Tamron 17-35mm f/2.8-4 Di OSD + Variable ND Filter

Tamron 17-35mm f/2.8-4 Di OSD + Variable ND Filter

The Tamron 17-35mm f/2.8-4 Di OSD (Model A037) is a lightweight, budget-friendly ultra-wide-angle zoom lens designed for full-frame Canon EF and Nikon F mount DSLR cameras. It stands out as an excellent option for landscape, travel, and architectural photography, balancing high optical sharpness with a compact form factor.

Key Specifications

• Focal Length: 17-35mm (Ultra-wide to standard wide)
• Aperture Range: Variable f/2.8 at 17mm to f/4 at 35mm (Minimum aperture f/16 - f/22)
• Weight & Size: 460 grams; 90mm long x 83.6mm diameter
• Filter Thread Size: 77mm (Allows regular screw-on circular filters)
• Autofocus Motor: OSD (Optimized Silent Drive) stepping motor
• Optical Layout: 15 elements in 10 groups, including 4 Low Dispersion (LD) and 2 Glass Molded Aspherical elements
• Weather Sealing: Moisture-resistant construction with multiple internal seals and a lens mount gasket.

Pros

• Superb Sharpness: Excellent center-frame sharpness and contrast across the entire zoom range, even when shooting wide open.
• Portability: Extremely light and compact compared to continuous f/2.8 ultra-wides, making it perfect for hiking and travel.
• Brighter Aperture Curve: Offers better light transmission over most of its focal range than competing constant f/4 wide-angle lenses.
• Weather Resistant: Robust environmental sealing and a fluorine-coated front element protect against dust, moisture, and fingerprints.
• Astro-Capable: Features very low coma distortion, allowing stars to remain crisp points in low-light night skies.