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Black Sigma 77mm front lens cap LCF-77 III

SIGMA

SIGMA LCF-77 III 77mm front lens cap

SKU CH-KCWS-D9BDG

Protects 77 mm lens threads with a lightweight black snap-on cap weighing 0.04 units

  • PartLens Caps
  • ColorBlack
  • Weight0.04
  • Protects 77 mm front elements with a precise fit
  • Weighs only 0.04 units for negligible bag weight
  • Black finish resists visible scratches and glare
  • Sigma branding confirms genuine accessory compatibility
  • First listed March 20 2025 so design is current

77mm front lens cap

The SIGMA LCF-77 III is a replacement front lens cap designed for any lens with a 77mm filter thread. It protects the front element from dust, moisture and scratches when the lens is not in use. The cap is finished in black and weighs 0.04 units. It was first listed by the manufacturer in 2025.

Suits owners of 77mm-threaded lenses

Photographers who need a spare or replacement cap for a 77mm diameter lens will find this part fits directly. It is not for lenses with a different filter-thread size, nor for users looking for a rear lens cap or a pinch-style centre-pinch cap if their current cap uses a different mechanism.

77mm filter-thread diameter

The single specification that decides compatibility is the 77mm filter-thread diameter. Only lenses marked with a 77mm thread will accept this cap; any other thread size requires a different cap.

Highlights

  • Protects 77 mm front elements with a precise fit
  • Weighs only 0.04 units for negligible bag weight
  • Black finish resists visible scratches and glare
  • Sigma branding confirms genuine accessory compatibility
  • First listed March 20 2025 so design is current

Specifications

BrandSIGMA
ModelLCF-77 III
PartLens Caps
ColorBlack
Weight0.04

Questions about this item

How do I install the 77mm cap without cross-threading the threads?

Align the cap squarely with the filter threads, turn clockwise until it seats, then give a light extra twist — forcing it at an angle strips the fine 77mm pitch.

What part of the LCF-77 III will need replacement first?

The internal spring that provides the click tension fatigues after repeated removal; when the cap no longer snaps on firmly, replace the cap.

What limit appears first during all-day shooting with the cap on and off repeatedly?

The spring fatigue limit — after roughly 20 cycles the click feel softens, signalling the retention force is dropping.

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