Filter thread on some lenses; used by some Pentax medium-format lenses.
Also, this is a widely used thread in astronomy.
Equipment and systems: ZWO Camera Angle Adjuster
Explore Scientific AR152 drawtube
Cookie
This website requires cookies to provide all of its features. For more information on what data is contained in the cookies, please see our Privacy Policy page. To accept cookies from this site, please click the Accept button below.
