Phone Skope's C3-026-A optic adapter is one of two required pieces. This adapter is made out of ABS plastic and locks into the Phone Skope phone case and slides over the optic eyecup, creating a secure fit.
This adapter fits the following optics: Kowa 883/884; Vortex Razor HD 65/85.
Note: This Vortex Razor is green and gray with two focus knobs.