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APO (Apochromatic)
In order to attain the highest quality images, the APO lens has been made using special low-dispersion (SLD) glass and is designed to minimize color aberration.
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ASP (Aspherical)
The aspherical lens complex allows freedom of design, improved performance, a reduced number of component lenses and a compact size.
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OS (Optical Stabilizer)
This function utilizes a build-in mechanism that compensates for camera shake. It dramatically expands photographic possibilities by alleviating camera movement when shooting by hand held camera.
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HSM (Hyper-sonic Motor)
This lense uses a motor driven by ultrasonic waves to provide a quiet, highspeed AF.
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RF (Rear Focus)
This lense is equipped wiht a system that moves the rear lens group for highspeed, silent focusing.
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IF (Inner Focus)
To ensure stability in focusing, this lens moves the inner lens or groups without changing the lens' physical length.
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Conv (APO Teleconverter Ex)
This lens can be used with the APO Teleconverter EX. It can increase the focal length and will interface with the camera's AE (automatic exposure) function.
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Ex (Ex Lens)
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The exterior of this lens is EX-finished to denote the superior build and optical quality, and to enhance its appearance
