New Ultra Multi Focal Length All-In-One Zoom Lens.tamron's new 50-300mm F/4.5-6.3 Telephoto Zoom Lens is designed for Sony E-mount cameras has features that guarantee any user with versatility and ease of use.Lightest in its ClassWeighing only 665 grams, this lens is the lightest in its category of 300mm lenses compatible with full-frame mirrorless cameras. Thanks to its thoughtful design, the lens is easy to carry and can be used for longer periods of time than heavier lenses.High Speed and Precise Afa fast and precise autofocus makes sure that subjects are quickly caught and are clear in every shot, even if they are moving. This translates to fewer missed or deleted shots because photos are sharper.Half-Macro Photography at 50mmWith the 50mm focal length, users can experiment with "half-macro photography." Get up close (up to 22 cm!) away from your subject and capture every detail the way you want to, all without needing a dedicated macro lens.