Description
The Canon EF-S 18-135mm f/3.5-5.6 IS USM lens is a versatile zoom lens designed for APS-C-format DSLRs, providing a 28.8-216mm equivalent focal length range. Here are the key features that define its capabilities:
1. Dual-Purpose AF Motor:
- The lens incorporates NANO USM technology, combining a ring-type Ultrasonic Motor (USM) for stills-optimized focusing and a stepping motor (STM) for smooth and silent video-focused performance. This dual-purpose AF motor allows for quick and responsive autofocus throughout the zoom range, making it suitable for both still photography and video recording.
2. Image Stabilizer (IS) System:
- An Image Stabilizer system compensates for up to four stops of camera shake, enabling sharper handheld shooting in challenging lighting conditions or with slower shutter speeds. This feature benefits both photo and video applications, providing stability for smooth footage.
3. Optical Design:
- The optical design includes one ultra-low dispersion (UD) element and one aspherical element. These elements work together to minimize chromatic and spherical aberrations, enhancing clarity and sharpness throughout the zoom range.
4. Super Spectra Coating:
- Super Spectra coating has been applied to individual lens elements to minimize ghosting and flare. This enhances contrast and color neutrality, particularly when working in strong lighting conditions.
5. Versatile Focal Length Range:
- With a focal length range of 18-135mm, the lens covers wide-angle to telephoto perspectives, making it suitable for various shooting situations. This versatility allows users to capture a wide range of subjects without changing lenses frequently.
6. NANO USM Focusing System:
- The NANO USM system combines the benefits of a ring-type USM and an STM mechanism. This results in quick and accurate focusing that is also smooth and near-silent, catering to the needs of both photography and video applications. Full-time manual focus control is available when working in one-shot AF mode.
7. Power Zoom Adapter Compatibility:
- The lens is compatible with the optional PZ-E1 Power Zoom Adapter. This adapter allows for smoother, more natural, and silent zooming control, especially beneficial for video recording.
8. Rounded Seven-Blade Diaphragm:
- The seven-blade diaphragm contributes to a pleasing bokeh quality, enhancing the visual appeal of images when working with selective focus and shallow depth of field techniques.
