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TriBahtinov Mask for Collimation and Focus

A TriBahtinov mask operates under the same principle as the Bahtinov mask for focusing and adds the ability to collimate scopes with collimatable optics.  
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).  


FREE SHIPPING (USA) (1st Class)

2-3 day Priority shipping available also.
International shipping calculated at checkout.**

Printed in durable, temperature tolerant PETG filament.

**International shipping options:  
1.  USPS First Class (2-12 weeks).  NOT GUARANTEED.  For lost or damaged packages I will replace or refund the items, but NOT the shipping cost. 

2.  UPS Expedited (1-2 weeks).  

Instructions for use:

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.