The LCF-55 III from Sigma is a spare or replacement lens cap designed to fit lenses and cameras with a 55mm thread diameter. The lens cap utilizes a center-pinch and side-pinch design. It features a matte black finish with the Sigma logo on the front.

Squeeze Snap-on Lens Cap    55mm Thread Size

Related Questions and Answers

Q: 1. does this cap fit the sigma 24-70 f/2.8 lens?

A: If you are referring to the lasted 24-70mm lens in the Sigma EX series, Sigma EX 24-70mm f/2.8 DG HSM lens, then the answer is no. The lens has a 82mm filter ring.

Q: 2. Will this fit the slr magic product in link below? https://www.bhphotovideo.com/c/product/1403570-REG/slr_magic_slr82vnd86ie_82mm_self_locking_nd_0_4.html

A: Yes. The 86mm Image Enhancer 1.2 filter has 86mm front threads that accommodate other front-threaded filters, and will give the Sigma LCF-86 III enough room to sit. However, like with most filters, the threaded portion can sometimes be quite shallow, making lens caps a bit less secure than you might be familiar with.

Q: 3. will this work for my 18-35 sigma lens?

A: We're afraid not. The Sigma 18-35mm f/1.8 DC HSM Art Lens has a 72mm filter thread, this is 67mm. Instead you need B&H # SILCF723 which is Sigma's 72mm cap. https://bhpho.to/2d8CuwW

Q: 4. Does this cap fit the Sigma 24-70mm lens?

A: It depends what version of the Sigma 24-70mm lens you have. The ART Series f/2.8 lenses take an 82mm lens cap, like the Sigma LCF-82 III 82mm Lens Cap (http://bhpho.to/2aGYD3J)

Q: 5. Will it fit the 24-105mm?

A: The Sigma LCF-105 III 105 MM lens cap. fits a Sigma 105mm F/2.8 EX DG OS Macro Lens which has a 62MM filter Diameter. I have a Sony 24-105 mm lens which has a 62mm filter Diameter. It would fit my lens. If your lens is 62MM diameter it will fit. If your lens is any other filter Dia. it will not fit.

Q: 6. Does this cap fit the 18-50mm 1:2.8 lens? I have a 72mm filter on the lens

A: I bought my lens cap for a sigma 18-70 lens you'll have to find one that fits your lens

Q: 7. What size will fit a Sigma 85mm art lens? I can't find that info anywhere, and it's hard to measure mm.

A: The filter size of the lens is 86mm.

Q: 8. Will this fit my sigma art 50mm?

A: The Sigma LCF-77 III 77mm Lens Cap, BH # SILCF773 is the proper cap for your lens.

Q: 9. Would this fit as a replacement lens cap for a Sigma 18-50mm F2.8 DC DN?

A: No, this would not fit the Sigma 18-50mm F2.8 DC DN. That lens has a 55mm filter size. The appropriate lens cap would be the Sigma LCF-55 III 55mm Lens Cap.

Q: 10. Will this fit Sigma 85mm lens?

A: The Sigma LCF-86 III 86mm Lens Cap will fit the Sigma 85mm f/1.4 DG HSM Art Lens for Canon EF, Nikon F or Sigma SA. If you have a different Sigma lens, this may not fit.