FAQs
The filter can be used on wide-angle lenses, but the visibility of the Bahtinov focusing pattern varies with focal length.
For best results, we recommend lenses of 50mm or longer.
• 50mm+ — Best performance
• 24–50mm — Generally works well
• Below 24mm — The diffraction pattern may be weaker and harder to observe depending on the lens and shooting conditions.
The longer the focal length, the easier it is to see and use the focusing pattern.
Yes, it's ok for a zoom lens. The longer the focal length, the better the performance.
Yes, the filter has the thread to fit into the lens.
Yes. The filter should be removed before taking the exposure.
Yes. If your step-up rings go from 82mm to your lens diameter and the 82mm side uses the standard 82 × 0.75mm thread, they will fit properly.
This option includes one 82mm Star Focus Filter and a set of 8 adapter rings:
49mm, 52mm, 55mm, 58mm, 62mm, 67mm, 72mm, and 77mm.

