This is a review of the Pentax F*300mmF4.5 – my favourite lens to capture memorable backyard wildlife and bird images . I have owned this 35-year-old, compact 300mm lens for almost 30 years and can attest to its solid build, excellent glass and a beautiful bokeh that results in exceptional images. Similar 300mm lenses are available from Canon, Sony, Nikon and Fuji so be sure to check them out.