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The 45mm format is the closest approximation to human field of vision and captures high-resolution shots to an unparalleled degree of resolving power. Furthermore, the integration of VC into a 45mm fast standard prime lens for full-frame DSLR cameras is an industry-first.
Compose an image at will, without regard to shooting distance or ambient lighting constraints - to produce crisp, tack sharp images from f/1.8 full open aperture. The unique synthesis of a VC system in a 45mm lens with a best-in-class MOD of 0.29m redefines standard distance shooting - freeing the photographer to discover another dimension of personal style.
High Performance at f/1.8 Full Aperture
The open aperture is set to f/1.8 with optimized critical properties at a higher level: superb optical performance coupled with a VC system, a shorter MOD, and a well-balanced form factor. Rigorous simulation processes performed throughout the design phase are materialized in distinguished resolving power and beautifully-tuned background blur, a prominent feature to a fast-aperture, full-frame compliant optic.
The SP 45mm (MOD: 0.29m) offers best-in-class close focusing. A floating system design feature seamlessly optimizes image quality by shifting elements relative to the focus group in close shooting situations.
VC (Vibration Compensation) Integration, Setting Itself Apart
VC deployed on fast-aperture lenses dramatically enhances freedom of hand-held shooting under lime light or dim room light conditions by eliminating minute camera shake. In particular, cameras with high-pixel density imagers tend to pink up subtle vibrations, resulting in degradation of image quality. VC is an excellent attribute to acquire inherent high-fidelity images. 45mm is the very first lens that employs the VC functionality among the fast standard fixed focal lenses in full-frame format.
Ultrasonic Silent Drive (USD)
The USD actuator converts ultrasonic waves into rotational motion that delivers autofocus with responsiveness, accuracy, and speed without so much as a whisper. The photographer can easily use manual focus at any point while the AF system is operating without having to fumble for a switch.
Molded Glass Aspherical Elements
Two molded glass aspherical elements deliver planarity in field curvature. These elements ensure superb focusing uniformity over the entire field by compenstating for spherical and comatic aberrations.
LD (Low Dispersion) Glass
To further compensate for chromatic aberrations, the SP series lenses use an LD element. This element helps to deliver crisp, clear images without color fringing.
eBAND and BBAR Coating
eBAND (Extended Bandwidth and Angular-Dependency) Coating and BBAR (Broad-Band Anti-Reflection) Coating both provide superior anti-reflection properties. These technologies have been adapted to each lens and provide crystal clear images by suppressing element surface reflections that lead to ghosting and flare.
eBAND Coating is a nano-structured layer deployed on the critical element furface. In addition to regular anti-reflection coatings, eBAND Coating offers higher transmissivity and a significant improvement in anti-reflection characteristics against agulated incident rays.
Even when stopped down two steps, the nine-blade diaphragm mainstains its circular shape to deliver nicely-tuned background blur
Optimal Relative Illumination
The 45mm lens delivers exceptionally uniform illumination levels across the image field to avoid non-linear pattern or fall-off toward corners.
Developed for industrial optics, fluorine coating offers long-lasting oil and water resistance to the lens. Moisture and smudges wipe away, making it easy to keep your lens clean.
Constructed to prevent moisture from entering the internal mechanisms of the lens, the SP line is sealed to allow photographers to shoot outdoors in adverse conditions.
- Model: F013
- Focal Length: 45mm
- Maximum Aperture: f/1.8
- Angle of View (Diagonal): 51 Degrees 22' (for full-frame format); 34 Degrees 28' (for APS-C format)
- Optical Construction: 10 Elements in 9 Groups
- Minimum Object Distance: 0.29m (11.4 in)
- Maximum Magnification Ratio: 1:3.4
- Filter Size: 67mm
- Maximum Diameter: 80.4mm
- Length: 91.7mm (3.6 in)
- Weight: 540g (19 oz)
- Aperture Blades: 9 (Circular Diaphragm)
- Minimum Aperture: f/16
- Standard Accessories: Flower-Shaped Lens Hood, Lens Caps