A TriBahtinov mask operates under the same principle as the Bahtinov mask
for focusing and adds the ability to collimate scopes with collimatable
The design is based on Cytan's idea, documented on his Github site here, and the sketch was made using Satoru Takagi's Mask Generator.
The mask has a raised center for an easy grip and comes in three sections that snap fit together and can be taken apart for easier storage (C5 is one piece, 14" and larger are 6 sections).
2-3 day Priority shipping available also.
International shipping calculated at checkout.**
Ships in 3-4 days.
Printed in durable, temperature tolerant PETG filament.
**International shipping note: most USPS First Class packages arrive in about 2 weeks, but can take as long as 6 weeks.
Please see Cytan's wiki page.
**For Hyperstar versions, the center hole accommodates the Hyperstar, and will not go around cameras that are wider than the Hyperstar body. In such cases the camera must be removed for installation and removal of the mask.