w/Caps【Mint】Nikon Micro-NIKKOR 55mm f/2.8 Ai-s Macro *Aperture Stuck* #E0307

• Focus ring works smoothly
• Aperture ring turns, but the aperture blades stay fully open (do not stop down)

• No fungus
• No haze or fog
• No scratches
• No balsam separation

• Brand: Nikon
• Model: Micro-NIKKOR 55mm f/2.8 Ai-s
• Lens Type: Manual Focus Macro Prime Lens
• Lens Mount: Nikon F (Ai-s)
• Compatible Cameras: Nikon F-mount film and digital SLRs (metering support varies by body); mirrorless via adapter
• Focal Length: 55mm
• Maximum Aperture: f/2.8
• Minimum Aperture: f/32
• Lens Construction: 6 Elements in 5 Groups
• Close-Range Correction: CRC (Close-Range Correction) system
• Lens Coating: Nikon Integrated Coating (NIC)
• Angle of View: 43° (35mm format)
• Minimum Focusing Distance: 0.25 m (0.82 ft)
• Maximum Magnification: 1:2 (0.5x); 1:1 with PK-13 extension tube
• Focus Type: Manual Focus
• Aperture Blades: 7
• Filter Size: 52 mm
• Dimensions (Approx.): 63.5 × 62.5 mm
• Weight (Approx.): 290 g
• Release Year: 1979
• Made in: Japan

The Nikon Micro-NIKKOR 55mm f/2.8 Ai-s is one of the most respected manual-focus macro lenses ever made for the Nikon F mount. Renowned for its outstanding sharpness and flat-field performance, it has been a favorite of scientific, copy-work, and close-up photographers for decades, and it is equally capable as a general-purpose standard lens.

Its 6-element, 5-group optical design incorporates Nikon's Close-Range Correction (CRC) system, which moves lens groups independently to maintain excellent image quality from close-up distances all the way to infinity. This gives the lens a remarkably consistent performance across its focusing range, something many macro lenses of its era could not match.

The lens focuses down to 0.25 m, reaching a 1:2 reproduction ratio on its own, and it can achieve life-size 1:1 magnification with the dedicated PK-13 extension tube. This makes it ideal for photographing flowers, insects, coins, stamps, jewelry, documents, and fine details of all kinds.

Build quality reflects the best of Nikon's Ai-s era: an all-metal barrel, a long and smooth focusing helicoid with precise damping, and a compact size of only around 290 g. The deeply recessed front element naturally shields against flare, so a separate hood is rarely necessary.

On film and digital Nikon cameras alike, the lens delivers crisp detail with natural contrast and faithful color. Its 55mm focal length provides a natural perspective that also makes it pleasant for street photography, still life, and everyday shooting when you are not working close up.

With a simple adapter, the Micro-NIKKOR 55mm f/2.8 Ai-s mounts easily on mirrorless systems such as Sony E, Fujifilm X, Nikon Z, Canon RF, and Micro Four Thirds. Focus peaking and magnified view make precise macro focusing especially easy, and the lens's high resolving power holds up very well on modern sensors.

Many photographers still consider this lens one of the finest macro optics ever produced for the 35mm format. Its combination of sharpness, compactness, and mechanical quality explains why it remains in steady demand among collectors and working photographers.

For anyone interested in close-up photography, copying, or simply owning a classic piece of Nikon optical engineering, the Micro-NIKKOR 55mm f/2.8 Ai-s is a lens that deserves a place in the collection.