USED TAMRON 17-50mm SP

Item Details:

• Brand: Tamron
• Model: SP 17-50mm F2.8 XR Di II LD Aspherical IF
• Mount Type: Nikon F
• Format: APS-C
• Focal Length: 17-50mm (equivalent to 25.5-75mm on APS-C)
• Maximum Aperture: f/2.8
• Minimum Aperture: f/32
• Lens Construction: 16 elements in 13 groups, including low dispersion and aspherical elements
• Diaphragm Blades: 7 (rounded)
• Filter Size: 67mm
• Weight: 398g
• Dimensions: 74mm (Diameter) x 81.7mm (Length)

Key Features:

• Constant f/2.8 Aperture: Offers consistent exposure and depth of field control across the zoom range.
• XR (Extra Refractive Index) Glass: Provides better image quality by reducing chromatic aberration and distortion.
• LD (Low Dispersion) Elements: Minimize chromatic aberrations for sharp and clear images.
• Aspherical Elements: Help reduce spherical aberrations and distortion.
• Internal Focusing (IF) System: Allows for faster and quieter focusing without changing the length of the lens, making it more stable and easier to handle.
• Compact and Lightweight Design: Makes it convenient for travel and general photography.

Performance:

• Sharpness: Very good sharpness, especially in the center, with slight softness in the corners at wide apertures.
• Distortion: Well-controlled distortion, minimal at the wide end with slight pincushion at the telephoto end.
• Vignetting: Some vignetting at f/2.8, which reduces significantly when stopped down.
• Chromatic Aberration: Effectively controlled due to the use of LD elements.
• Build Quality: Solid construction with a mix of metal and high-quality plastic components.