Vivitar Automatic Tele Converter 2X-5 (Pre-Owned)

Functionality: The Vivitar 2X-5 Tele Converter doubles the focal length of the lens it is attached to. For instance, a 50mm lens would effectively become a 100mm lens when used with this teleconverter.

Compatibility: It was available for various camera mounts, including Nikon F-mount, Canon FD mount, and others. Specific models were designed for different camera systems, so it's important to ensure you have the version compatible with your camera.

Features: The "Automatic" designation indicates that it allows for automatic exposure metering and aperture control through the camera body. This enables the camera's metering system to adjust exposure settings correctly when the teleconverter is attached.

Optical Quality: Teleconverters typically reduce the amount of light reaching the camera sensor (usually by 2 stops with a 2x converter) and can introduce some optical compromises such as decreased sharpness, increased chromatic aberration, or distortion. The exact impact on image quality can vary depending on the specific lens used and shooting conditions.

Usage: Teleconverters like the Vivitar 2X-5 are popular among photographers who need extra reach without carrying additional long lenses. They are commonly used in wildlife photography, sports photography, and other scenarios where a longer focal length is beneficial.

Manual Control: While it supports automatic exposure metering, you may still need to manually adjust focus as most teleconverters do not affect the autofocus capabilities of the lens directly.