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Black 82 mm Pentax front lens cap, model 31830

PENTAX

PENTAX 82mm front lens cap 31830

SKU CH-NKQ9-K3QA6

82 mm front lens cap that snaps on securely to keep dust and debris off the glass

  • 82mm diameter fits compatible Pentax lenses
  • Black plastic construction resists everyday knocks
  • Snug fit blocks dust and debris
  • Protects front element for cleaner images
  • Essential accessory for pros and hobbyists

What the 82mm cap protects

The Pentax O-LC82 is a front lens cap that shields the front element of any lens with an 82mm filter thread. It keeps dust, moisture and accidental contact off the glass when the camera is stored or carried. Photographers who own Pentax or third-party lenses matching that thread size will find it a direct replacement for a lost or damaged original cap.

Limits of a press-fit plastic cap

The cap relies on a friction fit around the 82mm thread, so it stays secure during normal handling but can pop off if the lens is knocked hard or stuffed into a tight bag without a hood. It does not seal against water ingress and offers no impact protection for the lens barrel itself. Photographers who shoot in heavy rain or need a tethered cap should look for a different design.

Fitting and common issues

Installation is a simple press-on action; no tools or adapters are required. The most frequent problem is misalignment — pressing one side first can bend the thin plastic rim and leave a gap that lets dust in. Keeping the cap in a dedicated pocket and pressing evenly around the circumference avoids deformation and loss.

How it compares

Measured against everything we stock in Interchangeable Camera Lenses, at today’s prices. Recalculated every night.

Price $20.99
Cheaper than about 98% of the 2,570 comparable items (median $546.49).

Specifications

No published specifications for this item yet.

Questions about this item

Is the 82 mm cap the only size available for this Pentax model?

The supplier lists only the 82 mm front lens cap under part number 31830; other diameters are separate Pentax accessories.

How well does the 82 mm cap stay on during active shooting?

The snug-fit design grips the filter thread tightly, keeping dust and debris out while you move between shots.

Does the 82 mm thread match the standard filter size on Pentax lenses?

Yes, the cap threads onto any Pentax lens or filter with an 82 mm front thread, the common size for several Pentax wide-angle and zoom lenses.

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