Canon EF-s 55-250mm 1:4-5.6 IS Lens

Canon Zoom Lens EF-s 55-250mm 1:4-5.6 IS with Image Stabilizer

Canon EF-S 55-250mm f/4-5.6 IS STM lens.

Canon EF-S 55-250mm f/4-5.6 IS STM: A Detailed Description

1. Design and Build:

   • The Canon EF-S 55-250mm f/4-5.6 IS STM is designed specifically for Canon APS-C format DSLRs.
   • It features a compact and lightweight build, making it suitable for travel photography.
   • The lens has a traditional DSLR-style appearance, with physical switches for AF/M focusing modes and stabilization on/off.
   • The zoom and focus rings have chunky rubberized grips for comfortable handling.

2. Optical Construction:

   • The lens consists of 15 elements arranged in 12 groups.
   • Notably, it includes one UD (Ultra-low Dispersion) element, which helps reduce chromatic aberrations and enhances sharpness and contrast.
   • The front element does not rotate, allowing easy use of accessories like polarizing filters.
   • The lens offers an angle of view ranging from 27.8 to 6.25 degrees.

3. Aperture and Focusing:

   • The maximum aperture varies from f/4 at the wide end to f/5.6 at the telephoto end.
   • Autofocus is driven by a stepping motor (STM), which ensures near-silent and smooth focusing.
   • Full-time manual focus override is available even when using autofocus.

4. Image Stabilization:

   • The lens features a 3.5-stop image stabilizer (IS), which helps reduce camera shake during handheld shooting.
   • This stabilization system is particularly useful for telephoto focal lengths.

5. Specifications:

   • Mount: Canon EF-S
   • Full-frame Compatibility: No (designed for APS-C sensors)
   • Minimum Aperture: f/22-32
   • Minimum Focusing Distance: 0.85 meters
   • Maximum Magnification Ratio: 0.29x
   • Filter Size: 58mm
   • Dimensions: 70mm (diameter) x 111mm (length)
   • Weight: 375 grams

6. Pros and Cons:

   • Pros:
     • Compact and lightweight design
     • Useful telephoto reach (equivalent to 88-400mm in full-frame terms)
     • Improved optical design compared to its predecessor

In summary, the Canon EF-S 55-250mm f/4-5.6 IS STM is a versatile telephoto zoom lens suitable for various photography genres, including wildlife, sports, and travel. Its improved optical performance and lightweight design make it a great companion for those who want to capture distant subjects without carrying heavy gear.