Tamron 20mm f/2.8 Di III OSD M 1:2 Lens for Sony E

Tamron 20mm f/2.8 Di III OSD M 1:2 Lens for Sony E
Compact Ultra-Wide Prime with Half Life-Size Macro Capability – 1:2 Maximum Magnification Ratio, Ultra-Close 4.3″ Minimum Focusing Distance, Modestly Bright f/2.8 Maximum Aperture, Three Low Dispersion (LD) Elements & One Molded Glass Aspherical Element, BBAR (Broad-Band Anti-Reflection) Coating, OSD (Optimized Silent Drive) Stepping AF Motor with Full-Time Manual Focus Override, Rounded 7-Blade Diaphragm, Moisture-Resistant Sealing with Protective Fluorine Front Coating, Full-Frame & APS-C Compatibility, Native Sony E-Mount (Excellent Condition)

The Tamron 20mm f/2.8 Di III OSD M 1:2 is a sleek, ultra-wide prime lens engineered specifically for full-frame Sony E-mount mirrorless cameras. Combining an expansive field of view with an ultra-lightweight form factor, it provides landscape photographers, architectural documentarians, interior shooters, and travel vloggers with dynamic wide-angle coverage in an unobtrusive footprint. The f/2.8 maximum aperture strikes an ideal balance between low-light capability and a svelte profile, making it a reliable choice for handheld walkaround shooting and gimbal-mounted video production.

Setting this ultra-wide prime apart is its close-up versatility, achieving a half life-size 1:2 maximum magnification ratio at a minimum focusing distance of just 4.3 inches. This enables dramatic foreground emphasis with expansive background context. The advanced optical design employs three Low Dispersion (LD) elements to control chromatic aberrations and color fringing, paired with a precision molded glass aspherical element to eliminate spherical aberrations and distortion for edge-to-edge sharpness. Tamron’s proprietary BBAR (Broad-Band Anti-Reflection) coating prevents ghosting and lens flare, maintaining rich contrast and color accuracy in backlit conditions. Driven by an OSD (Optimized Silent Drive) stepping motor, autofocus is fast, quiet, and precise, complete with full-time manual override. A moisture-resistant chassis and a smudge-resistant fluorine front coating ensure dependable field operation in adverse weather.

KEY FEATURES & PERFORMANCE HIGHLIGHTS

Half Life-Size 1:2 Macro Capability: Focuses down to an ultra-close 4.3″ to capture fine details with dramatic wide-angle perspective.

Ultra-Wide 20mm Perspective: Captures sweeping landscapes, tight architectural interiors, and dynamic environmental compositions.

Portable f/2.8 Form Factor: Balances low-light capability with a lightweight, compact footprint suited for all-day handheld and gimbal use.

Advanced Optical Architecture: Features three LD (Low Dispersion) elements and a molded glass aspherical element to suppress chromatic and spherical aberrations.

BBAR Multi-Coating: Minimizes internal reflections, surface glare, and ghosting to preserve contrast and color saturation in bright scenes.

Quiet OSD Stepping Motor: Delivers smooth, quiet autofocus tracking for stills and video, supported by full-time manual focus override.

Rounded 7-Blade Iris: Yields smooth circular bokeh highlights and natural background blur for subject isolation.

Weather-Resistant Construction: Moisture-resistant gaskets protect internal components, backed by a protective fluorine front coating that repels water and oil.

APS-C Format Versatility: Mounts natively to Sony APS-C bodies to deliver a 30mm equivalent wide-standard focal length.

COMPREHENSIVE CAMERA COMPATIBILITY

Full-Frame Sony E-Mount Cameras: Fully compatible with full-frame Sony mirrorless bodies (including Sony a7 IV, a7R V, a7C II, a7CR, a7S III, a9 III, and a1).

APS-C Sony E-Mount Cameras: Mounts natively to Sony APS-C bodies (such as Sony a6700, a6600, a6400, and ZV-E10 series), providing an effective 30mm wide-angle equivalent.

TECHNICAL SPECIFICATIONS

Product Type: Full-Frame Ultra-Wide Prime Lens with Close-Up Capability

Brand: Tamron

Model: 20mm f/2.8 Di III OSD M 1:2 (Model F050)

Lens Mount: Sony E-Mount

Format Compatibility: 35mm Full-Frame (APS-C Equivalent: 30mm)

Focal Length: 20 mm

Maximum Aperture: f/2.8

Minimum Aperture: f/22

Angle of View: 94° 30′ (Full-Frame)

Maximum Magnification Ratio: 1:2 (Half Life-Size)

Minimum Focus Distance: 4.3 inches / 11.0 cm

Optical Formula: 10 Elements in 9 Groups (3 LD Elements, 1 Molded Glass Aspherical Element)

Lens Coatings: BBAR (Broad-Band Anti-Reflection) Coating & Front Fluorine Protective Coating

Diaphragm Blades: 7 (Rounded Circular Aperture)

Autofocus Drive: OSD (Optimized Silent Drive) Stepping Motor

Focus Control: Manual Focus Ring with Full-Time Manual Override

Filter Thread Size: 67 mm (Front Screw-In)

Weather Sealing: Moisture-Resistant Construction with Mount Gasket

Physical Dimensions: Approx. 2.87 x 2.52 inches / 73.0 x 64.0 mm

Unit Weight: Approx. 7.6 oz / 215 g

Physical Condition: Excellent cosmetic, optical, and fully functional operational condition

Finish: Matte Black Barrel with Clean White Engravings

Function: Landscape Photography, Architectural & Real Estate Interiors, Dynamic Environmental Video, Close-Up Macro Details & Compact Travel Imaging