Used Sigma AF 20mm F1.8 (Nikon)
- Regular price
- RM 988.00
- Sale price
- RM 988.00
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Item Details:
- Brand: Sigma
- Model: 20mm F1.8 EX DG Aspherical RF
- Mount Type: Nikon F
- Format: Full Frame (FX) and APS-C
- Focal Length: 20mm
- Maximum Aperture: f/1.8
- Minimum Aperture: f/22
- Lens Construction: 13 elements in 11 groups, including 2 aspherical elements
- Diaphragm Blades: 9
- Filter Size: 82mm
- Weight: 520g
- Dimensions: 88.6mm (Diameter) x 89.5mm (Length)
Key Features:
- Wide-Angle View: Provides a 94.5-degree angle of view on full-frame cameras, making it suitable for landscape, architectural, and astrophotography.
- Fast f/1.8 Aperture: Excellent for low-light conditions and creating a shallow depth of field.
- Internal Focus: The lens does not change length during focusing, and the front element does not rotate, making it easier to use filters.
- Build Quality: Robust construction typical of Sigma's EX series, designed to handle various shooting conditions.
Performance:
- Sharpness: Good center sharpness when stopped down to f/2.8 and beyond. The lens is softer wide open at f/1.8.
- Distortion: Minimal barrel distortion, which is well controlled for a wide-angle lens.
- Vignetting: Noticeable at f/1.8, reducing significantly by f/4.
- Chromatic Aberration: Some chromatic aberration is present, especially at wider apertures, but can be corrected in post-processing.
- Flare and Ghosting: The lens is prone to flare and ghosting, particularly when shooting into the light, despite the use of anti-reflective coatings.
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