The Weaver 6-hole Picatinny-Style Riflescope Rings 30mm High (Matte) use six no strip/slip Torx screws for max security and clamping pressure. These rings are constructed of lightweight aircraft-grade aluminum and comes with an added type-III anodized finish, built to withstand the toughest environments. These rings also feature improved crossbolt from Weaver to Picatinny spec, and an increased number of height options for your tactical scope.

Improved Weaver to Picatinny Crossbolt    Designed to Withstand Grueling Use    Steel Rings & Bases Lock Scopes In Place    Type-3 Hard Coat Anodized Finish

Related Questions and Answers

Q: 1. Hi! What I don't get, it's if I use it on my a6500 I'll be a 30mm lens or 45mm. Thanks!

A: It will be a 30 mm crop sensor lens on your a6500. To get the same view on a full frame camera like the a7 series, you would use a 45 mm full frame lens. You should find the lens very sharp and useful on your 6500 although the colors would need to be increased slightly in post processing.

Q: 2. Does the gf 30mm lens require slim 58mm filters or will normal thickness filters work without vignetting?

A: The FUJIFILM GF 30mm f/3.5 R WR Lens can work with normal filters. It does not need slim filters specifically.

Q: 3. Will the Sigma 30mm f/1.4 DC HSM Art Lens for Canon work with my Canon Rebel T3i?

A: Yes

Q: 4. Is compatible with t4i?

A: Yes, this lens will work with the T4i.

Q: 5. Will this fit my Nikon D90 camera?

A: Yes, the Sigma 30mm f/1.4 is compatible with the Nikon D90.

Q: 6. Wondering if this prime is noticeably sharper than the Fuji Gf 20-35?

A: Yes hte FUJIFILM GF 30mm f/3.5 R WR Lens is noticeably sharper than the 20-35mm zoom lens.

Q: 7. is this lens compatible with Sony a5000?

A: Yes, this is a Sony NEX E mount lens which is compatible with the a5000.

Q: 8. Does this lens work with sony a68?

A: Thank you for your interest in Sigma products. Yes, this lens is compatible with all Sony DSLR and DSLT cameras as well as the A68.

Q: 9. Is this lens compatible with the Canon C-100?

A: It should be, the EF mounts generally work well across the Canon family, however your auto-focus capabilities might not work as fluidly as the DSLR line of cameras.

Q: 10. Does the EM1's focus stacking work with this lens?

A: Olympus site says this is now compatible with focus stacking (which makes me happy!) https://cs.olympus-imaging.jp/en/support/imsg/digicamera/qa/products/em1m2/#08