TS Optics Bahtinov Mask 65-100 mm Focusing Aid
A sharp image of the night sky starts before you press the shutter - it starts with precise focusing. The TS Optics Bahtinov mask is a simple, effective tool that makes this step much easier. The plastic mask fits directly onto the front of your telescope or camera lens. Its grid pattern gives you a clear visual signal the moment your optics are in perfect focus. It is suitable for telescopes and lenses with an outer objective diameter of 65 to 100 mm.
How the Bahtinov mask works
The mask is named after its inventor, Pavel Bahtinov, a Russian amateur astronomer who described this elegant focusing method in the early 21st century. The principle is straightforward. The grid creates a pattern of three light spikes around a star. When the central spike does not align exactly with the two outer spikes, the focus is off. As soon as all three spikes meet at a single point, you have reached perfect focus. The Bahtinov mask for astrophotography replaces guesswork with a clear, reliable visual indicator - no more uncertain focus by eye.
Easy attachment - no tools needed
Attaching the mask to your telescope or camera lens takes only a moment and requires no tools. Each mask comes with three screws fitted with plastic caps. Simply remove the caps, pass the screws through the corresponding holes in the mask, and replace the caps. The mask sits firmly in place and is ready to use straight away.
Better results in less time
Precise telescope focusing with the Bahtinov mask saves you time during setup and noticeably improves the quality of your images. Whether you are photographing planetary nebulae, star clusters, or galaxies, correctly focused optics are always the first step towards a successful shot. The mask is lightweight and compact - it fits easily into any astrophotography bag.
Key specifications
| Parameter |
Value |
| Compatible outer diameter |
65-100 mm |
| Material |
Plastic |
| Attachment method |
Three screws with plastic caps |
| Tools required |
None |
| Suitable for |
Telescopes and camera lenses |
| Use |
Astrophotography focusing |
Who is this mask for?
The TS Optics Bahtinov mask suits anyone who photographs the night sky - from beginners taking their first astrophotos to experienced observers who want a faster, more reliable way to achieve critical focus. If your telescope or camera lens has an outer diameter between 65 and 100 mm, this mask is ready to work with your equipment.
