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Silver Pentax K-mount macro lens barrel with manual aperture ring

Tether Tools

Tether Tools Laowa 100mm f/2.8 2x Ultra Macro APO Lens Pentax K

SKU CH-4R3A-RC705

A 100mm f/2.8 manual macro lens for Pentax K reaching 2x magnification at 9.72" minimum focus with APO correction

  • 2× life-size magnification reveals unseen detail at 9.72" minimum focus
  • APO design minimizes chromatic aberration for true-to-life color accuracy
  • 100mm focal length suits both macro and portrait work
  • Manual focus and aperture give precise creative control
  • Full-frame coverage from 2:1 to infinity focus range

Laowa 100mm f/2.8 2x Ultra Macro APO Lens

The Laowa 100mm f/2.8 2x Ultra Macro APO Lens is a manual-focus lens for Pentax K-mount cameras. It achieves 2x magnification with a minimum focus distance of 9.72 inches, revealing details beyond life-size reproduction. The apochromatic design minimises chromatic aberration for true-to-life colour accuracy. The 100mm focal length suits both macro and portrait photography.

Manual focus and aperture installation notes

The lens mounts directly to the Pentax K bayonet without electronic contacts, so no firmware or driver setup is required. Manual aperture and focus rings give full tactile control but demand practice for precise adjustments at high magnification. Users unfamiliar with stopped-down metering or focus peaking may find initial framing and exposure slower than with autofocus lenses.

Compatibility checks before ordering

Confirm that your camera body uses the Pentax K mount and supports manual lenses with stop-down metering or focus-assist features. Full-frame coverage is provided, so APS-C bodies will apply a crop factor to the 100mm field of view. The lens focuses from 2x magnification to infinity, so ensure your shooting style matches this range rather than requiring autofocus or electronic aperture control.

How it compares

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

Price $375.99
Cheaper than about 69% of the 2,570 comparable items (median $546.49).

Specifications

No published specifications for this item yet.

Questions about this item

How can I confirm the lens is delivering 2x magnification at the 9.72" minimum focus distance?

Frame a ruler at the closest focus setting; the image should show half the subject size at 2x reproduction ratio.

Which accessories are included and which must be purchased separately?

The lens ships with front and rear caps; filters, hoods and tripod collars are sold separately.

Should I choose this 100mm f/2.8 or the 60mm f/2.8 for greater working distance?

The 100mm focal length provides more working distance at the same 2x magnification, better for skittish subjects.

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