TS Optics Bahtinov Focusing Mask 105-150 mm
A sharp astrophoto starts with precise focus - and that is exactly where a Bahtinov mask makes all the difference. This plastic mask fits over the front aperture of your telescope or camera lens and helps you achieve perfect focus before you start a single exposure. The TS Optics focusing mask is designed for telescopes and lenses with an outer diameter of 105 mm to 150 mm. Its simple principle and reliable construction have made it a popular tool among astrophotographers around the world.
How the Bahtinov mask works
The mask takes its name from its inventor, Pavel Bahtinov, who came up with an elegant solution to the problem of precise focusing in astrophotography. The grid of the mask splits the incoming light from a star into three diffraction spikes, which are clearly visible on your camera display in live view mode. When focus is off, the central spike shifts away from the other two. Once all three spikes meet at exactly one point, you have reached perfect focus - no guesswork, no repeated test shots.
Quick and secure attachment
Attaching the mask takes only a few seconds. Each mask comes with three screws. Remove the plastic caps, pass the screws through the corresponding holes in the lens or focuser, and replace the caps. The mask sits firmly and safely in place without any risk of damage to the optics. Once you have achieved focus, simply lift the mask off and your telescope is ready to shoot.
Simple to use - even for beginners
The focusing process is straightforward and easy to follow, even if you are new to astrophotography. Point your telescope at a bright star, switch on your camera and activate live view. Watch the diffraction pattern on the display and adjust the focuser until the central spike aligns precisely between the other two. The result is immediate - precise focus for astrophotography with no compromise. Remove the mask and start imaging your target.
Technical specifications
| Parameter |
Value |
| Compatible outer diameter |
105-150 mm |
| Material |
Plastic |
| Attachment |
Three screws with protective caps |
| Focusing method |
Bahtinov diffraction pattern |
| Compatible use |
Telescopes and camera lenses |
Who is this mask for?
The TS Optics Bahtinov mask suits anyone who wants to improve the sharpness of their astrophotos quickly and reliably. Whether you are just starting out or already have some experience, this tool removes one of the most frustrating steps in astrophotography - achieving accurate focus in the dark. It is a small accessory that makes a visible difference in every image you take.
