Quantaray 28mm F/2.8 Manual Focus Lens for Pentax K Mount

Quantaray 28mm f/2.8 Manual Focus Lens for Pentax K-Mount {52mm/62mm Filter Thread Series}
Vintage Wide-Angle Prime with Classic All-Manual Tactile Handling
The Quantaray 28mm f/2.8 is a classic, all-manual wide-angle prime lens designed for traditional Pentax K-mount 35mm film cameras and compatible digital SLR bodies. Offering a broad, natural 28mm field of view, this vintage prime is an exceptional, budget-friendly selection for street photography, environmental portraits, architectural textures, and casual landscapes.

Built with a rugged, old-school metal barrel and featuring a modestly bright f/2.8 maximum aperture, this lens provides full creative control over focus and exposure, making it an excellent tool for students, film enthusiasts, and digital shooters experimenting with vintage glass.

WELL-USED CONDITION NOTE (FULLY OPERATIONAL)
This vintage lens has been thoroughly inspected and is 100% mechanically and optically functional, performing exactly as intended. However, it shows clear signs of age and previous field use:

Cosmetic Field Wear: The outer lens barrel and mounting ring exhibit visible scuffs, paint thinning, and surface scratches from years of handling.

Internal Glass Elements: There are minor, scattered internal dust specks present between the glass layers. This is entirely normal for a lens of this era and will not affect image quality, contrast, or resolution.

No Fungus / No Haze: The optical elements are completely free of destructive fungus, clouding, separation, or internal haze.

Mechanical Adjustments: The manual focus ring turns smoothly with positive resistance, and the mechanical aperture ring clicks sharply into place at every stop. The internal diaphragm blades are clean and free of oily residue.

Broad Wide-Angle Field & Bright f/2.8 Aperture
Versatile 28mm Perspective: Delivers a classic wide-angle frame on full-frame film and digital bodies, allowing you to capture expansive street scenes or interior spaces without heavy geometric distortion. On crop-sensor APS-C DSLRs, it provides a highly useful ~42mm standard equivalent focal length.

Bright f/2.8 Maximum Aperture: Offers reliable light transmission for available-light interior photography or evening street walks, while providing pleasant depth-of-field separation for close-up subjects.

Tactile All-Manual Control Interface: Features a fully mechanical manual focus ring with a generous rotational throw for precise focus acquisition, alongside a physical aperture selection ring spanning from f/2.8 down to f/22.

Durable Vintage Construction
Rugged All-Metal Barrel: Engineered during an era of robust lens manufacturing, featuring a durable metal chassis that easily withstands daily field bumps and long-term storage.

Universal Pentax K-Mount Compatibility: Mounts natively to legacy Pentax manual film cameras (such as the K1000, ME Super, and LX), and can be used on modern Pentax digital SLR bodies in manual or aperture-priority metering modes.

Standard Threaded Filter Ring: Built with a durable front threaded rim, allowing you to easily screw on standard protective UV filters, circular polarizers, or black-and-white contrast filters.

Technical Specifications
Lens System Classification: Vintage Manual Focus Wide-Angle Prime Lens

Lens Mount Architecture: Pentax K-Mount (PK)

Focal Length Proximity: 28mm Wide-Angle Prime

Maximum Aperture Profile: f/2.8

Minimum Operational Aperture: f/22

Focusing Control Method: Completely Mechanical Manual Focus Only

Minimum Focus Distance: Approx. 12 inches / 30 cm

Aperture Control System: Mechanical Aperture Ring with Click Stops

Optical Element Condition: Functional with minor internal dust specks (Fungus-free)

Chassis Shell Composition: Heavy-Duty Machined Metal Construction

Front Filter Thread Diameter: 52mm or 62mm (Depending on exact production series line variation)