Focus on more important matters with the aid of a bahtinov mask.
A bahtinov mask produces a distinctive spiked pattern on a bright star - you'll know when the focus is perfect when the third spike moves into the center. No guessing anymore!
Designed to work specifically with the Rokinon/Samyang 135mm F2 lens, using a high bahtinov factor of 100 (higher factor produces a sharper pattern).
- 1x Bahtinov mask (93.5mm inner diameter)
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