Basic Birding setup, also works wonderfully for any distant subject, including surfing, skiing photos from land. The R7's 32mp APS-C sensor gives a 1.6x crop factor, making the effective focal length of the RF 800mm f/11 1380mm. This bundle is best for the photographer on a budget and that is not shooting in very low light conditions. 2x and 1.4x  converters available for and extra charge. CPL Filter available for an extra charge