Description
The Orion PinPoint Bahtinov mask provides a visible focusing reference for astrophotography. Choose the size that fits your telescope's front cell or dew shield.
Choose your size
Measure the outside diameter where the mask attaches, not the telescope's optical aperture.
| Orion part number | Outside diameter range |
|---|---|
| 40005 | 78–113 mm |
| 40008 | 138–173 mm |
| 40009 | 158–193 mm |
| 40010 | 178–213 mm |
| 40013 | 268–303 mm |
Fitting and focusing
- Attach the three rubber-sleeved grip posts using the supplied thumbscrews.
- Place the mask over the telescope's front opening. Slide the posts inward, centre the mask, and tighten the thumbscrews for a secure fit.
- Aim at a bright star and view the diffraction spikes through your camera or imaging software.
- Adjust focus until the middle spike passes exactly through the intersection of the other two spikes.
- Remove the mask before taking your images.
For planetary imaging, focus on a star first, then move to the planet.
Included and care
One mask in the selected size, three grip posts and thumbscrews. Handle gently and store flat; excessive bending can crack the mask.
Additional Resources