for attachment
Référence fabricant
TSBahtinov250
Matériau
Plastic
Modèle
TS-Optics Bahtinov focusing mask — 250–285 mm outside diameter
Usage
Camera focusing on a star using a diffraction pattern
Convient pour
Telescopes and lenses with 250-285 mm diameter

Références spécifiques

MPN
TSBahtinov250
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